> Steps to reproduce the issue. I have a Lenovo X250 on my docking station with two external monitors, one connected via DVI and one via DP. The DVI works ok, but the DP doesn't even get listed in xrandr --query. If I use the HDMI port, it is listed, but the monitor remains blank (lack of bandwidth for the resolution?). > How often does the steps listed above trigger the issue? For example: always, 1 out 3 times. Always. -- system architecture: ("uname -m") x86_64 -- kernel version: ("uname -r"). Again, please consider using latest drm-intel-nightly from http://cgit.freedesktop.org/drm-intel (I tried to build it; it's an excessively long build and the final step (sudo make install) failed). 4.6.0-040600rc6-generic -- Linux distribution: Ubuntu 16.04 -- Machine or mother board model: Lenovo X250 -- Display connector: (such as HDMI, DP, eDP, ...) DP > A full dmesg with debug information and/or a GPU crash dump I'll try to get this and add it. > Config details : built-in: 1920x1080 HP 2335: 1920x1200 BenQ GW2765: 2560x1440 The HP is connected via DVI and the BenQ via Display Port. In this configuration, I get my HP and built-in ok, but the BenQ doesn't show up at all (using xrandr --query). If I connect the BenQ via HDMI, then it shows up in xrandr --query, but the display is still blank (bandwidth issue?). Here's the output with the DVI + DP config : $ xrandr --query Screen 0: minimum 8 x 8, current 3840 x 1200, maximum 32767 x 32767 eDP1 connected 1920x1080+1920+0 (normal left inverted right x axis y axis) 276mm x 156mm 1920x1080 60.04*+ 59.93 1680x1050 59.95 59.88 1600x1024 60.17 1400x1050 59.98 1600x900 60.00 1280x1024 60.02 1440x900 59.89 1280x960 60.00 1368x768 60.00 1360x768 59.80 59.96 1152x864 60.00 1280x720 60.00 1024x768 60.00 1024x576 60.00 960x540 60.00 800x600 60.32 56.25 864x486 60.00 640x480 59.94 720x405 60.00 640x360 60.00 DP1 disconnected (normal left inverted right x axis y axis) DP2 disconnected (normal left inverted right x axis y axis) DP2-1 disconnected (normal left inverted right x axis y axis) DP2-2 connected primary 1920x1200+0+0 (normal left inverted right x axis y axis) 495mm x 310mm 1920x1200 59.95*+ 1600x1200 60.00 1280x1024 85.02 75.02 60.02 1280x960 60.00 1152x864 75.00 1024x768 85.00 75.03 70.07 60.00 832x624 74.55 800x600 75.00 60.32 640x480 75.00 59.94 720x400 70.08 DP2-3 disconnected (normal left inverted right x axis y axis) HDMI1 disconnected (normal left inverted right x axis y axis) HDMI2 disconnected (normal left inverted right x axis y axis) VIRTUAL1 disconnected (normal left inverted right x axis y axis) and with built-in and BenQ only : $ xrandr --query Screen 0: minimum 8 x 8, current 4480 x 1440, maximum 32767 x 32767 eDP1 connected primary 1920x1080+0+360 (normal left inverted right x axis y axis) 276mm x 156mm 1920x1080 60.04*+ 59.93 1680x1050 59.95 59.88 1600x1024 60.17 1400x1050 59.98 1600x900 60.00 1280x1024 60.02 1440x900 59.89 1280x960 60.00 1368x768 60.00 1360x768 59.80 59.96 1152x864 60.00 1280x720 60.00 1024x768 60.00 1024x576 60.00 960x540 60.00 800x600 60.32 56.25 864x486 60.00 640x480 59.94 720x405 60.00 640x360 60.00 DP1 disconnected (normal left inverted right x axis y axis) DP2 disconnected (normal left inverted right x axis y axis) DP2-1 connected 2560x1440+1920+0 (normal left inverted right x axis y axis) 597mm x 336mm 2560x1440 59.95*+ 1920x1080 60.00 50.00 59.94 1680x1050 59.88 1600x900 59.98 1280x1024 75.02 60.02 1280x800 59.91 1152x864 75.00 1280x720 60.00 50.00 59.94 1024x768 75.08 60.00 832x624 74.55 800x600 75.00 60.32 720x576 50.00 720x480 60.00 59.94 640x480 75.00 60.00 59.94 720x400 70.08 DP2-2 disconnected (normal left inverted right x axis y axis) DP2-3 disconnected (normal left inverted right x axis y axis) HDMI1 disconnected (normal left inverted right x axis y axis) HDMI2 disconnected (normal left inverted right x axis y axis) VIRTUAL1 disconnected (normal left inverted right x axis y axis) This looks relevant : <https://lists.freedesktop.org/archives/intel-gfx/2016-April/091414.html> I'm running kernel 4.6.0-040600rc6-generic (installed as part of the debugging process). (This bug is the 'next step' from <https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1577760>) ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: xorg 1:7.7+13ubuntu3 Uname: Linux 4.6.0-040600rc6-generic x86_64 .tmp.unity_support_test.0: ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: compiz CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0' CompositorUnredirectFSW: true CurrentDesktop: Unity Date: Wed May 4 13:39:08 2016 DistUpgraded: 2016-04-22 10:05:12,580 DEBUG icon theme changed, re-reading DistroCodename: xenial DistroVariant: ubuntu EcryptfsInUse: Yes ExtraDebuggingInterest: Yes, including running git bisection searches GraphicsCard: Intel Corporation Broadwell-U Integrated Graphics [8086:1616] (rev 09) (prog-if 00 [VGA controller]) Subsystem: Lenovo Broadwell-U Integrated Graphics [17aa:2226] InstallationDate: Installed on 2015-05-20 (349 days ago) InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422) MachineType: LENOVO 20CM001QUK ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.6.0-040600rc6-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7 SourcePackage: xorg UpgradeStatus: Upgraded to xenial on 2016-04-22 (12 days ago) dmi.bios.date: 04/06/2015 dmi.bios.vendor: LENOVO dmi.bios.version: N10ET33W (1.12 ) dmi.board.asset.tag: Not Available dmi.board.name: 20CM001QUK dmi.board.vendor: LENOVO dmi.board.version: SDK0E50510 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrN10ET33W(1.12):bd04/06/2015:svnLENOVO:pn20CM001QUK:pvrThinkPadX250:rvnLENOVO:rn20CM001QUK:rvrSDK0E50510WIN:cvnLENOVO:ct10:cvrNone: dmi.product.name: 20CM001QUK dmi.product.version: ThinkPad X250 dmi.sys.vendor: LENOVO version.compiz: compiz 1:0.9.12.2+16.04.20160415-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.67-1 version.libgl1-mesa-dri: libgl1-mesa-dri 11.2.0-1ubuntu2 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 11.2.0-1ubuntu2 version.xserver-xorg-core: xserver-xorg-core 2:1.18.3-1ubuntu2 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.0-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20160325-1ubuntu1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-1build2 xserver.bootTime: Wed May 4 12:49:51 2016 xserver.configfile: default xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.outputs: product id 1079 vendor LGD xserver.version: 2:1.18.3-1ubuntu2 Maybe more details in this bug report : <https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1578196>
Created attachment 123488 [details] dmesg output while booted with drm.debug=0xe 3
I'm sorry about this delay for getting back to you. Could this be related to bug 97031? And have you in any change tested this with newer kernel? If yes then please provide new dmesg.
I've since changed companies (a couple of times) and no longer has access to the harder...so I can't test it. The window for that has long gone :/ FYI I've now switched to using MS Windows (with WSL - aka Bash on Ubuntu on Windows) where it this sort of problem is much less likely to occur (touch wood).
Hello, I just tried to reproduce the problem with following configuration: BDW NUC, using an MST dongle emulating docking station and two external monitors, one connected via DVI and the other one via DP with external Display (Asus) 1920 x 1200. Attaching a Dell display via DVI (1920x 1080). Adding the configuration used to test ====================================== Software ====================================== kernel version : 4.12.0-rc3-drm-tip-ww22-commit-187376e+ architecture : x86_64 os version : Ubuntu 17.04 os codename : zesty kernel driver : i915 bios revision : 5.6 bios release date : 05/11/2017 ====================================== Graphic drivers ====================================== mesa : 17.0.3 modesetting : modesetting_drv.so xorg-xserver : 1.19.3 libdrm : 2.4.76 libva : 1.7.3-2 vaapi (intel-driver) : 1.7.3 cairo : 1.14.8-1 intel-gpu-tools : 1.17-1 ====================================== Hardware ====================================== platform : BDW motherboard id : NUC5i7RYB form factor : Desktop cpu family : Core i7 cpu family id : 6 cpu information : Intel(R) Core(TM) i7-5557U CPU @ 3.10GHz gpu card : Intel Corporation Iris Graphics 6100 (rev 09) (prog-if 00 [VGA controller]) memory ram : 15.58 GB max memory ram : 16 GB cpu thread : 4 cpu core : 2 cpu model : 61 cpu stepping : 4 socket : Socket BGA1168 signature : Type 0, Family 6, Model 61, Stepping 4 hard drive : 111GiB (120GB) current cd clock frequency : 540000 kHz maximum cd clock frequency : 540000 kHz The result is that everything works normally.
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