Frequent segfaults caused by gpu

Everything seems stable on start up but as programs run longer they become more likely to segfault. Tabs in chromium begin to segfault constantly and Firefox crashes almost as soon as its opened and all other programs crash but more sporadically. I am not sure how to resolve this or even determine if its hardware failing or a driver problem. I also cant think of any specific update this behavior coincided with.
journalctl
Mar 30 20:27:09 localhost kernel: [drm] stuck on render ring
Mar 30 20:27:09 localhost kernel: [drm] stuck on blitter ring
Mar 30 20:27:09 localhost kernel: [drm] GPU crash dump saved to /sys/class/drm/card0/error
Mar 30 20:27:09 localhost kernel: [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.
Mar 30 20:27:09 localhost kernel: [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel
Mar 30 20:27:09 localhost kernel: [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue.
Mar 30 20:27:09 localhost kernel: [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it.
Mar 30 20:35:50 localhost kernel: [drm] stuck on render ring
Mar 30 21:03:09 localhost kernel: perf samples too long (5013 > 4990), lowering kernel.perf_event_max_sample_rate to 25200
Mar 30 21:33:19 localhost kernel: [drm] stuck on render ring
Mar 30 21:33:19 localhost kernel: [drm] stuck on blitter ring
Mar 30 21:54:33 localhost kernel: chromium[3277]: segfault at 382694104228 ip 00007fb789250850 sp 00007fffeff00968 error 4 in chromium[7fb787a9f000+535e000]
Mar 30 21:55:31 localhost kernel: chromium[3288]: segfault at 372b5c504120 ip 00007fb7893ab5ec sp 00007fffeff001b0 error 4 in chromium[7fb787a9f000+535e000]
Mar 30 21:55:35 localhost kernel: chromium[3202]: segfault at 3387e7ded2a8 ip 00007fb78bab8481 sp 00007fffeff01210 error 4 in chromium[7fb787a9f000+535e000]
Mar 30 21:57:10 localhost kernel: chromium[3311]: segfault at 3a8e6e00018 ip 00007fb789326320 sp 00007fffeff00af0 error 4 in chromium[7fb787a9f000+535e000]
Mar 30 22:06:25 localhost systemd-coredump[3377]: Core too large, core will not be stored.
Mar 30 22:06:25 localhost systemd-coredump[3377]: Process 512 (firefox) dumped core.
Mar 30 22:14:40 localhost kernel: chromium[3069]: segfault at 3279a2c0422b ip 00007fb78929ec12 sp 00007fffeff00cf0 error 4 in chromium[7fb787a9f000+535e000]
Mar 30 23:25:20 localhost kernel: chromium[3817]: segfault at bf4c2b088c3 ip 00007fb7892b5ddd sp 00007fffefeff450 error 4 in chromium[7fb787a9f000+535e000]
Mar 30 23:44:09 localhost kernel: [drm] stuck on render ring
Mar 30 23:44:09 localhost kernel: [drm] stuck on blitter ring
Mar 30 23:47:02 localhost kernel: chromium[4453]: segfault at 17a1bc681a20 ip 00003795c7384b5f sp 00007ffffff5ae20 error 4
Mar 30 23:47:54 localhost org.gtk.Private.UDisks2VolumeMonitor[406]: ### debug: Name owner ':1.0' vanished
Mar 30 23:56:07 localhost kernel: [drm] stuck on render ring
Mar 30 23:56:07 localhost kernel: [drm] stuck on blitter ring
Mar 30 23:57:56 localhost kernel: [drm:ring_stuck] *ERROR* Kicking stuck semaphore on render ring
Mar 30 23:59:12 localhost kernel: OptimizingCompi[4442]: segfault at 22b26f3581e8 ip 00007f74e550ffd6 sp 00007f74cf35f820 error 4 in chromium[7f74e3c63000+535e
Mar 31 11:30:00 localhost kernel: sd_festival[2074]: segfault at 2d0 ip 00007f39797181a1 sp 00007fffa4a23620 error 4 in libpthread-2.19.so[7f397970b000+18000]
Mar 31 11:30:00 localhost systemd-coredump[2075]: Process 2074 (sd_festival) dumped core.
Mar 31 11:42:19 localhost kernel: hda-intel 0000:00:1b.0: Unstable LPIB (130816 >= 8192); disabling LPIB delay counting
Mar 31 12:39:25 localhost kernel: chromium[3933]: segfault at 7 ip 00007f3c68d85850 sp 00007fff2eb122e8 error 4 in chromium[7f3c675d4000+535e000]
Mar 31 12:39:29 localhost kernel: traps: chromium[3944] trap int3 ip:7f3c69039db1 sp:7fff2eb10090 error:0
Mar 31 12:39:33 localhost kernel: chromium[3954]: segfault at 336f41100019 ip 00007f3c68ea4f44 sp 00007fff2eb120d0 error 4 in chromium[7f3c675d4000+535e000]
