KVM mysteries

I have a new 23" Cinema Display that I would like to use with my standard KVM 4 port switch. I would like to be able to switch between my powerbook, a G4, G5 and a PC. I've been looking for a female DVI to male 15 pin cable to plug the Cinema Display to my KVM. Anybody have any experience with this or any suggestions on if it can even be done? I have seen a DVI KVM but the older Macs and PCs don't have DVI.

Looking for a KVM that will perform it's duty on my system.
I Have a 21" Apple Studio Display (CRT). Great monitor for print graphics.
I am running a dual 2g G5:
Machine Model: PowerMac7,2
CPU Type: PowerPC 970 (2.2)
Number Of CPUs: 2
CPU Speed: 2 GHz
L2 Cache (per CPU): 512 KB
Memory: 2.5 GB
Bus Speed: 1 GHz
Boot ROM Version: 5.0.7f0
I also have a G4 450 with scsi connectors that I use to run a very nice Epson scanner. Plenty of RAM and HD space. May be used for Back-ups as well.
I want to use both of these Macs on my single monitor.
I have tried the Belkin flip (regular w/remote button - no video - and the Mac Mini version - chaos! ... opening CD trays, volume up and down, auto monitor switching). I am not alone in that experience as I have found out!
I tried the iogear 2 port USB KVM - no video. Customer support was helpful but unable to solve the problem as they just discovered that it wont support the Studio Displays. I was impressed with their efforts though.
I am currently connecting my Studio Display to the G5 by a VGA to DVI Apple connector.
All this said, is there a reasonably priced KVM that will handle this set-up?
All I need is a 2 port USB KVM. It doesn't have to be pretty either!
Thanks
G5/G4   Mac OS X (10.4.7)   Apple 21" Studio Display

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    Last edited by rb3 (2015-06-05 02:01:20)

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  • [SOLVED] After qemu update: KVM does not work anymore

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    Last edited by ffcitatos (2013-03-07 06:47:06)

    Interestingly, mine worked without being in the new group. However, I think that's because I hadn't logged out since the update, so the session didn't know that I had been removed from the group. Though I could be missing something.

  • KVM resolution problem

    Hi; I have a 2.16 with an Apple mini DVI to VGA adapter trying to connect to a LCD display through a Belkin KVM. The problem is that the desktop will show up on both monitors momentarily then go blank (both), after a few seconds the MB display will come on at a different resolution and the external display will show "No signal". A few seconds later they will both come back on at a different resolution and then immediately go blank again. This goes on until the DVI connector is pulled.It goes through many different combinations of settings. I think (a dangerous thing) that for some reason the MB and external monitor can't resolve the proper settings and so just goes into a loop of check and reset. My question, is it possible to set a default setting for any external monitor connected so that the two will sync? I have a 1.8 G5 connected also and it has no problems although it is a different situation.

    Hi,
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  • How do i connect my mac mini to a kvm switch using the hdmi to dvi adapter?

    I want to connect my Mac Mini using the HDMI to DVI adapter to a KVM switch cable. I have an Iogear KVM switch. The cable from the KVM switch has a male VGA end connection. I have been trying to determine the right adapter to connect the female DVI connection to the male VGA connector. I will be using the Mac mini and a PC running through the KVM switch. This is doable as the iogear switch is compatible with both a PC and a Mac. Any ideas out there? Thank you.

    You would need to get  HDMI or DVI to VGA CONVERTER, not a simple adopter. The converter requires USP connection for power. HDMI is only digital while VGA is analogue.
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  • Mac mini with KVM switch

    I'm thinking of getting a Mac mini, but I need my Windows PC for some apps that aren't available on Mac and some other stuff. I can't afford to get a large monitor for a Mini if I get one, but my current PC has a big flat panel display.I noticed the KVM cable way of moving your stuff (a cale taht lets peripherals like monitors, keyboard and mice be connected to two computers so you don't need a separate one for eache computer), and was wondering if that's a possible way of using both without buying monitors, etc. for the Mini.
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    Thanks,
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    My experience with my Belkin KVM is also good, with the exception of one thing. I can't switch back to the Mini once I've switched to the PC. I have to unplug the PS2/USB adapter from the Mini and THEN do Scroll Lock-Scroll Lock 2. The KVM then switches, and I can plug back in. Everything works fine after that. It gets cumbersome though if you want to switch seamlessly between the two.
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  • Mini won't boot when VGA is attached to KVM -- help!

    My mini (Core Duo 1.86MHz, all updates installed) is attached to a Belkin Pro2 4-port KVM (F1DA104T). I've read comments about issues with KVMs being picky with the mini, but the mini won't even completely boot when the VGA cable is attached. I've used this KVM with other 10.4 Macs in the past (G3's, G4's), so I didn't expect problems. The monitor is a Dell 17" LCD (E173FP), which is fine when attached directly to the mini. I've also tried another LCD (different manufacturer) with same results.
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    VGA/SVGA Display
    0 1 2 3 4 5 6 7 8 9 A B C D E F
    0 | 00 FF FF FF FF FF FF 00 00 00 00 00 00 00 00 00
    1 | 0A 0A 01 01 0C 1E 17 BE E8 2D C9 A0 57 47 98 27
    2 | 12 48 4C 00 00 00 01 01 01 01 01 01 01 01 01 01
    3 | 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01
    4 | 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01
    5 | 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01
    6 | 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01
    7 | 01 01 01 01 01 01 00 00 00 00 00 00 00 00 00 20
    Valid DDC block: checksum passed
    EDID Version........1.1
    [email protected]@@
    Product Code........0 (0000) (0000)
    Serial Number.......0
    Manufactured........Week 10 of year 2000
    Max H Size..........30 cm
    Max V Size..........23 cm
    Gamma...............2.90
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    Display type:
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    </pre>
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    Jeff

    Hi BSteely,
    Thanks for taking the time to look into this.
    The blue screen I see is definitely not being generated by the LCD - it's coming from the Mac. It's coming up just after the gray Apple logo you see when booting. Normally you'd next see the finder pop up, but that never happens as long as the KVM is plugged into the mac (and it's only the VGA connection which is doing this, since the same thing happens with the keyboard/mouse unplugged from the mac). Once I remove the VGA cable, it continues to boot normally. If I hookup the LCD directly to the mac, it also boot normally.
    Sorry I wasn't clear about VNC. I'm not seeing two displays at once, I'm seeing two different displays -- one when the kvm is on the mac's channel, and another when it switches away. Funny enough, I'm getting MORE resolution choices when I'm not on channel. The DDC info I posted above is for when I'm on channel.
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  • I am trying to setup kvm. Am I on the right track?

