T420 - Triple Monitors/Enable Optimus?

I have a T420, and am trying to run 3 monitors (2 external + the laptop display).  I am have hooked up one monitor to the VGA and another to the display port on my docking station, and am able to run 2 monitors in any combination.  However it won't let me do 3.
According to what I read here http://forums.lenovo.com/t5/Options-Accessories/Mini-Dock-Plus-Series-3-with-Triple-Monitors/td-p/57..., I should make sure Optimus is enabled.  How exactly do I do this?  I saw one note regarding the bios, but I didn't see the setting there that referenced Optimus.
Thanks!

exlim wrote:
I have a T420, and am trying to run 3 monitors (2 external + the laptop display).  I am have hooked up one monitor to the VGA and another to the display port on my docking station, and am able to run 2 monitors in any combination.  However it won't let me do 3.
According to what I read here http://forums.lenovo.com/t5/Options-Accessories/Mini-Dock-Plus-Series-3-with-Triple-Monitors/td-p/57..., I should make sure Optimus is enabled.  How exactly do I do this?  I saw one note regarding the bios, but I didn't see the setting there that referenced Optimus.
Thanks!
Which model T420 do you have?

Similar Messages

  • Need Xorg config file for dual graphics cards, triple monitors

    Hey guys, I'm having a bit of trouble getting triple monitors working on my system. The two plugged into the graphics card (radeon x300) work fine, but the one plugged into onboard graphics (geforce 6150SE) refuses to appear in xrandr. I figure I need to make a /etc/X11/xorg.conf.d/10-monitor.conf file but I'm confused about how to do it with separate cards. I find the wiki instructions that I can find confusing, as I've never had to deal with xorg files before (has always autoconfigured for me no problems).
    Relevant code:
    [greg@spacebar ~]$ lspci | grep VGA
    00:0d.0 VGA compatible controller: nVidia Corporation C61 [GeForce 6150SE nForce 430] (rev a2)
    02:00.0 VGA compatible controller: ATI Technologies Inc RV370 5B60 [Radeon X300 (PCIE)]
    [greg@spacebar ~]$ xrandr
    Screen 0: minimum 320 x 200, current 2960 x 1050, maximum 4096 x 4096
    VGA-0 connected 1280x1024+1680+0 (normal left inverted right x axis y axis) 338mm x 270mm
    1280x1024 60.0*+ 75.0
    1152x864 75.0
    1024x768 75.1 60.0
    800x600 75.0 60.3
    640x480 75.0 60.0
    720x400 70.1
    DVI-0 connected 1680x1050+0+0 (normal left inverted right x axis y axis) 430mm x 270mm
    1680x1050 59.9*+
    1280x1024 75.0 60.0
    1152x864 75.0
    1024x768 75.1 60.0
    800x600 75.0 60.3
    640x480 75.0 60.0
    720x400 70.1
    S-video disconnected (normal left inverted right x axis y axis)
    [greg@spacebar ~]$ pacman -Q | grep xf86-video
    xf86-video-ati 6.14.3-1
    xf86-video-nouveau 0.0.16_git20120106-1
    xf86-video-vesa 2.3.0-7
    [greg@spacebar ~]$ cat /etc/mkinitcpio.conf | grep MODULES=
    MODULES="radeon nouveau"
    I just can't seem to understand how to write the 10-monitor.conf file. I was wondering if anyone could give me a hand?
    Also, the third monitor to be connected via onboard VGA is also 1280x1024 and will be left of the other two.

    Depends on the motherboard. This one allows you to enable the onboard graphics only when no external card is found, or always enable. The PCI-E card initialises first, if that helps.
    EDIT: Also I can confirm that it can run both cards (all three monitors) at the same time by switching to initialise the onboard card first, however that makes some weird stuff happen so I switched it back. And also the nouveau driver is shown in lsmod, and gets detected in the boot message logs.
    Last edited by MisterAnderson (2012-01-26 16:56:58)

  • T410 triple monitor capability??