Mar 31 12:39:36 localhost kernel: chromium[3964]: segfault at 3cbf7ade94c8 ip 00007f3c68eb892d sp 00007fff2eb0f9b0 error 4 in chromium[7f3c675d4000+535e000]
Mar 31 12:39:39 localhost kernel: chromium[3974]: segfault at 21386a114618 ip 00007f3c68b5994e sp 00007fff2eb10990 error 4 in chromium[7f3c675d4000+535e000]
Mar 31 12:41:39 localhost systemd-coredump[4014]: Core too large, core will not be stored.
Mar 31 12:41:39 localhost systemd-coredump[4014]: Process 2445 (firefox) dumped core.
dmesg
[ 2613.072555] [drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off
[ 2708.304598] fuse init (API version 7.22)
[ 9735.567941] sd_festival[2074]: segfault at 2d0 ip 00007f39797181a1 sp 00007fffa4a23620 error 4 in libpthread-2.19.so[7f397970b000+18000]
[10475.945708] hda-intel 0000:00:1b.0: Unstable LPIB (130816 >= 8192); disabling LPIB delay counting
[11723.649327] perf samples too long (2504 > 2500), lowering kernel.perf_event_max_sample_rate to 50100
[13905.253065] chromium[3933]: segfault at 7 ip 00007f3c68d85850 sp 00007fff2eb122e8 error 4 in chromium[7f3c675d4000+535e000]
[13909.634254] traps: chromium[3944] trap int3 ip:7f3c69039db1 sp:7fff2eb10090 error:0
[13913.730004] chromium[3954]: segfault at 336f41100019 ip 00007f3c68ea4f44 sp 00007fff2eb120d0 error 4 in chromium[7f3c675d4000+535e000]
[13915.862660] chromium[3964]: segfault at 3cbf7ade94c8 ip 00007f3c68eb892d sp 00007fff2eb0f9b0 error 4 in chromium[7f3c675d4000+535e000]
[13919.066996] chromium[3974]: segfault at 21386a114618 ip 00007f3c68b5994e sp 00007fff2eb10990 error 4 in chromium[7f3c675d4000+535e000]
[14215.534298] chromium[977]: segfault at 2000000000 ip 0000002000000000 sp 00007fff692bfa08 error 14
[14217.307167] systemd-journald[111]: Failed to write entry (26 items, 386401146 bytes) despite vacuuming, ignoring: Argument list too long
[14509.223324] chromium[4025]: segfault at da8c6900018 ip 00007f3c68e5b320 sp 00007fff2eb12e50 error 4 in chromium[7f3c675d4000+535e000]
[14519.290360] chromium[4121]: segfault at 18 ip 00007f3c68e5b320 sp 00007fff2eb12390 error 4 in chromium[7f3c675d4000+535e000]
[14604.753564] chromium[4151]: segfault at 2cbeb1c39c98 ip 00007f3c68d8f048 sp 00007fff2eb12710 error 4 in chromium[7f3c675d4000+535e000]
[16026.958004] chromium[4099]: segfault at 35a580a2dd38 ip 00007fc7d938f0f0 sp 00007fff1da1bcb8 error 4 in libdrm_intel.so.1.0.0[7fc7d9387000+1f000]
[16027.994823] systemd-journald[111]: Deleted empty journal /var/log/journal/234c2db5e4bf46a8bb2f0fb78faa84fa/[email protected]00000000000.journal (8392704 bytes).
[16028.263903] systemd-journald[111]: Failed to write entry (26 items, 297673596 bytes) despite vacuuming, ignoring: Argument list too long
[16043.277605] chromium[4274]: segfault at 1e3883f586c0 ip 000029973f143167 sp 00007fff2eb11f18 error 4
lshw -c video
*-display
description: VGA compatible controller
product: 2nd Generation Core Processor Family Integrated Graphics Controller
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 09
width: 64 bits
clock: 33MHz
capabilities: msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:48 memory:f5000000-f53fffff memory:e0000000-efffffff ioport:e000(size=64)
vainfo
libva info: VA-API version 0.35.0
libva info: va_getDriverName() returns 0
libva info: Trying to open /usr/lib/dri/i965_drv_video.so
libva info: Found init function __vaDriverInit_0_35
libva info: va_openDriver() returns 0
vainfo: VA-API version: 0.35 (libva 1.3.0)
vainfo: Driver version: Intel i965 driver - 1.3.0
vainfo: Supported profile and entrypoints
VAProfileMPEG2Simple : VAEntrypointVLD
VAProfileMPEG2Main : VAEntrypointVLD
VAProfileH264ConstrainedBaseline: VAEntrypointVLD
VAProfileH264ConstrainedBaseline: VAEntrypointEncSlice
VAProfileH264Main : VAEntrypointVLD
VAProfileH264Main : VAEntrypointEncSlice
VAProfileH264High : VAEntrypointVLD
VAProfileH264High : VAEntrypointEncSlice
VAProfileVC1Simple : VAEntrypointVLD
VAProfileVC1Main : VAEntrypointVLD
VAProfileVC1Advanced : VAEntrypointVLD
VAProfileNone : VAEntrypointVideoProc

