Summary: | [snb DP dongle] Blank screen after displayport re-hotplug on MBA4,1 | ||||||||||||||||
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Product: | DRI | Reporter: | David.Cock | ||||||||||||||
Component: | DRM/Intel | Assignee: | Intel GFX Bugs mailing list <intel-gfx-bugs> | ||||||||||||||
Status: | CLOSED WORKSFORME | QA Contact: | Intel GFX Bugs mailing list <intel-gfx-bugs> | ||||||||||||||
Severity: | normal | ||||||||||||||||
Priority: | medium | CC: | ben, chris, daniel, David.Cock, jbarnes | ||||||||||||||
Version: | DRI git | ||||||||||||||||
Hardware: | x86-64 (AMD64) | ||||||||||||||||
OS: | Linux (All) | ||||||||||||||||
Whiteboard: | |||||||||||||||||
i915 platform: | i915 features: | ||||||||||||||||
Attachments: |
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Created attachment 54336 [details]
intel_reg_dumper output before
Created attachment 54337 [details]
intel_reg_dumper output after
Created attachment 54338 [details]
xorg log
Created attachment 54339 [details]
VBIOS dump before
Created attachment 54340 [details]
VBIOS dump after
Shot in the dark: Can you please test the below patch? It should apply on top of drm-intel-nightly. http://cgit.freedesktop.org/~danvet/drm/commit/?h=pll-limits-mess&id=64ac8695df0df5e9937da1b55ddb0e3fa37e6258 David, ping. Have you tried the latest kernels, and/or Daniel's patch? Sorry, I'd forgotten about this bug report. I can confirm that the problem is resolved in recent kernels. Specifically, running 3.2.46-1+deb7u1 and xorg intel driver 1.12.3.902, hotplugging now works correctly. (In reply to comment #8) > Sorry, I'd forgotten about this bug report. Well, uh, looks like we'd forgotten about it a few times too... Sorry. > I can confirm that the problem > is resolved in recent kernels. Specifically, running 3.2.46-1+deb7u1 and > xorg intel driver 1.12.3.902, hotplugging now works correctly. Thanks for the confirmation. |
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Created attachment 54335 [details] dmesg output after triggering When an external monitor (DVI via. displayport and Apple DP->DVI dongle) is disconnected, re-probing the connected displays fails and one is left with a blank display on the laptop panel, which xrandr --auto fails to restore. If the X server is killed and restarted, displays are probed correctly and the system is usable. chipset: Sandybridge mobile (GT2) system architecture: x86_64 software versions: xf86-video-intel = 2.17.0 xorg = 1.11.1.902 (1.11.2 RC 2) libdrm = 2.4.27 mesa = 7.11-6 kernel version: 3.2.0-rc2i915drm-00143-ga767835 Linux distribution: Debian (wheezy) machine: MacbookAir4,1 (mid-2011 11") display connector: Displayport (eDP1) Steps to reproduce: * Connect (via Displayport) and enable (xrandr --auto) external display. * Disconnect Displayport connector. Additional info: Problem exists in Debian kernel 3.0.0-1-amd64 also.