    Hi all,
    I currently use my T410 (w/ NVS3100MS optimus tech) with a LCD via DisplayPort.
    I have another monitor at home with RGB connector.
    I've tried connecting 2 external monitors to have a triple monitor but it did not work.
    I went through the web and looks like for any T410 model, to make a triple monitor i have to have a mini dock.
    Is that the only option??
    Hope anyone knows about this issue. Thanks a lot

    If you had the Tx20 series you would be able to do it without a dock.

  • Triple monitor: Sapphire HD5670 512MB (*non* eyefinity version)

    Those reading will know that, in order to have up to 3 displays showing content in a single graphics card, if it's an AMD card then you need a certain feature known as EyeFinity.
    In particular, I am talking about tihs card:
    http://www.google.co.uk/products/catalo … CDAQ8wIwAQ
    You will notice in the picture that this one has  DP, but there is another version that has VGA port in its place. I courd not for the life of me find it again, but at the time of buying the concern was CRT usage, so a VGA port was important. I did not know about EyeFinity at the time.
    This guide is for people whe made mistakes like this.
    This is typically the case. With my card in particular, you cannot get triple monitor in Windows, because the drivers prevent it (it is possible in Linux).
    I said prevent.
    If a card has 3 video outputs, each with their own RAMDAC (or none, if its digital-only), then why can you not use all 3 at the same time?
    Typically in such a setup, if it does not have EyeFinity, then the connectors are usually:
    VGA, DVI, HDMI (my card)
    or
    DVI, DVI, VGA (other cards)
    or
    DVI DVI, HDMI
    or
    HDMI, HDMI, DVI
    In other words, all ef these types of card without support for EyeFinity, do not have:
    DisplayPort connector
    This is a rather crude way of getting it to work, but any solution is a selution still.
    Well, here is a simple way I get triple monitor on my card that does not support EyeFinity:
    VGA lcd in the VGA
    DVI lcd in the DVI
    DVI lcd in the HDMI (using HDMI-DVI adapter)
    The HDMI is disconnected via a coupler, before I boot into Linux. I have a script with these commands:
    xrandr --auto --output VGA-0 --mode 1280x1024
    xrandr --auto --output DVI-0 --mode 1280x1024 --right-of VGA-0
    xrandr --auto --output HDMI-0 --mode 1280x1024 --right-of DVI-0
    (run it as a bash script)
    With the HDMI (via HDMI-DVI, then a DVI coupler, then DVI to DVI going to the monitor) disconnected at the coupler, I run this script.
    Of course, this script sets triple monitor, but right now only the DVI and VGA are hooked up.
    Once it has done, I have dual monitor.
    Then, connect at the coupler (or "gender changer") on the HDMI output. Now all 3 displays are connected, but you still have dual monitor.
    Run the above commands again, and you will see triple monitor.
    Now that you have solved the problem of getting tri-monitor in X, if you look at your TTYs you will notice that only one of the screens is showing. In X (usually terminal 7 or 8), simply disconnect the HDMI at the coupler for a few seconds, then reconnect it.
    Now you to your TTY (Ctrl-Alt-F{1-6}), and it will show text on all 3 screens (albeit duplicated).
    Thoughts,
    I am not sure as to why this is possible to do. I see it as "tricking" the other incapable hardware into outputting on 3 displays, but it seems penfectly functional.
    My guess is that this actually is an EyeFinity card, in the sense that it is the same base an which other cards (with DP, and thus, EyeFinity) are built, but that this particular card can be used in the same way, to get triple monitor.
    Either that, or this is a "bug" in X11/XrandR (if it is a bug, please do not fix it, I like my triple monitors, I call it a feature).
    I know that this certainly works in Xubuntu too, I tried it on a Live CD.
    I tried removing the graphics card and trying this on the intergrated graphics (HD 4290/4250 I think), which also has the same 3 outputs, but the hardwas itself actually enforces a maximum of 2 monitors. If you have DVI and HDMI hooked up, it defaults to HDMI, but masquerades as DVI (where the drivers are concerned). You could use this hack, but then it would still not work because the hardware itself, not the driver softawre, is enforcing it.
    The board is: ASUS M4a89GTD PRO
    Last edited by NightCrawler03X (2012-01-17 17:45:59)