Mar 30 20:27:09 localhost kernel: [drm] stuck on render ring
Mar 30 20:27:09 localhost kernel: [drm] stuck on blitter ring
Mar 30 20:27:09 localhost kernel: [drm] GPU crash dump saved to /sys/class/drm/card0/error
Mar 30 20:27:09 localhost kernel: [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.
Mar 30 20:27:09 localhost kernel: [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel
Mar 30 20:27:09 localhost kernel: [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue.
Mar 30 20:27:09 localhost kernel: [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it.
Looks like a driver / software problem to me, i suggest you follow the advice above and register a bugreport.
Check you pacman log for recent updates for the kernel , mesa and xf86-video-intel .
Either of them could be the cause.

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Alex Cummaudo wrote:
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Description
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Files that help describe the problem
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BCP3:    00000000
BCP4:    00000000
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Tue Mar 12 16:09:59 2013
panic(cpu 0 caller 0xffffff8009a51c07): "IOGMD: not wired for the IODMACommand"@/SourceCache/xnu/xnu-2050.18.24/iokit/Kernel/IOMemoryDescriptor.c pp:1424
Backtrace (CPU 0), Frame : Return Address
0xffffff811f1eb0f0 : 0xffffff800961d626
0xffffff811f1eb160 : 0xffffff8009a51c07
0xffffff811f1eb1f0 : 0xffffff8009a4c9de
0xffffff811f1eb2a0 : 0xffffff8009a4d60a
0xffffff811f1eb2c0 : 0xffffff7f89d25a44
0xffffff811f1eb330 : 0xffffff7f89d8fd85
0xffffff811f1eb380 : 0xffffff7f89d8feaf
0xffffff811f1eb3d0 : 0xffffff7f89d75515
0xffffff811f1eb450 : 0xffffff7f89d73815
0xffffff811f1eb490 : 0xffffff7f89d62083
0xffffff811f1eb540 : 0xffffff7f89d8c177
0xffffff811f1eb730 : 0xffffff7f89d8d1d8
0xffffff811f1eb800 : 0xffffff7f8ae1b419
0xffffff811f1eb940 : 0xffffff7f8ae1aefe
0xffffff811f1eb950 : 0xffffff7f8adf2cfb
0xffffff811f1eb960 : 0xffffff7f8adc9580
0xffffff811f1eb9a0 : 0xffffff7f8adc7dc2
0xffffff811f1eb9d0 : 0xffffff7f8adcbe3b
0xffffff811f1eb9f0 : 0xffffff7f8a74e650
0xffffff811f1ebb60 : 0xffffff7f8a74e891
0xffffff811f1ebb90 : 0xffffff7f8a75333e
0xffffff811f1ebbc0 : 0xffffff8009a66f53
0xffffff811f1ebc20 : 0xffffff8009a64b8f
0xffffff811f1ebd70 : 0xffffff80096981e1
0xffffff811f1ebe80 : 0xffffff8009620aed
0xffffff811f1ebeb0 : 0xffffff8009610448
0xffffff811f1ebf00 : 0xffffff800961961b
0xffffff811f1ebf70 : 0xffffff80096a5b16
0xffffff811f1ebfb0 : 0xffffff80096ced53
      Kernel Extensions in backtrace:
         com.apple.iokit.IOSurface(86.0.3)[578CEAAD-1465-3B29-B34F-09586288ED88]@0xfffff f7f8a74c000->0xffffff7f8a75dfff
         com.apple.NVDAResman(8.0)[A4C53A36-22B6-3075-82B9-9DE612A9C015]@0xffffff7f89d1f 000->0xffffff7f8a021fff
            dependency: com.apple.iokit.IOPCIFamily(2.7.2)[B1B77B26-7984-302F-BA8E-544DD3D75E73]@0xffff ff7f89c8d000
            dependency: com.apple.iokit.IONDRVSupport(2.3.5)[86DDB71C-A73A-3EBE-AC44-0BC9A38B9A44]@0xff ffff7f89d0b000
