Public bug reported:
Hi. I hope this is the right place to report this bug.
I'm running ubuntu 12.04 on a laptop with sandy bridge hardware, switchable
graphics (intel HD3000 / AMD HD 6770m). I use the latest version of fglrx
(12.2) to manage switching between discrete and integrated gpus.
It seems that composited environments like unity3d or gnome-shell won't load
from gdm or lightdm when I'm using the integrated GPU. It will log me in but it
will just display the background but nothing else.
However I'm able to reload it from tty with "DISPLAY=:0.0 gnome-shell
--replace" or "DISPLAY=:0.0 unity --replace" and the environment will be fully
functionnal.
Here are some informations about my setup:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor
i915.i915_enable_fbc=1 i915.i915_enable_rc6=1"
uname -a
Linux zapo-notebook 3.3.0-030300rc7-generic #201203101735 SMP Sat Mar 10
22:36:28 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
lsb_release -rd
Description: Ubuntu precise (development branch)
Release: 12.04
xserver-xorg-video-intel:
Installed: 2:2.17.0-1ubuntu4
Candidate: 2:2.17.0-1ubuntu4
Version table:
*** 2:2.17.0-1ubuntu4 0
500 http://ca.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages
100 /var/lib/dpkg/status
xserver-xorg:
Installed: 1:7.6+10ubuntu1
Candidate: 1:7.6+10ubuntu1
Version table:
*** 1:7.6+10ubuntu1 0
500 http://ca.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages
100 /var/lib/dpkg/status
** Affects: ubuntu
Importance: Undecided
Status: New
** Tags: gnome-session i915 sandybridge xserver-xorg
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https://bugs.launchpad.net/bugs/954021
Title:
composited desktop environments wont autoload from gdm/lightdm when
using i915
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