    I am trying to  set up kvm and am a bit confused (probably by old information)
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    L1i cache: 64K
    L2 cache: 2048K
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    CONFIG_KVM_ASYNC_PF=y
    CONFIG_KVM_VFIO=y
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    virtio_scsi 17714 0
    virtio_blk 17295 0
    virtio_net 26460 0
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    Last edited by spottyrover (2014-09-10 04:08:08)

    1. tags around your raw output!1. [ code ] tags around your raw output! 1.
    Looks pretty now. Always wondered how that was done
    2. Did you deplete the usefulness of https://wiki.archlinux.org/index.php/KVM to its entirety?
    that is what I am trying to follow.
    Is there more modules needed?
    Did it work correctly?
    It lacks information on how to add modules.
    I got it  working the first time by following multiple how tos and in the end I do not know which bits I done was needed and which bits was not  and they did.
    By the way. You did not answer the question.
    Am I on the right track?
    After all I am in the newbie corner
    Dave
    Last edited by spottyrover (2014-09-10 04:28:24)

  • Mac Pro keeps crashing when using with KVM. where to start my investigation

    hi guys.
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    NOTES:
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    here is the log. as you will see it stops at 13:04 and then continues at 13:08 after reboot.
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    Alex
    EDIT: specs for machines are:
    Mac Pro dual 2.6GHz, 1GB (+1GB aftermarket added half a year back, works perfectly), HDD 260GB, Nvidia 7300 256Mb.
    PC - Supermicro dual xeon 1.6GHz, 4GB Ram, 4 x 36GB SCSI, Nvidia 5200 256 MB with Windows 2000 Server.
    Apr 18 13:03:38 localhost kernel[0]: hi mem tramps at 0xffe00000
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    Apr 18 13:03:38 localhost kernel[0]: ACPI CA 20060421
    Apr 18 13:03:38 localhost kernel[0]: AppleIntelCPUPowerManagement: ready
    Apr 18 13:03:38 localhost kernel[0]: AppleACPICPU: ProcessorApicId=0 LocalApicId=0 Enabled
    Apr 18 13:03:38 localhost kernel[0]: AppleACPICPU: ProcessorApicId=1 LocalApicId=1 Enabled
    Apr 18 13:03:38 localhost kernel[0]: AppleACPICPU: ProcessorApicId=2 LocalApicId=7 Enabled
    Apr 18 13:03:38 localhost kernel[0]: AppleACPICPU: ProcessorApicId=3 LocalApicId=6 Enabled
    Apr 18 13:03:38 localhost kernel[0]: AppleACPICPU: ProcessorApicId=4 LocalApicId=0 Disabled
    Apr 18 13:03:38 localhost kernel[0]: AppleACPICPU: ProcessorApicId=5 LocalApicId=0 Disabled
    Apr 18 13:03:38 localhost kernel[0]: AppleACPICPU: ProcessorApicId=6 LocalApicId=0 Disabled
    Apr 18 13:03:38 localhost kernel[0]: AppleACPICPU: ProcessorApicId=7 LocalApicId=0 Disabled
    Apr 18 13:03:38 localhost kernel[0]: Copyright (c) 1982, 1986, 1989, 1991, 1993
    Apr 18 13:03:38 localhost kernel[0]: The Regents of the University of California. All rights reserved.
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    Apr 18 13:03:38 localhost kernel[0]: Started CPU 01
    Apr 18 13:03:38 localhost kernel[0]: Enabling XMM register save/restore and SSE/SSE2 opcodes
    Apr 18 13:03:38 localhost kernel[0]: Started CPU 02
    Apr 18 13:03:38 localhost kernel[0]: Enabling XMM register save/restore and SSE/SSE2 opcodes
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    Apr 18 13:03:38 localhost kernel[0]: disabled
    Apr 18 13:03:38 localhost kernel[0]: rooting via boot-uuid from /chosen: BE5A00F3-0C3D-4125-9DE4-3F2193D3DAA8
    Apr 18 13:03:38 localhost kernel[0]: Waiting on <dict ID="0"><key>IOProviderClass</key><string ID="1">IOResources</string><key>IOResourceMatch</key><string ID="2">boot-uuid-media</string></dict>
    Apr 18 13:03:38 localhost kernel[0]: USB caused wake event (EHCI)
    Apr 18 13:03:38 localhost kernel[0]: FireWire (OHCI) TI ID 8025 built-in now active, GUID 0016cbfffe6cfb5c; max speed s800.
    Apr 18 13:03:38 localhost kernel[0]: Got boot device = IOService:/AppleACPIPlatformExpert/[email protected]/AppleACPIPCI/[email protected],2/AppleAHCI/PRT0 @0/[email protected]/AppleAHCIDiskDriver/IOAHCIBlockStorageDevice/IOBlockStorageDri ver/ST3160812AS P Media/IOGUIDPartitionScheme/[email protected]
    Apr 18 13:03:38 localhost kernel[0]: BSD root: disk0s2, major 14, minor 2
    Apr 18 13:03:38 localhost kernel[0]: jnl: replay_journal: from: 3560448 to: 7934976 (joffset 0x48b341000)
    Apr 18 13:03:38 localhost kernel[0]: HFS: Removed 9 orphaned unlinked files
    Apr 18 13:03:38 localhost kernel[0]: Jettisoning kernel linker.
    Apr 18 13:03:38 localhost kernel[0]: Resetting IOCatalogue.
    Apr 18 13:03:38 localhost kernel[0]: PXS1: family specific matching fails
    Apr 18 13:03:38 localhost kernel[0]: Matching service count = 1
    Apr 18 13:03:38 localhost kernel[0]: Matching service count = 2
    Apr 18 13:03:38 localhost kernel[0]: Matching service count = 2
    Apr 18 13:03:38 localhost kernel[0]: Matching service count = 2
    Apr 18 13:03:38 localhost kernel[0]: Matching service count = 2
    Apr 18 13:03:38 localhost kernel[0]: Matching service count = 2
    Apr 18 13:03:38 localhost kernel[0]: NVDANV40HAL loaded and registered.
    Apr 18 13:03:38 localhost kernel[0]: PXS1: family specific matching fails
    Apr 18 13:03:38 localhost kernel[0]: Previous Shutdown Cause: 3
    Apr 18 13:03:38 localhost kernel[0]: IPv6 packet filtering initialized, default to accept, logging disabled
    Apr 18 13:03:38 localhost mDNSResponder-108.4 (Jan 8 2007 20: 39:46)[30]: starting
    Apr 18 13:03:38 localhost memberd[38]: memberd starting up
    Apr 18 13:03:38 localhost DirectoryService[42]: Launched version 2.1 (v353.6)
    Apr 18 13:03:39 localhost lookupd[44]: lookupd (version 369.6) starting - Wed Apr 18 13:03:39 2007
    Apr 18 13:03:39 localhost kernel[0]: AppleIntel8254XEthernet: Ethernet address 00:17:f2:01:63:16
    Apr 18 13:03:39 localhost configd[34]: No AirPort Driver found.
    Apr 18 13:03:39 localhost kernel[0]: AppleIntel8254XEthernet: Ethernet address 00:17:f2:01:63:17
    Apr 18 13:03:39 localhost diskarbitrationd[37]: disk0s2 hfs FDAB59BA-2B84-3AD5-AF66-4BD8CFA20261 Macintosh HD /
    Apr 18 13:03:40 localhost lookupd[55]: lookupd (version 369.6) starting - Wed Apr 18 13:03:40 2007
    Apr 18 13:03:42 localhost kernel[0]: Intel8254x -- Link Up -- 00:17:f2:01:63:16 -- called by interruptOccurred() --
    Apr 18 13:03:42 localhost /System/Library/CoreServices/loginwindow.app/Contents/MacOS/loginwindow: Login Window Application Started
    Apr 18 13:03:42 localhost kernel[0]: -- Auto-Neg Advertise Reg (04d) = 0xde1, Link Partner Ability Reg (05d) = 0x41e1, Gig Advertise Reg (09d) = 0xe00, Gig Link Partner Ability Reg (10d) = 0x4000
