[Bug 62771] New: Screen turns to coloured snowstorm (or blanks) when KMS kicks in
bugzilla-daemon at freedesktop.org
bugzilla-daemon at freedesktop.org
Tue Mar 26 09:32:22 PDT 2013
https://bugs.freedesktop.org/show_bug.cgi?id=62771
Priority: medium
Bug ID: 62771
Assignee: intel-gfx-bugs at lists.freedesktop.org
Summary: Screen turns to coloured snowstorm (or blanks) when
KMS kicks in
QA Contact: intel-gfx-bugs at lists.freedesktop.org
Severity: critical
Classification: Unclassified
OS: Linux (All)
Reporter: mrdemeanour at jackpot.uk.net
Hardware: x86-64 (AMD64)
Status: NEW
Version: XOrg CVS
Component: DRM/Intel
Product: DRI
Created attachment 77065
--> https://bugs.freedesktop.org/attachment.cgi?id=77065&action=edit
dmesg with drm.debug=0xe
Linux boots, but display 'fails' when i915 KMS kicks in. Console input is
possible, and system is useable via ssh; X can be launched from console.
'Fails': on tested 2.6 and 3.2 kernels, the entire screen is taken over by a
colourful snowstorm. On 3.8.4, the snowstorm flashes briefly then the screen
blanks; disconnecting and reconnecting the display again yields a colourful
snowstorm. Launching X will also transform the black screen into a snowstorm.
I've tried with built-in i915 (fails on transition from initrd), loadable
module (fails when i915 loads), and with i915 in initrd (fails immediately).
The system is a Acer Revo RL80, which has only DVI-I output. The display is a
projector with native resolution 1024x576.
With KMS disabled in the kernel, the failure doesn't occur; but i915 cannot be
used for X.
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