Forwarding this bug from Ubuntu reporter Andres Rodriguez: http://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/737891 [Problem] Configuring external monitors appears to be broken with arrandale. Multiple reporters with same chips have confirmed same behavior. The issue appears when configuring monitors using gnome-display-properties, and is not reproduced when using the xrandr command line tool to perform the same configuration steps. [Original Description] While trying to connect external monitors through VGA in my Lenovo x201 with Intel HD Video graphics, gnome-display-properties fails to correctly display in the external monitors IF LVDS is set to off. If LVDS is kept on, then external monitors work correctly (Note that I'm not duplicating screens between LVDS and the external monitors). To reproduce, do as follows: 1. Connect external monitor to VGA output. 2. Launch gnome-display-properties and enable external monitors. 3. At this point, both LVDS and external monitor should be working just fine. 4. Using gnome-display-properties, turn off LVDS. 5. At this point, the image in the external monitor looks like [1]. Now, note that when disabling LVDS with xrandr instead of gnome-display-properties, then the external monitors have a correct image and [1] is not reproduced. [1]: http://me.roaksoax.com/dual-monitor.jpeg DistroRelease: Ubuntu 11.04 Package: x11-xserver-utils 7.6~1 ProcVersionSignature: Ubuntu 2.6.38-7.35-generic 2.6.38 Uname: Linux 2.6.38-7-generic x86_64 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: None DRM.card0.DP.1: status: disconnected enabled: disabled dpms: Off modes: edid-base64: DRM.card0.HDMI.A.1: status: disconnected enabled: disabled dpms: Off modes: edid-base64: DRM.card0.LVDS.1: status: connected enabled: enabled dpms: Off modes: 1280x800 1280x800 edid-base64: AP///////wAwrhFAAAAAAAATAQOAGhB46lzVk1xejiccUFQAAAABAQEBAQEBAQEBAQEBAQEB7hoAgFAgEDAQMBMABaMQAAAZ0BcAxlAgGTAwIDYABaMQAAAZAAAADwCBCjyBCjIWCQBMo0FUAAAA/gBMVE4xMjFBVDA3TDAyADg= DRM.card0.VGA.1: status: connected enabled: enabled dpms: Off modes: 3840x1080 3200x1200 2560x1024 1600x1200 2048x768 1280x1024 1280x1024 1024x768 1024x768 800x600 800x600 640x480 640x480 edid-base64: AP///////wA2mAAFegldUTMUAQMOKR946GDlo1dLnCURUFQlSwCpQIGAAQEBAQEBAQEBAQEB9WUAUPA4H0AQMDsAOjBBAAAaLUoAmKEAKkAwcBwA0SAhAAAawmWAQMGwI0BAQDcAhlIxAAAayDIAgIIAJjAw4DsAQdggAAAYAKU= Date: Fri Mar 18 18:52:01 2011 DistUpgraded: Log time: 2011-02-24 12:39:40.003794 DistroCodename: natty DistroVariant: ubuntu GraphicsCard: Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 02) (prog-if 00 [VGA controller]) Subsystem: Lenovo Device [17aa:215a] InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007) Lsusb: Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 003: ID 17ef:4816 Lenovo Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: LENOVO 3249CTO ProcEnviron: LANGUAGE=en_US:en LANG=en_US.UTF-8ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-7-generic root=UUID=193869b5-a880-4aca-9234-ae912a4b8d70 ro quiet splash vt.handoff=7 Renderer: Unknown SourcePackage: x11-xserver-utils UpgradeStatus: Upgraded to natty on 2011-02-24 (22 days ago) dmi.bios.date: 10/26/2010 dmi.bios.vendor: LENOVO dmi.bios.version: 6QET61WW (1.31 ) dmi.board.name: 3249CTO dmi.board.vendor: LENOVO dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvr6QET61WW(1.31):bd10/26/2010:svnLENOVO:pn3249CTO:pvrThinkPadX201:rvnLENOVO:rn3249CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 3249CTO dmi.product.version: ThinkPad X201 dmi.sys.vendor: LENOVO version.compiz: compiz 1:0.9.4-0ubuntu7 version.libdrm2: libdrm2 2.4.23-1ubuntu3 version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.1-0ubuntu3 version.xserver-xorg: xserver-xorg 1:7.6~3ubuntu11 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu3 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu6
Created attachment 44870 [details] CurrentDmesg.txt
Created attachment 44871 [details] BootDmesg.txt
Created attachment 44872 [details] XorgLog.txt
Created attachment 44873 [details] Xrandr.txt
Created attachment 44874 [details] xrandr-with-lvds.txt
Created attachment 44875 [details] monitors.xml.txt
In the short term, disable compositing.
Thanks for the hint Chris. One question though, why would this work when doing the configuration with xrandr, but not when using gnome-display-properties? Aren't they using the same Xrandr code underneath?
Also, I don't think this is merely a case of exceeding the texture limits of the card. The user reports reproducing the failure with a single 1920-wide monitor and 1280-wide lvds, with compiz shut off. --------------- Bryce, Yes I can confirm that this happens when connecting the laptop directly to the external monitor (not using the dualhead2go). Now, what I did is (all from Classic Desktop no effects - and from gnome-display-settings: 1. Connect external monitor to VGA 2. Enable mirror screens: WORKED 3. Disable mirror screens and Enable external monitor at 1920x1080: WORKED 4. Disable LVDS and leave VGA as sole monitor: FAILED (You can see what happens in the video: [1]) Now, if I do step 4 with xrandr (disable LVDS with xrandr), it works perfectly. Furthermore, if I save the configuration (LVDS disabled, VGA1 Enabled) and reboot the computer, then LVDS is off by default and VGA1 should be displaying the image, however, the same occurs as with video [1]. Finally, if I do the steps above but place LVDS *under* the external monitor (using gnome-display-settings), the same as video [1] occurs. Hope this helps. Please let me know if you need any further info. [1]: http://me.roaksoax.com/dualmonitor.3gp
Eric? The bug has nothing to do with X, just the GL compositor failing to render because its render target is too large. One solution is per-crtc-pixmaps (until we get single screen monitors larger than 4096). The other would be to remove the artificial limitation within mesa.
"One solution is per-crtc-pixmaps (until we get single screen monitors larger than 4096)." A dualhead2go will display a couple 2560x1440 or whatever monitors as a single monitor with >4096 horiz rez. So this is not a theoretical problem.
I just want to mention that I have the same problem with a X201 too - however: My external display only has 1680x1050 and the internal has 1440x900 screen resolution. Which leaves me puzzled why this problem relates to 4096 pixel? If you need any more information about my configuration I am happy to provide what I can.
Hmm, mesa.git now supports 8192x8192 textures on Ironlake so it will be worth seeing if that does indeed make a difference here. (Note that you can't actually fit a 8192x8192 into the AGP aperture so if you do try the GL application will be killed by a SIGBUS currently.)
Support is in mesa, caveat the potential SIGBUS issue.
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