    Apr 18 13:03:42 localhost mDNSResponder: Adding browse domain local.
    Apr 18 13:03:43 localhost loginwindow[62]: Login Window Started Security Agent
    Apr 18 13:03:46 localhost kernel[0]: Intel8254x -- Link down -- 00:17:f2:01:63:17 -- called by enableHardware() --
    Apr 18 13:03:46 localhost kernel[0]: -- Auto-Neg Advertise Reg (04d) = 0xde1, Link Partner Ability Reg (05d) = 0x0, Gig Advertise Reg (09d) = 0xe00, Gig Link Partner Ability Reg (10d) = 0x4000
    Apr 18 13:03:46 Alexs-Computer configd[34]: setting hostname to "Alexs-Computer.local"
    Apr 18 13:03:46 Alexs-Computer TabletDriver[71]: RunApplication called while eRelaunching
    Apr 18 13:03:52 Alexs-Computer configd[34]: executing /System/Library/SystemConfiguration/Kicker.bundle/Contents/Resources/enable-net work
    Apr 18 13:03:52 Alexs-Computer configd[34]: posting notification com.apple.system.config.network_change
    Apr 18 13:03:52 Alexs-Computer lookupd[82]: lookupd (version 369.6) starting - Wed Apr 18 13:03:52 2007
    Apr 18 13:03:52 Alexs-Computer ntpdate[94]: can't find host time.euro.apple.com\n
    Apr 18 13:03:52 Alexs-Computer ntpdate[94]: no servers can be used, exiting
    Apr 18 13:03:55 Alexs-Computer configd[34]: target=enable-network: disabled
    Apr 18 13:04:15 Alexs-Computer configd[34]: posting notification com.apple.system.config.network_change
    Apr 18 13:04:15 Alexs-Computer lookupd[148]: lookupd (version 369.6) starting - Wed Apr 18 13:04:15 2007
    Apr 18 13:04:15 Alexs-Computer SystemStarter[41]: "/Library/StartupItems/Tablet" failed security check: permissions
    Apr 18 13:04:17 Alexs-Computer kernel[0]: Parallels Workstation Hypervisor started.
    Apr 18 13:04:17 Alexs-Computer kernel[0]: Parallels Workstation VMM Main driver started.
    Apr 18 13:04:18 Alexs-Computer kernel[0]: comparallels_kextPvsvnic: Ethernet address 00:01:23:45:67:89
    Apr 18 13:04:19 Alexs-Computer SystemStarter[41]: Parallels VirtualMachine drivers (149) did not complete successfully
    Apr 18 13:08:25 localhost kernel[0]: hi mem tramps at 0xffe00000
    Apr 18 13:08:25 localhost kernel[0]: PAE enabled
    Apr 18 13:08:25 localhost kernel[0]: 64 bit mode enabled
    here couple more logs right at the moment of crash (found in paic.log). hopefully then can shed som elight on the troubles:
    pls advise
    Wed Apr 18 13:04:16 2007
    panic(cpu 0 caller 0x001A429B): Unresolved kernel trap (CPU 0, Type 14=page fault), registers:
    CR0: 0x8001003b, CR2: 0x00004000, CR3: 0x01019000, CR4: 0x000006e0
    EAX: 0x23a3d578, EBX: 0x00000000, ECX: 0x00001000, EDX: 0x00004000
    CR2: 0x00004000, EBP: 0x2544bc18, ESI: 0x23a3d578, EDI: 0x00004000
    EFL: 0x00010206, EIP: 0x0019637c, CS: 0x00000008, DS: 0x00000010
    Backtrace, Format - Frame : Return Address (4 potential args on stack)
    0x2544b9d8 : 0x128d08 (0x3cb134 0x2544b9fc 0x131de5 0x0)
    0x2544ba18 : 0x1a429b (0x3d0e4c 0x0 0xe 0x3d0670)
    0x2544bb28 : 0x19ada4 (0x2544bb40 0x23a39578 0x2544bb98 0x84ae50)
    0x2544bc18 : 0x84b148 (0x23a39000 0x2 0x2544bc68 0x1a1738)
    0x2544bc38 : 0x8393d4 (0x2544bddc 0x0 0x2544bc68 0x4b0000)
    0x2544bd18 : 0x6ca33a (0x23a39000 0x2544bdaa 0x2544bdaa 0x84)
    0x2544bd78 : 0x6be697 (0x3c34000 0x2544bdaa 0x2544bdaa 0x84)
    0x2544bdf8 : 0x6a72e3 (0x3c34000 0x1 0x2544be48 0x1a1738)
    0x2544be18 : 0x6aee4a (0x553f8000 0x0 0x3ff96a27 0x3d87)
    0x2544be78 : 0x546b55 (0x3c34000 0x2544beac 0x1 0x1a26ce)
    0x2544bec8 : 0x54a1d0 (0x3a21e00 0x3 0x3f60ddf8 0x3d87)
    0x2544bee8 : 0x54bc8d (0x3a21e00 0x7abf 0x5cbd220 0x5cbd160)
    0x2544bf28 : 0x39c536 (0x3a21e00 0x3a40280 0x8 0x2)
    0x2544bf78 : 0x13d7d9 (0x3a40280 0x3a87e78 0x0 0x0)
    0x2544bfc8 : 0x19ac1c (0x0 0x0 0x19e0b5 0x397fcec) Backtrace terminated-invalid frame pointer 0x0
    Kernel loadable modules in backtrace (with dependencies):
    com.apple.NVDAResman(4.5.2)@0x6c9000
    dependency: com.apple.iokit.IOPCIFamily(2.2)@0x5e0000
    dependency: com.apple.iokit.IOGraphicsFamily(1.4.5)@0x69f000
    dependency: com.apple.iokit.IONDRVSupport(1.4.5)@0x6ba000
    com.apple.iokit.IONDRVSupport(1.4.5)@0x6ba000
    dependency: com.apple.iokit.IOPCIFamily(2.2)@0x5e0000
    dependency: com.apple.iokit.IOGraphicsFamily(1.4.5)@0x69f000
    com.apple.iokit.IOGraphicsFamily(1.4.5)@0x69f000
    dependency: com.apple.iokit.IOPCIFamily(2.2)@0x5e0000
    com.apple.iokit.IOHIDFamily(1.4.10)@0x531000
    Kernel version:
    Darwin Kernel Version 8.9.1: Thu Feb 22 20:55:00 PST 2007; root:xnu-792.18.15~1/RELEASE_I386
    Wed Apr 18 17:06:26 2007
    panic(cpu 1 caller 0x001A429B): Unresolved kernel trap (CPU 1, Type 14=page fault), registers:
    CR0: 0x8001003b, CR2: 0x00004000, CR3: 0x01019000, CR4: 0x000006e0
    EAX: 0x23a4d578, EBX: 0x00000000, ECX: 0x00001000, EDX: 0x00004000
    CR2: 0x00004000, EBP: 0x25443c18, ESI: 0x23a4d578, EDI: 0x00004000
    EFL: 0x00010206, EIP: 0x0019637c, CS: 0x00000008, DS: 0x04080010
    Backtrace, Format - Frame : Return Address (4 potential args on stack)
    0x254439d8 : 0x128d08 (0x3cb134 0x254439fc 0x131de5 0x0)
    0x25443a18 : 0x1a429b (0x3d0e4c 0x1 0xe 0x3d0670)
    0x25443b28 : 0x19ada4 (0x25443b40 0x23a49578 0x1 0x4065004)
    0x25443c18 : 0x84b148 (0x23a49000 0x2 0x25443c48 0x713bbf)
    0x25443c38 : 0x8393d4 (0x25443ddc 0x0 0x25443c68 0x7116c2)
    0x25443d18 : 0x6ca33a (0x23a49000 0x25443daa 0x25443daa 0x84)
    0x25443d78 : 0x6be697 (0x3c61c00 0x25443daa 0x25443daa 0x84)
    0x25443df8 : 0x6a72e3 (0x3c61c00 0x2 0x25443e28 0x1e)
    0x25443e18 : 0x6aee4a (0x523e0000 0x0 0xfd8e30e2 0xc93)
    0x25443e78 : 0x546b55 (0x3c61c00 0x25443eac 0x2 0x1a26ce)
    0x25443ec8 : 0x54a1d0 (0x3a21e00 0x3 0xfcf5a332 0xc93)
    0x25443ee8 : 0x54bc8d (0x3a21e00 0x1917 0x4336be0 0x4336b20)
    0x25443f28 : 0x39c536 (0x3a21e00 0x3a40280 0x8 0x2)
    0x25443f78 : 0x13d7d9 (0x3a40280 0x3a39ff8 0x0 0x3303)
    0x25443fc8 : 0x19ac1c (0x0 0x0 0x19e0b5 0x5cb2144) Backtrace terminated-invalid frame pointer 0x0
    Kernel loadable modules in backtrace (with dependencies):
    com.apple.NVDAResman(4.5.2)@0x6c9000
    dependency: com.apple.iokit.IOPCIFamily(2.2)@0x5e0000
    dependency: com.apple.iokit.IOGraphicsFamily(1.4.5)@0x69f000
    dependency: com.apple.iokit.IONDRVSupport(1.4.5)@0x6ba000
    com.apple.iokit.IONDRVSupport(1.4.5)@0x6ba000
    dependency: com.apple.iokit.IOPCIFamily(2.2)@0x5e0000
    dependency: com.apple.iokit.IOGraphicsFamily(1.4.5)@0x69f000
    com.apple.iokit.IOGraphicsFamily(1.4.5)@0x69f000
    dependency: com.apple.iokit.IOPCIFamily(2.2)@0x5e0000
    com.apple.iokit.IOHIDFamily(1.4.10)@0x531000
    Kernel version:
    Darwin Kernel Version 8.9.1: Thu Feb 22 20:55:00 PST 2007; root:xnu-792.18.15~1/RELEASE_I386

