From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 58021] New: [BISECTED] nouveau, nv50: External VGA not detected
anymore
Date: Sun, 12 May 2013 09:25:53 +0000 (UTC)
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https://bugzilla.kernel.org/show_bug.cgi?id=58021
Summary: [BISECTED] nouveau, nv50: External VGA not detected
anymore
Product: Drivers
Version: 2.5
Kernel Version: 3.7.0-rc4+ - 3.9
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Video(DRI - non Intel)
AssignedTo: drivers_video-dri@kernel-bugs.osdl.org
ReportedBy: wippbox@gmx.net
Regression: No
Created an attachment (id=101211)
--> (https://bugzilla.kernel.org/attachment.cgi?id=101211)
dmesg for last good commit
I have a lenove thinkpad T61p with a NVIDIA Corporation G84GLM [Quadro FX
570M].
When connecting my external VGA monitor my monitor is no more detected
properly:
> cat /sys/class/drm/card0-VGA-1/status
gives now "disconnected"
Last good commit is
ef22c8bb7b3fac45919b7fde412d36d1a8367d51
drm/nv50/disp: call into core to handle dac/sor power state changes
First bad commit is
7ebb38b556485449bfaa506a196439f6a6fd6ebd
drm/nv50/disp: call into core for dac load detection
The responsible function is
nv50_dac_detect in drivers/gpu/drm/nouveau/nv50_dac.c (moved to
drivers/gpu/drm/nouveau/nv50_display.c in more recent kernels).
Also tried a 3.9.1 kernel. The problem still remains.
However, replacing nv50_dac_detect with the corresponding version from the last
good commit fixed the problem (tried a 3.8.10 kernel).
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