https://bugs.freedesktop.org/show_bug.cgi?id=50175
Bug #: 50175
Summary: [regression kernel 3.4] : nouveau detects internal
laptop display as "disconnected" / screen is turned
off
Classification: Unclassified
Product: xorg
Version: unspecified
Platform: x86-64 (AMD64)
OS/Version: Linux (All)
Status: NEW
Severity: major
Priority: medium
Component: Driver/nouveau
AssignedTo: nouveau@lists.freedesktop.org
ReportedBy: mus....@gmail.com
QAContact: xorg-t...@lists.x.org
Created attachment 61914
--> https://bugs.freedesktop.org/attachment.cgi?id=61914
dmesg output
After upgrading from kernel 3.3.6 to 3.4.0 the internal display of my laptop
turns off as soon as the nouveau driver / KMS is loaded. xrandr detects the
LVDS-1 connection as "disconnected" while my external HDMI display works fine.
Downgrading back to 3.3.6 fixes the problem.
Note that this is NOT an Optimus laptop, the integrated Intel graphic chip is
disabled.
Sony Vaio S (VPCS11C5E)
NVIDIA GeForce 310M
Intel Core i5 M520
Arch Linux x64 (testing)
Although I assume this is irrelevant since this is obviously not an X problem:
xorg-server 1.12.1.902
xf86-video-nouveau 0.0.16_git20120512
libdrm 2.4.33
libdrm-nouveau 2.4.34
nouveau-dri 8.0.3
output of dmesg, lspci and xrandr are attached.
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