    ok so i experimented a little with the hardware and here what i have to the moment:
    1. i thought that the usb kb could be the case for mac os to crash so i disconnected the cable from the KVM and plugged normal apple kb to the mac.
    2. however when i tried switching back to mac, the machine crashed again.
    from what i noticed for the last few days 'working' with this kvm switch was the screen resolution changing while i was switching. meaning the screen flickered for couple of times prior to showing 1280x1024 that was set up in the system. during flickering the resoution became 1024x768. i 've seen it pretty clearly, just it was for half of a second.
    also when powering up both machines, they were starting with 1024x768 and not 1280x1024 as was set up. i had to manually change the screen resolution on both machines (pc and mac) every time after successful start up.
    so by far my understanding is that kvm switch forces monitor for 1024x768 during switches and on start up. it also causes the OSes (win2K and MacOSX) to lose 1280x1024 and accept 1024x768 as if the monitor was changed and couldn't operate at a higher resolution.
    having said that i uploaded this info to kvm mfg (ATEN) and couple more mac forums so that this info may help someone else when ordering a kvm for mac. at the same time i am still open for any thoughts, advices and crazy ideas to get round this bug.
    alex

  • How to use multiple closed MBPs with KVM?

    I have an unusual problem I'd eagerly welcome help with:
    I have four MacBook Pros (from 2006-2010) that I use in my day-to-day work, since each of them can run an instance of the client software I work on.
    As you imagine, this consumes a fair amount of desk space having them side-by-side, as well as the seeming redundancy of having each one's screen showing, since I actually only need to focus on one at a time (commanding it to do tasks I can background for awhile). In addition, I prefer to use the mouse over the trackpad whenever possible.
    So I had an inspired idea: I read that you can run a MBP in closed clamshell mode while hooked to an external display. That got me thinking, hmmm, what if I stacked these MBPs in one pile and connected them all to a 4-port KVM, so I could share a monitor, keyboard, and mouse among them?
    Then I saw the prices of some 4-port KVMs, and they get fairly pricey, so I'd like to learn from others' experiences on the following specific questions:
    Are there heat issues I need to be concerned about? The software I work with tends to ramp up a MBP's fans pretty loud.
    Are there KVMs that are known to work best with this config? Some seem more Mac-friendly than others but the ones I'm looking at (Gefen, IOGear) all get mixed reviews thus far. 4 computers sharing 1 DVI display + USB keyboard and mouse seems fine, as 4 sharing 2 seems to jack up the price a lot more, and I don't have a specific need for two monitors.
    I've previously gleaned some info about MBPs with KVMs, but haven't come across a setup like the one I'm suggesting. Thanks so much in advance!

    I'd say that you ought to look at using class and id attributes in your table elements.
    If you have two tables and want seperate color schemes use an id on the <table> element.  Then you can select that table in your CSS quite easily.
    <table id="greenScheme">
    <table id="blueScheme">
    #greenScheme tr {
    One set of rules here
    #blueScheme tr {
    Another set of rules here
    I don't/haven't used tables that much myself so don't feel confident about writing out some sample CSS for you here.  However, it shouldn't be too difficult to work out.  Also, I did a fancy table not long ago to put up a price table in a site.  A quick google on something like style tables CSS will bring up plenty of tutorial type stuff on styling tables that won't be too arduous.
    Martin
    Tricia0131 wrote:
    searched this site and found this question many times, but all answers suggest how to do it in CSS code.
    That might be because it's the best way to do it ;-)

  • I have 2 old computers(both XP) now connected with a KVM switch, both have same version of FF (11.0) but different profiles, bookmarks & addons. How can easily I make them both the same?

    #2 has many years of bookmarks and profiles, #1 is only 3 months old. I would like them both to run the same add-ons and have same profiles. How can I integrate the old to the new and the new to the old? Both are up and running fine. I got the KVM because one has MS Office 7, but couldn't afford to put it on the other one. They also both connect wirelessly to the router which is in the next room (my brother's as he's a gamer and needs a faster connection), so they aren't set up as a regular network although I log on with a password. I'd like to be able to put the entire profile once integrated on a flash drive. Thanks.

    Firefox '''Sync''' can synchronize your Profiles. <br />
    https://support.mozilla.com/en-US/kb/what-firefox-sync

  • Can't boot virtio-guest with KVM since kvm-86

    Hello,
    since kvm-86 I can't boot a Debian Lenny guest machine. When I boot the machine I get the following error:
    [ 4.117315] request_module: runaway loop modprobe binfmt-a6e0
    [ 4.119330] request_module: runaway loop modprobe binfmt-a6e0
    [ 4.121357] request_module: runaway loop modprobe binfmt-a6e0
    [ 4.123321] request_module: runaway loop modprobe binfmt-a6e0
    [ 4.125318] request_module: runaway loop modprobe binfmt-a6e0
    [ 134.220057] INFO: task run-init:1 blocked for more than 120 seconds.
    [ 134.221809] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
    [ 134.224125] run-init D 00000003 0 1 0
    [ 134.225588] d7c3f8a0 00000082 d7c3f8a0 00000003 f4c7cbb7 00000000 d7c3fa2c 00000001
    [ 134.228196] 00000000 7fffffff d7c41ef0 d7c41edc 00000002 c02a61ab 00000000 d7c4bfbc
    [ 134.230567] d7c133bc c0115f16 00000000 00000003 d7c133c8 d7c133c8 00000002 00000000
    [ 134.233429] Call Trace:
    [ 134.234227] [<c02a61ab>] schedule_timeout+0x13/0x86
    [ 134.235780] [<c0115f16>] __wake_up_common+0x2d/0x52
    [ 134.237320] [<c011918a>] __wake_up+0x27/0x38
    [ 134.238596] [<c02a5c2f>] wait_for_common+0xa3/0xfd
    [ 134.240132] [<c0117195>] default_wake_function+0x0/0x5
    [ 134.241734] [<c0126e90>] call_usermodehelper_exec+0x57/0x96
    [ 134.243493] [<c0127120>] request_module+0xcc/0xdc
    [ 134.244775] [<c016869a>] get_arg_page+0x2a/0x79
    [ 134.246263] [<c0168a83>] search_binary_handler+0x169/0x17c
    [ 134.248025] [<c0169807>] do_execve+0x12b/0x1b6
    [ 134.249406] [<c0102138>] sys_execve+0x2a/0x49
    [ 134.250763] [<c01037b2>] syscall_call+0x7/0xb
    I tried to reinstall the machine, but during the install process the installer isn't able to create a swap partition.  Later, I got the error message "stale NFS file handle" at the console (I don't do anything with nfs here). Same errors with kvm-87 and 88.
    I tried to install other distros, but any of them failed to install on the virtio disk one way or another.
    Everything works with kvm-84. With kvm-85 libvirt (which I am using)  wasn't able to boot from a virtio disk.  Note that libvirt has nothing to do with the error/bug described above. This happens since kvm-86 with plain kvm started from the command line, too.
    I am switching back to kvm-84 for now.
    To reproduce:
    Get a Debian Lenny qemu/KVM image and virtio disk and try to boot it. Or try to install Debian Lenny on a virtio disk. There were other errors with other Distros, so I suspect that there is somesthing wrong with kvm since 86.
    # uname -r
    2.6.30-ARCH
    # lsmod|grep kvm
    kvm_amd
    kvm
    /proc/cpuinfo:
    processor : 0
    vendor_id : AuthenticAMD
    cpu family : 15
    model : 75
    model name : AMD Athlon(tm) 64 X2 Dual Core Processor 4600+
    stepping : 2
    cpu MHz : 2400.299
    cache size : 512 KB
    physical id : 0
    siblings : 2
    core id : 0
    cpu cores : 2
    apicid : 0
    initial apicid : 0
    fdiv_bug : no
    hlt_bug : no
    f00f_bug : no
    coma_bug : no
    fpu : yes
    fpu_exception : yes
    cpuid level : 1
    wp : yes
    flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt rdtscp lm 3dnowext 3dnow extd_apicid pni cx16 lahf_lm cmp_legacy svm extapic cr8_legacy
    bogomips : 4802.62
    clflush size : 64
    power management: ts fid vid ttp tm stc
    Last edited by haary (2009-08-12 23:34:59)