    Hello,
    i get the same messages without any problems for my intel card.
    You can read more about it in this thread:
    http://forums.gentoo.org/viewtopic-t-85 … ec66f93bf2
    There are a fair amount of people who have posted their /proc/mtrr there, you can compare yours to them.
    In the end they come to the conclusion, that uncachable entries are not a problem, for the most systems.
    However uncachable regions of 1024MB seem to be too large.
    On my mtrr the biggest uncachable entry is 64MB.
    So you might get improvement from solving this.

  • Triple Monitor on T500 with RC and beta drivers...

    Hello all I was running a beta driver from the beta Lenovo website and was able to run triple monitors.
    Now with the RTM I cannot...
    I was hoping that someone might have the old version of the beta drivers that Lenovo had on the beta site last year aroung May/June...
    This was running without any extra hardware, it allowed windows to "see" both display drivers and allow them to be used.
    If someone want I can send you a pic as proof, but could you please send me the old drivers for the "switchable graphics" ( I think that was the thing.)
    This is a laptop T500 w the ATI 3650 HD and the intel express graphics card built in.
    Thanks in advance.

    What display are you using? Are you using a direct HDMI connection or are you using an adapter?

  • MacPro3,1 triple monitor setup

    Hi there!
    I'm looking to expand my Apple 30" monitor setup with two (very cheap but highly acclaimed) Dell UltraSharp™ U2311H monitors. However, I'm unsure if I do or do not need an additional video card and if so, which one. I have an NVIDIA GeForce 8800 GT with (I think) two DVI-I Dual Link ports. I've read that there are DVI-splitters, but I have been unable to find any conclusive information.
    Does anyone know how I can do this?
    Friendly greetings, D, Amsterdam.

    Hi Grant!
    Thanks for your help earlier ;-)
    I hope you might be able to shed some light on a little problem I have with my triple monitor setup. I bought the following items:
    Two Dell Professional P2411H 61cm (24") LED monitors.
    Two MiniDisplayPort to DVI adapters.
    I've took your advice on the card and also got one ATI RADEON HD 5770 1GB-ZML card.
    The monitors, in combination with the adapters and the card ... it all works, but there's one limitation I believe shouldn't be there.
    The problem is this: either the hardware or software is only allowing me to connect two displays in total. If I connect all three displays, only the Dell monitors are able to connect. If I disconnect one Dell monitor, the Apple 30" display goes live. So, whatever in whatever combination or order I try to connect the displays, only two screens are connecting simultaneously.
    Do you, or does someone else know how to fix this? Would be great to fix this soon and become the pixonaut of my own digitale cockpit!

  • Triple Monitor Display for Laptops

    Im looking for a triple monitor bracket like the one MSI uses in their advertisement for the 4 monitor Matrix display.. Laptop in Middle, monitor on left and right, and one up high. Any help, links, advice would be great.
    Thanks,
    Brett
    MSI GT70-20D Stock the one with the 24gb of ram.. Etc etc

    that will be more then likely referring to a Falcon Tango Monitor Matrix (The 1 over 3 Monitor Matrix) (Quad monitor stand) without the central monitor attached!
    you can only get them from the manufacturer as they are custom made stands and run around $440US http://www.tradingcomputers.com/TCarrays.html
    MSI do not make stands like that they will just have been illustrating it like that for Marketing just to show how it could be used

