Bug 27230

Summary: [105M / Acer] Bad EDID causes nouveau to fail on Acer Extensa 5635G laptop
Product: xorg Reporter: Christopher James Halse Rogers <chalserogers>
Component: Driver/nouveauAssignee: Nouveau Project <nouveau>
Status: RESOLVED FIXED QA Contact: Xorg Project Team <xorg-team>
Severity: normal    
Priority: medium CC: igadmile, piotrdrag
Version: unspecified   
Hardware: Other   
OS: All   
i915 platform: i915 features:

Description Christopher James Halse Rogers 2010-03-21 15:05:17 UTC
Forwarded from launchpad: https://bugs.edge.launchpad.net/ubuntu/+source/xserver-xorg-video-nouveau/+bug/540632

Nouveau fails to drive the LVDS screen of an Acer Extensa 5635G laptop.  This seems to be due to the laptop having a corrupt EDID.

The latest nvidia beta drivers seem to have a quirk for it, and there's a corrected EDID available here: http://www.nvnews.net/vbulletin/showpost.php?p=2167144&postcount=13

Xorg log: http://launchpadlibrarian.net/41226284/Xorg.0.log
dmesg: http://launchpadlibrarian.net/41226414/dmesg
Comment 1 Piotr Drąg 2010-03-24 08:36:02 UTC
IANAXD (I Am Not A X Developer), but these patches *might* fix this:

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=7064fef56369c9e2c6e35ff6d6b4b63d42a859ce (upstream since 2.6.32)

http://git.kernel.org/?p=linux/kernel/git/airlied/drm-2.6.git;a=commit;h=44fef22416886a04d432043f741a6faf2c6ffefd (pending upstream, probably will go to 2.6.35)
Comment 2 Christopher James Halse Rogers 2010-03-25 15:31:42 UTC
Thanks for that pointer; the second patch does fix it for the reporter.

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