    I am also having the same problem, the host is Archlinux with kvm-88 on 64bit, I am going to try aur and see how it goes when I get home.
    There is no updated aur package so downgrade it is.
    KVM 84 didn't work YES!!!
    Last edited by mthode (2009-08-18 02:01:22)

  • KVM switch and Mavericks don't play well together

    I upgraded to Mavericks yesterday, and started having this very annoying problem with my KVM switch, which used to work fine with Mountain Lion. I've been using this KVM switch for my mac mini and PC, in order to share my keyboard and mouse, very stably for several months.
    Basically, when switching back and forth, there is a chance that ALL the peripheral devices would stop working in Mavericks. This includes my apple bluetooth keyboard and the magic touchpad, which are not related with USB (or maybe the bluetooth chip is still hooked up via USB inside).
    For some reason, screen sharing stops working too, althought the IP I was trying to connect to was the ethernet port.
    If I try to do a shutdown -r now via SSH, the system tries to shut itself down, but would get stuck with a spinning animation on the screen.
    There is nothing in the system log, no error message.
    My KVM switch is an IOGear GCS42UW6. Connected USB devices are: Apple USB keyboard and Logitech G500 mouse.

    10.8 worked well with my Mac Mini (2009) connected to IOGEAR KVM model GCS1108. My mouse is from Redmond and the keyboard is a Goldtouch.
    Mavericks has a problem with my KVM switch as well. It seems to be a USB problem.
    Case 1: The Mini's video is connected to the KVM switch -- mini DVI port to DVI. If the KVM USB cable (known good) is connected, the Mini chimes at boot but no grey Apple logo appears. LCD remains blank white. Boot does not progress.
    Case 2: The Mini's video is connected to the KVM switch, as before. If the KVM USB cable is NOT connected, the Mini chimes at boot, the grey logo appears, and boot proceeds normally. Video is fine. I  then connect the KVM USB cable to the Mini and use keyboard and mouse. KVM switching works as expected.
    If the KVM USB cable is NOT connected but a keyboard and mouse are connected directly to the Mini, the boot sequence is normal. Video works.
    The problem is not the hardware, all of which worked well with 10.8 (Mountain Lion). I would downgrade if Apple made 10.8 available from the App Store.