  • How to setup triple monitor in Dell E5430

    I'm trying to set two monitors plus the onboard display to work as triple monitor, but I'm getting "xrandr: Configure crtc 2 failed".  I can get both monitors working together.  Does someone know what is wrong?  Thanks in advance!
    What xrandr says about my hardware:
    $ xrandr
    Screen 0: minimum 8 x 8, current 3200 x 900, maximum 32767 x 32767
    LVDS1 connected (normal left inverted right x axis y axis)
    1366x768 59.99 + 40.00
    1024x768 85.00 75.03 70.07 60.00
    1024x768i 86.96
    832x624 74.55
    800x600 85.14 72.19 75.00 60.32 56.25
    640x480 85.01 72.81 75.00 59.94
    720x400 85.04
    640x400 85.08
    632x395 108.01
    640x350 85.08
    504x378 80.97
    248x155 113.26 82.19
    VGA1 connected 1600x900+1600+0 (normal left inverted right x axis y axis) 443mm x 249mm
    1600x900 60.00*+
    1152x864 75.00
    1024x768 75.08 60.00
    832x624 74.55
    800x600 75.00 60.32 56.25
    640x480 75.00 60.00
    720x400 70.08
    HDMI1 connected primary 1600x900+0+0 (normal left inverted right x axis y axis) 443mm x 249mm
    1600x900 60.00*+
    1152x864 75.00
    1024x768 75.08 60.00
    832x624 74.55
    800x600 75.00 60.32 56.25
    640x480 75.00 60.00
    720x400 70.08
    DP1 disconnected (normal left inverted right x axis y axis)
    HDMI2 disconnected (normal left inverted right x axis y axis)
    HDMI3 disconnected (normal left inverted right x axis y axis)
    DP2 disconnected (normal left inverted right x axis y axis)
    DP3 disconnected (normal left inverted right x axis y axis)
    VIRTUAL1 disconnected (normal left inverted right x axis y axis)
    My onboard graphics card:
    $ lspci -vvv -s 00:02.0
    00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) (prog-if 00 [VGA controller])
    Subsystem: Dell Device 053c
    Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
    Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
    Latency: 0
    Interrupt: pin A routed to IRQ 46
    Region 0: Memory at f6400000 (64-bit, non-prefetchable) [size=4M]
    Region 2: Memory at e0000000 (64-bit, prefetchable) [size=256M]
    Region 4: I/O ports at f000 [size=64]
    Expansion ROM at <unassigned> [disabled]
    Capabilities: <access denied>
    Kernel driver in use: i915
    Kernel modules: i915
    output:
    $ xrandr --output LVDS1 --auto --rate 60.32 --output VGA1 --auto --right-of LVDS1 --output HDMI1 --auto --left-of LVDS1 --verbose
    screen 0: 4566x900 1207x237 mm 96.05dpi
    crtc 0: 1600x900 60.00 +0+0 "HDMI1"
    crtc 1: 1600x900 60.00 +2966+0 "VGA1"
    crtc 2: 1366x768 59.99 +1600+0 "LVDS1"
    xrandr: Configure crtc 2 failed
    crtc 0: disable
    crtc 1: disable
    crtc 2: disable
    crtc 3: disable
    screen 0: revert
    crtc 0: revert
    crtc 1: revert
    crtc 2: revert
    crtc 3: revert

    Any luck? 
    I have a similar issue.  I currently have a triple monitor setup, a 1920x1080 + the laptop at 1920x1080 +  another on 1600 x 900.  this works fine.  When I swap out the 1600x900 for another monitor at 1920x1080, i get the same error.  I can get any combination of 2 monitors working, and I can get all 3 working if the 3rd is at a reduced resolution (1400x900), but at full resolution i just get the error.  The same setup works fine in windows at 1920x1080.

  • Z360 - How to install NVIDIA drivers and enable Optimus on Ubuntu 13.04

    Hello,
    I moved to use Ubuntu on my Z360 laptop. I installed Ubuntu 13.04.
    But I have a problem with NVIDIA drivers. I tried to download it from NVIDIA website and install it but it brings a lot of problems.
    The resolution of desktop switched to very low and OpenGL cannot start - all dialogs hasn't title panel, desktop without panels.
    Please, can somebody explain how can I install NVIDIA drivers and enable Optimus on my Z360?