            dependency: com.apple.iokit.IOGraphicsFamily(2.3.5)[803496D0-ADAD-3ADB-B071-8A0A197DA53D]@0 xffffff7f89cc8000
         com.apple.GeForce(8.0)[2E56ED9A-D848-3795-9E52-56BABDC9000C]@0xffffff7f8adc2000 ->0xffffff7f8ae84fff
            dependency: com.apple.NVDAResman(8.0.0)[A4C53A36-22B6-3075-82B9-9DE612A9C015]@0xffffff7f89d 1f000
            dependency: com.apple.iokit.IONDRVSupport(2.3.5)[86DDB71C-A73A-3EBE-AC44-0BC9A38B9A44]@0xff ffff7f89d0b000
            dependency: com.apple.iokit.IOPCIFamily(2.7.2)[B1B77B26-7984-302F-BA8E-544DD3D75E73]@0xffff ff7f89c8d000
            dependency: com.apple.iokit.IOGraphicsFamily(2.3.5)[803496D0-ADAD-3ADB-B071-8A0A197DA53D]@0 xffffff7f89cc8000
BSD process name corresponding to current thread: WindowServer
Boot args: serverperfmode=1
Mac OS version:
12C60
Kernel version:
Darwin Kernel Version 12.2.0: Sat Aug 25 00:48:52 PDT 2012; root:xnu-2050.18.24~1/RELEASE_X86_64
Kernel UUID: 69A5853F-375A-3EF4-9247-478FD0247333
Kernel slide:     0x0000000009400000
Kernel text base: 0xffffff8009600000
System model name: MacPro4,1 (Mac-F221BEC8)
System uptime in nanoseconds: 1924174930934124
last loaded kext at 1910630742999687: com.apple.driver.AppleUSBCDC          4.1.22 (addr 0xffffff7f8b8e4000, size 16384)
last unloaded kext at 1910690812955235: com.apple.driver.AppleUSBCDC          4.1.22 (addr 0xffffff7f8b8e4000, size 12288)
loaded kexts:
com.apple.filesystems.smbfs          1.8
com.apple.driver.AppleHWSensor          1.9.5d0
com.apple.driver.AppleBluetoothMultitouch          75.15
com.apple.iokit.IOBluetoothSerialManager          4.0.9f33
com.apple.driver.AudioAUUC          1.60
com.apple.driver.AppleTyMCEDriver          1.0.2d2
com.apple.driver.AGPM          100.12.69
com.apple.driver.AppleMikeyHIDDriver          122
com.apple.driver.AppleHDA          2.3.1f2
com.apple.iokit.BroadcomBluetoothHCIControllerUSBTransport          4.0.9f33
com.apple.filesystems.autofs          3.0
com.apple.driver.AppleMikeyDriver          2.3.1f2
com.apple.driver.AppleUSBDisplays          353
com.apple.driver.AppleUpstreamUserClient          3.5.10
com.apple.driver.AppleMCCSControl          1.0.33
com.apple.driver.AppleLPC          1.6.0
com.apple.driver.ACPI_SMC_PlatformPlugin          1.0.0
com.apple.GeForce          8.0.0
com.apple.iokit.IOUserEthernet          1.0.0d1
com.apple.Dont_Steal_Mac_OS_X          7.0.0
com.apple.driver.ApplePolicyControl          3.2.11
com.apple.driver.XsanFilter          404
com.apple.iokit.IOAHCIBlockStorage          2.2.2
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless          1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib          1.0.0d1
com.apple.BootCache          34
com.apple.iokit.SCSITaskUserClient          3.5.1
com.apple.driver.AppleUSBHub          5.2.5
com.apple.driver.AppleFWOHCI          4.9.6
com.apple.driver.Intel82574L          2.3.0b4
com.apple.driver.AirPort.Brcm4331          602.15.22
com.apple.driver.AppleAHCIPort          2.4.1
com.apple.driver.AppleUSBEHCI          5.4.0
com.apple.driver.AppleUSBUHCI          5.2.5