  • KVM VGA-Passthrough using the new vfio-vga support in kernel = 3.9

    This is intented for people who wish to pass-through a GPU to a virtual machine using the KVM hypervisor, QEMU and vfio-pci
    NOTE: AMD RADEON 5xxx, 6xxx, 7xxx, 2xx and NVIDIA GEFORCE 7, 8, 4xx, 5xx, 6xx, 7xx 9xx have been reported working with this, passing though an intel IGD is not supported YET
    NOTE: THIS IS EXPERIMENTAL SO IT MIGHT NOT WORK ON YOUR SYSTEM
    This is the result on my radeon 6950:
    This is the result on my geforce 470 gtx:
    Recommended reads
    Alex Williamson's blog and FAQ for detailed technical information
    OVMF whitepaper.
    GPU passthrough database by noctavian
    At this moment there are two ways to achieve this using KVM: legacy VGA via Seabios or non-VGA (UEFI) via OVMF
    The main practical advantage of using OVMF is that on intel systems you no longer need the i915 VGA arbiter patch which also disables DRI on the host
    Requirements
    AMD-VI/VT-D enabled and working (On intel systems both your MB and you CPU must support it, to find out if you CPU has VT-D support go here: http://ark.intel.com/, you also need to boot with intel_iommu=on to enable it)
    At least 2 GPU's, one primary boot device and the card you wish to pass-through
    Qemu=>2.0
    Aditional kernel patches might be required if you're using an Intel CPU: ACS override patch and i915 VGA arbiter patch, you can find a kernel package with these patches included on AUR: linux-vfio
    Aditional requirements for OVMF:
    An UEFI compatible GPU (Most modern gpus support this, SEE: Does my graphics card ROM support EFI?
    An UEFI compatible GUEST (ex: Windows 7 and up)
    OVMF:  Gerd Hoffmann's rpms or OVMF-svn from AUR
    If you're building your kernel manually this option is required:
    CONFIG_VFIO_PCI_VGA=y
    Preparing your System
    On intel system the i915 VGA arbiter patch is required if:
    You're using the IGD on your host
    You're doing VGA assignment
    NOTE: Enabling this will disable DRI!
    If you wish to avoid this, then then you should try OVMF
    To enable it add this kernel parameter to your bootloader:
    i915.enable_hd_vgaarb=1
    Next, we need to prepare the GPU for vfio:
    Blacklist radeon or nouveau or nvidia or fglrx on /etc/modprobe.d/blacklist.conf
    Example, blacklisting the opensource radeon module:
    echo "blacklist radeon" >> /etc/modprobe.d/blacklist.conf
    Use pci-stub
    In my case since i have 2 radeon cards blacklisting the radeon module is not an option, so i use pci-stub
    NOTE: If pci-stub was built as a module, you'll need to modify /etc/mkinitcpio.conf and add pci-stub in the MODULES section, after that you need to update your initramfs like this
    mkinitcpio -p linux-mainline
    lspci
    07:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Cayman PRO [Radeon HD 6950] <-- radeon 6950
    07:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Cayman/Antilles HDMI Audio [Radeon HD 6900 Series] <-- radeon 6950 audio
    lspci -n
    07:00.0 0300: 1002:6719 <-- radeon 6950
    07:00.1 0403: 1002:aa80 <-- radeon 6950 audio
    Now add this kernel parameter to your bootloader:
    pci-stub.ids=1002:6719,1002:aa80
    dmesg | grep pci-stub
    [ 2.096151] pci-stub: add 1002:6719 sub=FFFFFFFF:FFFFFFFF cls=00000000/00000000
    [ 2.096160] pci-stub 0000:07:00.0: claimed by stub
    [ 2.096165] pci-stub: add 1002:AA80 sub=FFFFFFFF:FFFFFFFF cls=00000000/00000000
    [ 2.096174] pci-stub 0000:07:00.1: claimed by stub
    [ 2.096178] pci-stub: add 1B21:1042 sub=FFFFFFFF:FFFFFFFF cls=00000000/00000000
    Setting up vfio and kvm modules
    This is only required if you get this message:
    vfio_iommu_type1_attach_group: No interrupt remapping support. Use the module param "allow_unsafe_interrupts" to enable VFIO IOMMU support on this platform
    If your board doesn't enable interrupt remapping, you need to add this to your bootloader:
    vfio_iommu_type1.allow_unsafe_interrupts=1
    Or if vfio-pci was built as a module ( default on arch )
    echo "options vfio_iommu_type1 allow_unsafe_interrupts=1" > /etc/modprobe.d/vfio_iommu_type1.conf
    Some applications like Passmark Performance Test and SiSoftware Sandra crash the VM without this:
    echo "options kvm ignore_msrs=1" >> /etc/modprobe.d/kvm.conf
    Binding a device to vfio-pci
    We'll use this script to make life easier:
    #!/bin/bash
    modprobe vfio-pci
    for dev in "[email protected]"; do
    vendor=$(cat /sys/bus/pci/devices/$dev/vendor)
    device=$(cat /sys/bus/pci/devices/$dev/device)
    if [ -e /sys/bus/pci/devices/$dev/driver ]; then
    echo $dev > /sys/bus/pci/devices/$dev/driver/unbind
    fi
    echo $vendor $device > /sys/bus/pci/drivers/vfio-pci/new_id
    done
    Save it as /usr/bin/vfio-bind
    chmod 755 /usr/bin/vfio-bind
    Bind the GPU and GPU audio:
    vfio-bind 0000:07:00.0 0000:07:00.1
    Systemd service:
    [Unit]
    Description=Binds devices to vfio-pci
    After=syslog.target
    [Service]
    EnvironmentFile=-/etc/vfio-pci.cfg
    Type=oneshot
    RemainAfterExit=yes
    ExecStart=-/usr/bin/vfio-bind $DEVICES
    [Install]
    WantedBy=multi-user.target
    cat /etc/vfio-pci.cfg
    DEVICES="0000:00:11.0 0000:04:00.0 0000:05:00.0 0000:06:00.0 0000:07:00.0 000:07:00.1"
    Testing if its working out
    Seabios:
    qemu-system-x86_64 -enable-kvm -m 1024 -cpu host,kvm=off \
    -smp 4,sockets=1,cores=4,threads=1 \
    -device vfio-pci,host=07:00.0,x-vga=on -device vfio-pci,host=07:00.1 \
    -vga none
    OVMF:
    qemu-system-x86_64 -enable-kvm -m 1024 -cpu host,kvm=off  \
    -smp 4,sockets=1,cores=4,threads=1 \
    -drive if=pflash,format=raw,readonly,file=/usr/share/ovmf/x64/ovmf_code_x64.bin \