    I am not sure if Nvidia supports 13.04 because it is still in the Beta stage?
    Cheers and regards,
    • » νιנαｿѕαяα∂нι ѕαмανє∂αм ™ « •
    ●๋•کáŕádhí'ک díáŕý ツ
    I am a volunteer here. I don't work for Lenovo

  • [Solved] gs60 ghost pro triple monitor setup??

    any one try to put a display port hub on the gs60 ghost pro something like the 3d-club MST
    link: http://www.club-3d.com/index.php/products/reader.en/product/mst-hub-1-3.html
    i have a triple monitor setup for my desktop machine and i was wondering if it is possible to just plug my gs60 into a USB hub for sound, keyboard, and mouse. then a MST display port hub just dock and game. from what i read online the GTX 870M will work in this configuration i just want to know if anyone here has tried it?

    Quote from: Yippyyay;104043
    any one try to put a display port hub on the gs60 ghost pro something like the 3d-club MST
    link: http://www.club-3d.com/index.php/products/reader.en/product/mst-hub-1-3.html
    i have a triple monitor setup for my desktop machine and i was wondering if it is possible to just plug my gs60 into a USB hub for sound, keyboard, and mouse. then a MST display port hub just dock and game. from what i read online the GTX 870M will work in this configuration i just want to know if anyone here has tried it?
    Yes, it works.

  • Volume gain fluctuation problem in iPad(random decreasing/increasing volume) with audio monitoring enabled.

    I have one bass track and a drums track picked from loops and when playing the guitar(iPad2 with apogee jam connected) with monitoring enabled I get gain fluctuation problems(random decreasing/increasing volume, some times mute). When I stop playing the guitar audio feedback gets back to normal.
    Any idea?

    Hi George Ward2
    I'm wondering if you accidentally or unintentionally locked the audio in a segment/s where you intended to fade up or down. Altho you say it plays fine when you review it in iMovie. The place to review it is in iDVD. However adjustments are made in iMovie for the actual audio and video. Here's what I found in the Help Menu for iMovie since there isn't much info on the iDVD portion of the help menu for the same symptoms:
    Making your movie louder or softer:
    If you find that all or part of your movie is too loud or too soft, you can adjust the volume of your movie in the timeline viewer. You can increase or decrease the volume of the entire movie or just specific audio clips. For example, at a certain point in a video you might dramatically increase or decrease the volume of accompanying music.
    IMPORTANT: These instructions are for setting the volume of video that people will hear as they play your movie. If you only want to adjust the volume of your computer's speakers, see "Adjusting the volume of your computer in iMovie HD" below.
    To make your movie louder or softer:
    Click the Timeline Viewer button (shown above).
    Select the clip or clips whose volume you want to change in the timeline viewer.
    Tip: To learn how to select multiple clips, see "Selecting clips" below.
    Click the clip volume button (shown below), and then drag the slider to adjust the volume.
    Tip: You can also type a new percentage in the field next to the clip volume button to adjust volume.
    You can also make finer audio adjustments within a clip. For more information, see "Fading audio up or down."
    Just out of curiosity .... is the source audio 12 bit or 16 bit?
    Hope this is helpful and good luck.
    SDMacuser

  • Thinkpad T420 three monitors linux/nvidia optimus

    Hello,
    I have a thinkpad T420 with a nvidia nvs4200 optimus. It has two video ports, one vga and one displayport. With optimus and windows 7 it should be able to display an two external and the internal display, in sum on three monitors.
    In the bios I can switch between integrated, discrete, optimus. With discrete I am able to use two monitors. With optimus enabled, the Intel can't see the displayport.
    Now the interesting thing. I installed bumblebee and it works. For curiosity I set it up to use the monitor "DP1", et voila, after running the bumblebee deamon and something with optirun I can see the bumblebee X server on the third monitor connected to the displayport. I can run something on it with "DISPLAY=:8.0 gvim" or even "DISPLAY=:8.0 nvidia-settings". Btw. it uses the same mouse as the first X server.
    Now, any ideas how I could setup it for something useful?
    EDIT:
    Ok, with Xdmx it is possible to span a desktop using all three monitors, but with disabled glx, that means no composite, 3d etc.
    Setup to test it, assuming a running bumblebee installation:
    pacman -S xterm xorg-server-xdmx
    echo "exec /usr/bin/optirun /usr/bin/xterm" > ~/.xinitrc
    sudo /etc/rc.d/bumblebee start
    startx -- :7
    -in xterm run
    startx /usr/bin/xfce4-session -- /usr/bin/Xdmx -display :7 -display :8 +xinerama -noglxproxy
    Until someone has an idea how to enable glx, this setup is hardly useful.
    Gruß, Georg
    Last edited by Dschoordsch (2011-08-25 09:27:21)