com.apple.driver.AppleEFINVRAM          1.6.1
com.apple.driver.AppleRTC          1.5
com.apple.driver.AppleHPET          1.7
com.apple.driver.AppleACPIButtons          1.6
com.apple.driver.AppleSMBIOS          1.9
com.apple.driver.AppleACPIEC          1.6
com.apple.driver.AppleAPIC          1.6
com.apple.driver.AppleIntelCPUPowerManagementClient          196.0.0
com.apple.nke.applicationfirewall          4.0.39
com.apple.security.quarantine          2
com.apple.driver.AppleIntelCPUPowerManagement          196.0.0
com.apple.driver.IOBluetoothHIDDriver          4.0.9f33
com.apple.driver.AppleMultitouchDriver          235.28
com.apple.iokit.IOSerialFamily          10.0.6
com.apple.driver.DspFuncLib          2.3.1f2
com.apple.iokit.AppleBluetoothHCIControllerUSBTransport          4.0.9f33
com.apple.kext.triggers          1.0
com.apple.driver.AppleSMBusPCI          1.0.10d0
com.apple.driver.AppleSMBusController          1.0.10d0
com.apple.driver.IOPlatformPluginLegacy          1.0.0
com.apple.driver.IOPlatformPluginFamily          5.2.0d16
com.apple.iokit.IOFireWireIP          2.2.5
com.apple.driver.AppleUSBAudio          2.9.0f6
com.apple.iokit.IOAudioFamily          1.8.9fc10
com.apple.kext.OSvKernDSPLib          1.6
com.apple.nvidia.nv50hal          8.0.0
com.apple.NVDAResman          8.0.0
com.apple.iokit.IOSurface          86.0.3
com.apple.driver.AppleHDAController          2.3.1f2
com.apple.iokit.IOHDAFamily          2.3.1f2
com.apple.iokit.IOBluetoothFamily          4.0.9f33
com.apple.driver.AppleSMC          3.1.4d2
com.apple.driver.AppleGraphicsControl          3.2.11
com.apple.iokit.IONDRVSupport          2.3.5
com.apple.iokit.IOGraphicsFamily          2.3.5
com.apple.driver.AppleUSBHIDKeyboard          165.5
com.apple.driver.AppleHIDKeyboard          165.5
com.apple.iokit.IOUSBHIDDriver          5.2.5
com.apple.driver.AppleUSBMergeNub          5.2.5
com.apple.driver.AppleUSBComposite          5.2.5
com.apple.iokit.IOSCSIMultimediaCommandsDevice          3.5.1
com.apple.iokit.IOBDStorageFamily          1.7
com.apple.iokit.IODVDStorageFamily          1.7.1
com.apple.iokit.IOCDStorageFamily          1.7.1
com.apple.iokit.IOAHCISerialATAPI          2.5.0
com.apple.iokit.IOSCSIArchitectureModelFamily          3.5.1
com.apple.iokit.IOUSBUserClient          5.2.5
com.apple.iokit.IOFireWireFamily          4.5.5
com.apple.iokit.IO80211Family          500.15
com.apple.iokit.IONetworkingFamily          3.0
com.apple.iokit.IOAHCIFamily          2.2.1
com.apple.iokit.IOUSBFamily          5.4.0
com.apple.driver.AppleEFIRuntime          1.6.1
com.apple.iokit.IOHIDFamily          1.8.0
com.apple.iokit.IOSMBusFamily          1.1
com.apple.security.sandbox          220
com.apple.kext.AppleMatch          1.0.0d1
com.apple.security.TMSafetyNet          7
com.apple.driver.DiskImages          344
com.apple.iokit.IOStorageFamily          1.8
com.apple.driver.AppleKeyStore          28.21
com.apple.driver.AppleACPIPlatform          1.6
com.apple.iokit.IOPCIFamily          2.7.2
com.apple.iokit.IOACPIFamily          1.4
com.apple.kec.corecrypto          1.0