    -drive if=pflash,format=raw,file=/usr/share/ovmf/x64/ovmf_vars_x64.bin \
    -device vfio-pci,host=07:00.0 -device vfio-pci,host=07:00.1 \
    -vga none
    Note:
    kvm=off will hide the kvm hypervisor signature, this is required for NVIDIA cards, since its driver will refuse to work on an hypervisor and result in Code 43 on windows (unless you're using a QUADRO)
    x-vga=on is required for vga assignment
    -vga none disables the default vga device on QEMU, it is also required for vga assignment
    You should see a black qemu window on your main display, and seabios/ovmf ouput on your monitor from your passthru'd card saying it cant find anything to boot
    If you're using an intel cpu and nothing happens try this:
    modprobe -r kvm_intel
    modprobe kvm_intel emulate_invalid_guest_state=0
    NOTE: There might be some problems using nvidia/fglrx/nouveau drivers on the host gpu, see the ISSUES section below on how to solve this
    At this point you're ready to create your vm, you could use libvirt + virt-manager to create your vm using a nice graphical interface, there are
    also some interesting examples in this thread, otherwise if you prefer to use the command line continue reading
    DISK:
    Creating a disk image:
    Create a 30Gb raw image:
    dd if=/dev/zero of=windows.img bs=1M seek=30000 count=0
    Using a VIRTIO controller:
    We create our virtio controller for qemu:
    -device virtio-scsi-pci,id=scsi
    Attaching our hdd:
    -drive file=/home/nbhs/windows.img,id=disk,format=raw,if=none -device scsi-hd,drive=disk
    Attaching a cdrom:
    -drive file=/home/nbhs/windows.iso,id=isocd,if=none -device scsi-cd,drive=isocd
    To install windows, you'll need to download the virtio drivers iso from here
    Attaching the virtio iso:
    -drive file=/home/nbhs/virtio.iso,id=virtiocd,if=none -device ide-cd,bus=ide.1,drive=virtiocd
    Windows will complain it cant find a disk to install to, just click browse, find the folder for your os/arch, select "RED HAT VirtIO pass-through controller" then click next.
    For more info check out the Archlinux wiki's QEMU section
    Using a physical disk or partition:
    -drive file=/dev/sdb,id=disk,format=raw,if=none -device scsi-hd,drive=disk
    You might need to change the bus depending on the controller you use
    If you wish to use a physical partition and be able to read its contents later on, you can follow these guides:
    http://fds-team.de/cms/articles/2013-12 … yer-u.html
    https://wiki.archlinux.org/index.php/QE … disk_image
    Passing a sata disk controller to qemu:
    If you dual boot like me you can pass an entire sata controller (in ahci mode) and all the drives attached, and seabios will boot from them.
    lspci
    00:11.0 SATA controller: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 SATA Controller [AHCI mode] (rev 40)
    Make sure all volumes are unmounted, then bind the controller to vfio:
    vfio-bind 0000:00:11.0
    Now we pass the controller to the vm:
    -device vfio-pci,host=00:11.0
    USB:
    Its also possible to passthrough a usb controller, in my case an ASMEDIA USB3 Controller:
    lspci
    04:00.0 USB controller: ASMedia Technology Inc. ASM1042 SuperSpeed USB Host Controller
    05:00.0 USB controller: ASMedia Technology Inc. ASM1042 SuperSpeed USB Host Controller
    06:00.0 USB controller: ASMedia Technology Inc. ASM1042 SuperSpeed USB Host Controller
    Bind them to vfio:
    vfio-bind 0000:04:00.0 0000:05:00.0 0000:06:00.0
    Pass them to the vm:
    -device vfio-pci,host=04:00.0 \
    -device vfio-pci,host=05:00.0 \
    -device vfio-pci,host=06:00.0
    Or a specific device:
    lsusb
    Bus 004 Device 010: ID 045e:00e1 Microsoft Corp. Wireless Laser Mouse 6000 Reciever <-- mouse
    Bus 004 Device 011: ID 045e:074b Microsoft Corp. <-- keyboard
    We pass them to the vm:
    -usb -usbdevice host:045e:00e1 -usbdevice host:045e:074b
    NETWORK:
    Please see https://wiki.archlinux.org/index.php/QEMU#Networking
    AUDIO EMULATION:
    To hear the sound from the vm on your host speakers you'll need to add this lines:
    -soundhw hda
    You might need to start qemu like this:
    QEMU_PA_SAMPLES=128 QEMU_AUDIO_DRV=pa qemu-system-x86_64...
    alsa:
    QEMU_ALSA_DAC_BUFFER_SIZE=512 QEMU_ALSA_DAC_PERIOD_SIZE=170 QEMU_AUDIO_DRV=alsa qemu-system-x86_64...
    Note: these are the settings i found that work great on my system, if you get crackling/skipping audio you might want to try different settings
    To see the available drivers and audio options:
    qemu-system-x86_64 -audio-help
    LOADING YOUR CARD ROM FROM A DUMP/FILE:
    modify this line:
    -device vfio-pci,host=07:00.0,...... \
    change it to this:
    -device vfio-pci,host=07:00.0,......,romfile=/path/to/your/gpu/bios.bin \
    ISSUES:
    Using the latest NVIDIA drivers on the guest will result in code 43, but there's a workarround
    Using the latest NVIDIA drivers on the guest using hv enlightenments will result in code 43, see: https://forums.geforce.com/default/topi … 8/#4314318
    Using AMD proprieraty drivers on the host, see: https://bbs.archlinux.org/viewtopic.php … 2#p1273412 the only solution atm is using the opensource radeon driver
    PERFORMANCE IMPROVEMENTS:
    SEE: https://bbs.archlinux.org/viewtopic.php … 1#p1270311
    Pin vcpu to pcpu, see http://www.linux-kvm.com/content/tip-ru … cific-cpus
    Use cgroups, specifically cpuset, see https://access.redhat.com/site/document … puset.html
    Use Hugepages, see http://pic.dhe.ibm.com/infocenter/lnxin … ttunhp.htm
    Use Hyper-V enlightenments, see: http://blog.wikichoon.com/2014/07/enabl … h-kvm.html
    Last edited by nbhs (2015-04-05 20:01:18)