    I managed to get 3 monitors working on my T420 with a Lenovo Mini Dock Series 3 Plus. Have a look at my xorg.conf below. Please note that with my T420, the DVI ports on the dock are (probably) hardwired to the nvidia card. The VGA might possibly be, as you said, hardwired to the intel card, whereas the DisplayPort might be hardwired to the nvidia card. So you'd need to power two screens (VGA + internal display) using the intel card and one screen (DP) using the nvidia.
    "ServerLayout"
    Identifier "X.org Configured"
    Screen 0 "LG0" 0 0
    Screen 1 "LG1" RightOf "LG0"
    Screen 2 "INT" LeftOf "LG0"
    InputDevice "Mouse0" "CorePointer"
    InputDevice "Keyboard0" "CoreKeyboard"
    Option "Xinerama" "1"
    EndSection
    Section "Files"
    ModulePath "/usr/lib/xorg/modules"
    FontPath "/usr/share/fonts/X11/misc"
    FontPath "/usr/share/fonts/X11/cyrillic"
    FontPath "/usr/share/fonts/X11/100dpi/:unscaled"
    FontPath "/usr/share/fonts/X11/75dpi/:unscaled"
    FontPath "/usr/share/fonts/X11/Type1"
    FontPath "/usr/share/fonts/X11/100dpi"
    FontPath "/usr/share/fonts/X11/75dpi"
    FontPath "/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType"
    FontPath "built-ins"
    EndSection
    Section "Module"
    Load "record"
    Load "extmod"
    Load "dbe"
    Load "glx"
    Load "dri2"
    Load "dri"
    EndSection
    Section "InputDevice"
    Identifier "Keyboard0"
    Driver "kbd"
    EndSection
    Section "InputDevice"
    Identifier "Mouse0"
    Driver "mouse"
    Option "Protocol" "auto"
    Option "Device" "/dev/input/mice"
    Option "ZAxisMapping" "4 5 6 7"
    EndSection
    Section "Monitor"
    Identifier "LG0"
    VendorName "LG"
    ModelName "LG Electronics L227W"
    HorizSync 30.0 - 83.0
    VertRefresh 56.0 - 75.0
    EndSection
    Section "Monitor"
    Identifier "LG1"
    VendorName "LG"
    ModelName "LG Electronics L227W"
    HorizSync 30.0 - 83.0
    VertRefresh 56.0 - 75.0
    EndSection
    Section "Monitor"
    Identifier "INT"
    VendorName "Unknown"
    ModelName "Internal"
    HorizSync 30.0 - 83.0
    VertRefresh 56.0 - 75.0
    EndSection
    Section "Device"
    Identifier "intel0"
    Driver "intel"
    Option "XvMC" "true"
    Option "UseEvents" "true"
    Option "AccelMethod" "UXA"
    BusID "PCI:0:2:0"
    EndSection
    Section "Device"
    Identifier "nvidia0"
    Driver "nvidia"
    VendorName "NVIDIA Corporation"
    BoardName "NVS 4200M"
    BusID "PCI:1:0:0"
    Screen 0
    EndSection
    Section "Device"
    Identifier "nvidia1"
    Driver "nvidia"
    VendorName "NVIDIA Corporation"
    BoardName "NVS 4200M"
    BusID "PCI:1:0:0"
    Screen 1
    EndSection
    Section "Screen"
    Identifier "LG0"
    Device "nvidia0"
    Monitor "LG0"
    DefaultDepth 24
    Option "TwinView" "0"
    SubSection "Display"
    Depth 24
    EndSubSection
    EndSection
    Section "Screen"
    Identifier "LG1"
    Device "nvidia1"
    Monitor "LG1"
    DefaultDepth 24
    Option "TwinView" "0"
    SubSection "Display"
    Depth 24
    EndSubSection
    EndSection
    Section "Screen"
    Identifier "INT"
    Device "intel"
    Monitor "INT"
    DefaultDepth 24
    SubSection "Display"
    Depth 24
    EndSubSection
    EndSection
    Last edited by fhirschmann (2011-09-20 21:46:31)

