I have a Dell Ultrabook E7440 using one of the Dell ePort docking stations with dual DVI outputs on it. Periodically my screen will reset, almost like the resolution was changed. This only happens on the 2 monitors connected via DVI. the Xorg logs do not show any relevant information. I upgraded to kernel 3.19.0-rc2 when the issue started occuring. I was originally running an older kernel that did not natively support both monitors. I had to use a modified libXinrama to span the display across both monitors. Now, with 3.19, both monitors are properly detected, but this reset is rather annoying. I believe this may be related to this bug: https://bugs.freedesktop.org/show_bug.cgi?id=72795 Let me know what information needs to be provided to look into this.
If you have xf86-video-intel-2.99.917 then the Xorg.0.log will be interesting just to check nothing is recorded. What wil be most useful I guess will be a drm.debug=6 dmesg from across the event.
Created attachment 111567 [details] Xorg.0.log
(In reply to Chris Wilson from comment #1) > If you have xf86-video-intel-2.99.917 then the Xorg.0.log will be > interesting just to check nothing is recorded. What wil be most useful I > guess will be a drm.debug=6 dmesg from across the event. I'm actually running 2.99.916. Thats the latest my distro (opensuse) provided. I will try upgrading it and seeing if that has any effect. I've attached my Xorg.0.log anyways. As I said, it doesn't really have anything useful in it. I've pasted my xrandr below as well to show my display configuration. I'll check on the drm.debug and followup shortly with my findings. Thanks flaszlo@odin:/var/log> xrandr Screen 0: minimum 8 x 8, current 5760 x 1080, maximum 32767 x 32767 eDP1 connected 1920x1080+3840+0 (normal left inverted right x axis y axis) 309mm x 174mm 1920x1080 60.02*+ 1400x1050 59.98 1280x1024 60.02 1280x960 60.00 1024x768 60.00 800x600 60.32 56.25 640x480 59.94 DP1 disconnected (normal left inverted right x axis y axis) DP2 connected primary 1920x1080+1920+0 (normal left inverted right x axis y axis) 477mm x 268mm 1920x1080 60.00*+ 1280x1024 75.02 60.02 1152x864 75.00 1024x768 75.08 60.00 800x600 75.00 60.32 640x480 75.00 60.00 720x400 70.08 DP3 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 477mm x 268mm 1920x1080 60.00*+ 1280x1024 75.02 60.02 1152x864 75.00 1024x768 75.08 60.00 800x600 75.00 60.32 640x480 75.00 60.00 720x400 70.08 DP4 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)
Created attachment 111575 [details] dmesg
(In reply to Chris Wilson from comment #1) > If you have xf86-video-intel-2.99.917 then the Xorg.0.log will be > interesting just to check nothing is recorded. What wil be most useful I > guess will be a drm.debug=6 dmesg from across the event. Ok. Upgraded to 2.99.917, and enabled drm.debug in my boot options. I've attached the dmesg output. I ran dmesg immediately after I noticed a screen reset. Let me know if there is anything else you would like me to try. Thanks for your help.
FYI. This issue is still occurring. We can reproduce on several E7440 laptops in the office. It seems to popup on kernels >= 3.19. I've tried all the way up to the latest stable version (4.2.4) with the same results. I consider myself pretty handy when it comes to UNIX/Linux, but this one has me puzzled. As far as I can tell, there is either a bug in the driver, or a problem with the hardware docks. I've tried several docks with the same result. Oddly enough, we have some users with the E7450, one model newer, who do not have this problem at all.
Bug scrub: Decrease priority.
Thanks for reporting the issue. Are you still seeing this with the latest kernel? Can you please try the drm-intel-nightly kernel and attach dmesg with drm.debug=0x1e?
Created attachment 124937 [details] attachment-8252-0.html Hello, Actually. I stopped using the docking station since I could not find a viable workaround. I can attempt to test in the next couple weeks to see if the issue is resolved. Thanks On Wed, Jul 6, 2016 at 2:46 PM, <bugzilla-daemon@freedesktop.org> wrote: > *Comment # 8 <https://bugs.freedesktop.org/show_bug.cgi?id=87869#c8> on > bug 87869 <https://bugs.freedesktop.org/show_bug.cgi?id=87869> from > Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com> * > > Thanks for reporting the issue. Are you still seeing this with the latest > kernel? > Can you please try the drm-intel-nightly kernel and attach dmesg with > drm.debug=0x1e? > > ------------------------------ > You are receiving this mail because: > > - You reported the bug. > >
Great, thanks!
Has there been an opportunity to retest? What was seen using the latest upstream driver?
Timeout - marking resolved+worksforme. Please reopen if problem still exists with the latest kernel from drm-tip.
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