    nbhs wrote:
    apoapo wrote:
    I finally got some progress.
    After trying mainline kernel and with vbios, I went to bios/uefi and turned the Primary VGA card from onboard to pci-express ...
    Now I see the seabios in passthroughed screen, but with blinking cursor in it, so i will try some things .
    NIce! have you tried running windows with it yet? does it work if you dont load the rom file by hand?
    Hi,
    I tried it again and I captured this error message if I use the PCI-e card es Primary Card:
    qemu-system-x86_64: -device vfio-pci,host=01:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on: VFIO 0000:01:00.0 BAR 0 mmap unsupported. Performance may be slow
    This was, when I got some seabios picture.
    After some reboots I wanted to try it again, I was spammed with errors . Dont have them to show you now...  will look for it.
    Now I'm With the onboard as primary Card and I found this in dmesg:
    [ 0.401391] DMAR: No ATSR found
    [ 0.401412] IOMMU 0 0xfed90000: using Queued invalidation
    [ 0.401413] IOMMU 1 0xfed91000: using Queued invalidation
    [ 0.401415] IOMMU: Setting RMRR:
    [ 0.401422] IOMMU: Setting identity map for device 0000:00:02.0 [0xbf800000 - 0xcf9fffff]
    [ 0.402590] IOMMU: Setting identity map for device 0000:00:1d.0 [0xbd568000 - 0xbd59afff]
    [ 0.402606] IOMMU: Setting identity map for device 0000:00:1a.0 [0xbd568000 - 0xbd59afff]
    [ 0.402619] IOMMU: Setting identity map for device 0000:00:14.0 [0xbd568000 - 0xbd59afff]
    [ 0.402628] IOMMU: Prepare 0-16MiB unity mapping for LPC
    [ 0.402635] IOMMU: Setting identity map for device 0000:00:1f.0 [0x0 - 0xffffff]
    [ 0.402717] PCI-DMA: Intel(R) Virtualization Technology for Directed I/O
    [ 0.402782] ------------[ cut here ]------------
    [ 0.402786] WARNING: at drivers/pci/search.c:46 pci_find_upstream_pcie_bridge+0x83/0x90()
    [ 0.402787] Hardware name: To Be Filled By O.E.M.
    [ 0.402788] Modules linked in:
    [ 0.402790] Pid: 1, comm: swapper/0 Not tainted 3.9.2-1-mainline #1
    [ 0.402791] Call Trace:
    [ 0.402796] [<ffffffff81058090>] warn_slowpath_common+0x70/0xa0
    [ 0.402797] [<ffffffff8105817a>] warn_slowpath_null+0x1a/0x20
    [ 0.402799] [<ffffffff8129ea43>] pci_find_upstream_pcie_bridge+0x83/0x90
    [ 0.402802] [<ffffffff813b3c7b>] intel_iommu_add_device+0x4b/0x1f0
    [ 0.402805] [<ffffffff813ab630>] ? bus_set_iommu+0x50/0x50
    [ 0.402806] [<ffffffff813ab65a>] add_iommu_group+0x2a/0x50
    [ 0.402809] [<ffffffff8135bf63>] bus_for_each_dev+0x63/0xa0
    [ 0.402811] [<ffffffff813ab622>] bus_set_iommu+0x42/0x50
    [ 0.402814] [<ffffffff819130b6>] intel_iommu_init+0xa83/0xb7b
    [ 0.402816] [<ffffffff818dd10b>] ? memblock_find_dma_reserve+0x124/0x124
    [ 0.402818] [<ffffffff818dd11d>] pci_iommu_init+0x12/0x3c
    [ 0.402820] [<ffffffff8100210a>] do_one_initcall+0x10a/0x160
    [ 0.402823] [<ffffffff818d5037>] kernel_init_freeable+0x15b/0x1dc
    [ 0.402824] [<ffffffff818d4881>] ? do_early_param+0x88/0x88
    [ 0.402827] [<ffffffff814b55f0>] ? rest_init+0x90/0x90
    [ 0.402828] [<ffffffff814b55fe>] kernel_init+0xe/0x190
    [ 0.402830] [<ffffffff814dad6c>] ret_from_fork+0x7c/0xb0
    [ 0.402832] [<ffffffff814b55f0>] ? rest_init+0x90/0x9

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