Hi, if not a software problen then sounds like the Video card.
Try holding d key on bootup & see if AHT will run.

Brand new 5k imac GPU heating to ridiculously hot levels under mild use

I'm only browsing the Internet and using Google Hangouts. Presently my GPU die is at 100C and has remained consistent at this temperature throughout the day. The maximum allowed temperature for the GPU die as reported by iStat is 105C.
my rMBP 2014 under a similar load is 117C, however it has an upper limit of (according to iStat) 200C.
I am concerned that the GPU die would come within 5C of overheating under a mild workload. If I were to play a game such as League of Legends I am almost certain that this would cause the GPU die to reach 105C and thus cause the device to power itself off.

GPU proximity is just that. The sensor is near the GPU, not directly in it. Same with any of the other "proximity" sensors. From my Late '09, missing even a GPU proximity sensor. Relatively recent version of iStat Menus, which includes all these "proximity" ones. Don't know what to make of the very high readouts for the GPU Die in your models. Temperature Monitor (free) no longer being supported, but maybe Marcel Bresink, in Hardware Monitor (paid--if it's still being supported for new models) has a note about those. Since those temps are showing high for everyone here, I'd be inclined not to worry about them and use the GPU Proximity as a more reliable guide as to what's going on.
And then from Hardware Monitor, which shows all the same sensors, but with different names. For example, Power Board Proximity is called Power Supply Position 2.
In mine the Northbridge makes a decent proxy for the GPU.

GPU abnormally hot ! Thinkpad t41p FireGL T2 @59C on BIOS fan

I wanted to see if underclocking could improve my battery life. I never got around to it seeing that my GPU got really really hot.
In ATI tray tools, I used the 3D renderer for a few minutes, then I noticed that my GPU had climed to 110C! I immediately stopped the renderer and put my fan at full speed to see if it would help.
Nevertheless the FireGL T2 @57C on BIOS fan, which seems high.
From what I remember there is a rubber pad on the heatsink to evenly press down on the GPU.
Is there anything else that could be causing the GPU to have such high temperatures?
Are the sensor known to be faulty?
Cheers
T61p T7500, Quadro FX 570M, 4GB, 60GB Patriot Pyro, XP Pro
X61t Tablet, L7300 Centrino vPro, Windows 7 Home 64-bit
tpfancontrol installed on all systems

No doubt a professional will do a better job, but at 75$, that is more than what i paid for the machine!
Nevertheless, is definitely the Southbridge that needs to be fixed as I was getting the USB 1.1 and the hard drive would only start with pressure on the wrist pad. Even though I am in my mid thirties, I could hear the high pitch from that part of the board...
As for reflow, a heat gun is only as useful you know the temperature. Using an IR thermometer lets you know about how hot is the chip, and you can monitor as you heat is up gradually. A string/piece of solder could be placed on the chip (which has no components on the surface) to literally see that the chip has attained the temperature for reflow.
I saw the videos on Youtube. Foil around plastic parts is a good idea, but something like asbestos tape, ok an insulating material, and then foil would be safer. My sister reflowed her HP notebook GPU, but she had to resolder the fan connector as the solder heated up and slipped off.
I feel better to know that the Southbridge is not my fault, but I am still an expletive idiot of having put so much liquidy thermal paste.
T61p T7500, Quadro FX 570M, 4GB, 60GB Patriot Pyro, XP Pro
X61t Tablet, L7300 Centrino vPro, Windows 7 Home 64-bit
tpfancontrol installed on all systems

Frequent segfaults caused by gpu

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