video problems with Thinkpad T420s integrated intel graphics
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
Linux |
Fix Released
|
Medium
|
Unassigned | ||
linux (Ubuntu) |
Fix Released
|
Medium
|
Unassigned | ||
Natty |
Fix Released
|
Medium
|
Jose Plans | ||
Oneiric |
Fix Released
|
Medium
|
Unassigned |
Bug Description
The framebuffer is corrupted during boot, resulting in a 2/3 black and 1/3 pinstripe pattern on the display (photo attached). This occurs with either a stock natty installation or with linux-lts-
There are three issues that need to be addressed:
1. The framebuffer corruption problem that is unrecoverable. The system is functional and I can login blind. Using git-bisect, I am lead to believe this is fixed in b24e71798871089
2. With the patch from 1 applied, the gdm login screen still doesn't draw properly (no greeter), but I can still login blind and, on lucid, gnome comes up normally and everything is drawn correctly. I believe this is fixed in fe4402931e43e81
3. With the patches from 1 and 2 applied, the machine does not correctly resume from C3 suspend (default lid-close action). Keyboard is unresponsive. I have not identified what patch fixes this but it does not present in Ubuntu-
Changed in linux-lts-backport-natty (Ubuntu): | |
assignee: | nobody → Chris Van Hoof (vanhoof) |
importance: | Undecided → Medium |
status: | New → Triaged |
Changed in linux-lts-backport-natty (Ubuntu): | |
status: | Triaged → Incomplete |
Changed in linux-lts-backport-natty (Ubuntu): | |
assignee: | Chris Van Hoof (vanhoof) → Robert Hooker (sarvatt) |
Changed in linux-lts-backport-natty (Ubuntu): | |
status: | Incomplete → Confirmed |
Changed in linux-lts-backport-natty (Ubuntu Natty): | |
assignee: | nobody → Robert Hooker (sarvatt) |
importance: | Undecided → Medium |
status: | New → Confirmed |
milestone: | none → natty-updates |
Changed in linux: | |
status: | New → Invalid |
affects: | linux-lts-backport-natty (Ubuntu Natty) → linux (Ubuntu Natty) |
Changed in linux (Ubuntu Natty): | |
milestone: | natty-updates → none |
Changed in linux (Ubuntu Oneiric): | |
status: | Confirmed → Fix Released |
Changed in linux: | |
status: | Invalid → Fix Released |
importance: | Undecided → Medium |
Changed in linux (Ubuntu Natty): | |
assignee: | Robert Hooker (sarvatt) → Jose Plans (jplans) |
Changed in linux (Ubuntu Oneiric): | |
assignee: | Robert Hooker (sarvatt) → nobody |
Changed in linux (Ubuntu Natty): | |
status: | Confirmed → Fix Committed |
David -- What lts-backport-natty kernel were you testing at the time of filing this bug? 2.6.38-10.46~lucid1 was released yesterday, which may of of benefit to test.
This does sound quite similar to Bug #761065, where a fix has landed in 2.6.38.8 -stable, and is now applied to the current natty -proposed kernel (2.6.38-11).
... booting with i915.semaphores=1 as a kernel option on builds <= 2.6.38-10 should work around this issue, which would certainly be a great datapoint.
Regards,
Chris