  • Linux 3.11 breaks triple monitor support on intel graphics

    I just ran pacman -Syu, observed linux (3.10.10-1 -> 3.11.1-1), and found that I can no longer use more than 2 monitors simultaneously. When I try to configure 3 or 4 monitors with xrandr or arandr, I get an error message like "xrandr: configure crtc 2 failed".
    When I boot with linux-lts 3.10.12, it works reliably again.
    I have Intel HD Graphics 4000 on a i5-3320M CPU for a Thinkpad T530 with a ThinkPad Mini Dock Series 3.
    I have 4 monitors: internal laptop screen, DVI, DisplayPort, and a USB DisplayLink. With linux 3.10, all 4 can work simultaneously. With linux 3.11, any 2 of them can work simultaneously.
    In my journalctl at boot time, I see
    kernel: fbcon: inteldrmfb (fb1) is primary device
    kernel: fbcon: Remapping primary device, fb1, to tty 1-63
    kernel: e1000e 0000:00:19.0: irq 45 for MSI/MSI-X
    kernel: IPv6: ADDRCONF(NETDEV_UP): ethernet0: link is not ready
    kernel: iwlwifi 0000:03:00.0: L1 Enabled; Disabling L0S
    kernel: iwlwifi 0000:03:00.0: Radio type=0x2-0x0-0x0
    kernel: psmouse serio1: synaptics: Touchpad model: 1, fw: 7.2, id: 0x1c0b1, caps: 0xd047b3/0xb40000/0xa0000, board id: 71, fw id: 920262
    kernel: psmouse serio1: synaptics: serio: Synaptics pass-through port at isa0060/serio1/input0
    kernel: input: SynPS/2 Synaptics TouchPad as /devices/platform/i8042/serio1/input/input18
    kernel: iwlwifi 0000:03:00.0: L1 Enabled; Disabling L0S
    kernel: iwlwifi 0000:03:00.0: Radio type=0x2-0x0-0x0
    kernel: IPv6: ADDRCONF(NETDEV_UP): wifi0: link is not ready
    kernel: con2fb_init_display: detected unhandled fb_set_par error, error code -22
    kernel: [drm] Enabling RC6 states: RC6 on, RC6p on, RC6pp on
    kernel: wifi0: authenticate with .........
    kernel: .ready
    kernel: sd 7:0:0:0: [sdd] .........
    kernel: released /dev/fb0 user=0 count=0
    kernel: con2fb_release_oldinfo: detected unhandled fb_set_par error, error code -22
    kernel: i915 0000:00:02.0: fb1: inteldrmfb frame buffer device
    Yesterday when I was running linux 3.10, I saw this in my journalctl at boot time with no errors:
    kernel: fbcon: inteldrmfb (fb1) is primary device
    kernel: fbcon: Remapping primary device, fb1, to tty 1-63
    kernel: e1000e 0000:00:19.0: irq 45 for MSI/MSI-X
    kernel: e1000e 0000:00:19.0: irq 45 for MSI/MSI-X
    kernel: IPv6: ADDRCONF(NETDEV_UP): ethernet0: link is not ready
    kernel: iwlwifi 0000:03:00.0: L1 Enabled; Disabling L0S
    kernel: iwlwifi 0000:03:00.0: Radio type=0x2-0x0-0x0
    kernel: psmouse serio1: synaptics: Touchpad model: 1, fw: 7.2, id: 0x1c0b1, caps: 0xd047b3/0xb40000/0xa0000, board id: 71, fw id: 920262
    kernel: psmouse serio1: synaptics: serio: Synaptics pass-through port at isa0060/serio1/input0
    kernel: input: SynPS/2 Synaptics TouchPad as /devices/platform/i8042/serio1/input/input18
    kernel: iwlwifi 0000:03:00.0: L1 Enabled; Disabling L0S
    kernel: iwlwifi 0000:03:00.0: Radio type=0x2-0x0-0x0
    kernel: IPv6: ADDRCONF(NETDEV_UP): wifi0: link is not ready
    kernel: wifi0: authenticate with .............
    kernel: released /dev/fb0 user=0 count=0
    kernel: i915 0000:00:02.0: fb1: inteldrmfb frame buffer device
    My symptoms seem similar to Unable to configure 3 display multihead / X fails to start with 3 displays connected, although that was reported on linux 3.4.

