[G45] i915.modeset=1 causes black screen instead of gdm (UXA bug) (KMS)
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
xf86-video-intel |
Invalid
|
Medium
|
|||
xserver-xorg-video-intel (Ubuntu) |
Invalid
|
High
|
Unassigned |
Bug Description
If I add "i915.modeset=1" as a kernel boot parameter on a machine with this
config:
00:02.0 VGA compatible controller [0300]: Intel Corporation 4 Series Chipset
Integrated Graphics Controller [8086:2e22] (rev 03)
Linux kingfish 2.6.30-
2009 x86_64 GNU/Linux
libdrm2 2.4.9-1ubuntu1~
xserver-
libgl1-mesa-dri 7.4-0ubuntu3
libgl1-mesa-glx 7.4-0ubuntu3
(**) intel(0): Using UXA for acceleration
Then basically I never get to gdm, instead I just get a black screen. If I ssh
into the box and gdb into X then I see it stuck indefinitely in an ioctl(). I
added INTEL_DEBUG=batch at the top of the gdm script and then rebooted, same
thing happened so I captured a batch buffer dump for this freeze.
Changed in xserver-xorg-video-intel: | |
status: | Unknown → Confirmed |
Changed in xserver-xorg-video-intel: | |
status: | Confirmed → Invalid |
Changed in xserver-xorg-video-intel: | |
importance: | Unknown → Medium |
Changed in xserver-xorg-video-intel: | |
importance: | Medium → Unknown |
Changed in xserver-xorg-video-intel: | |
importance: | Unknown → Medium |
Created an attachment (id=25396)
dmesg captured using ssh while frozen