    Googling around, I found a few more people with what looks like the same problem commenting at the bottom of wrpll sharing not implemented (3x HDMI/DVI screens).
    I have Intel graphics card and it supports triple head setup very well. ... I updated kernel to 3.11.1 after it appeared in Archlinux's repo and one of screens stopped working. I tried to fix it with xrandr but I got only "xrandr: Configure crtc failed" errors and these in Xorg.0.log:
    I have a similar setup and am experiencing the same thing. Downgrading to 3.10 fixed the issue. I'm also happy to help fix this.
    But apparently it's not the correct bug since someone said "if triple display worked and regressed in recent kernels then you have a different bug."
    I think I should report this somewhere, but I'm not sure I understand exactly where (linux or xorg or arch?)

  • T420s + 2 monitor + integrated screen setup. How make it work?

    Hi All.
    I'm trying to make my T420s with integrated grahpics only work in a 3 screen setup. Im using no docking station but the configuration is said to be supported. But the software simply switches of one monitor when i activate the other and vise versa. The Intel grahpics and media software doesnt seem to even support a 3 screen configuration.
    Anyone knows how to make it work?
    regards from sweden.

    OK. Just to get things clear since I always thought that the T420s with Intel integrated grahpics only would be able to drive 3 simultanious screens with one beeing the internal screen, while the T420s with Optimus is able to drive 4 if used with a docking station.
    But apparently, the Intel integrated only version seems to be able to drive only two simultaneous screens, while the Optimus version is able to drive 3 without a dock and 4 with a dock. Correct?

  • T420 - Triple display not working

    So, according to this page: http://www-307.ibm.com/pc/support/site.wss/MIGR-76617.html , the T420 I have is supposed to support two external displays as well as the laptop display as follows:
    ThinkPad-only Triple Display Configuration:
    1st Display: Active ThinkPad display
    2nd Display: VGA analog monitor attached to the ThinkPad VGA analog port.
    3rd Display: DisplayPort monitor attached to the ThinkPad DisplayPort
    However, when I connect both external displays, it will switch off one of the external monitors (the first one connected).
    Using display port to HDMI cable for monitor 1, VGA for monitor 2.  Both are verified working as external monitors with the T420, just not at the same time.
    I've looked through the BIOS and display properties to no avail.
    Is this actually possible without a docking station?
    -B

    Only a laptop with a discrete NVIDIA graphics card, will support those configurations. If you just have the onboard Intel graphics, then I bet you'll only be able to drive two without a dock. With a dock, you still may be able to drive three monitors (including the ThinkPad's LCD).
    BTW, I found even with an NVIDIA discrete graphics option, that page you refer to is incorrect (else I have a problem with my docking station). It says you can drive three monitors with "Any combination of the following" when after much trial and error, I determiend one has to be a VGA analog connection. 

Maybe you are looking for