Regression in Intel video support

[Rob_H]

I have an Intel HD 4000 video chipset on an HP Pavilion dv7t Quad Edition laptop. A few days ago (running Kubuntu 12.04), I got updates to a number of X11 packages from the ubuntu-x-swat/x-updates PPA (stable X updates). After rebooting, my desktop display became corrupt or blanked out entirely after short periods of use and performance was noticeably slower. Assuming I got burned by the PPA, I decided to reformat and upgrade to 12.10. So I ran the live USB and everything seemed fine. But once 12.10 was installed (and all updates had been applied), the same corruption started happening again! Has anyone else noticed a regression in Intel video support? I assume it's a driver issue, but hard to tell because a number of X11 packages got upgraded at once.

[OneLine]

With the new releases there are the release notes...

http://www.kubuntu.org/
-> http://www.kubuntu.org/news/12.10-release
--> https://wiki.ubuntu.com/QuantalQuetz...eNotes/Kubuntu

Known Issues
...
(1061073) Desktop effects are slow and desktop corruption using mesa 9
Workaround by downgrading to old mesa packages
...

https://bugs.launchpad.net/ubuntu/+s...a/+bug/1061073

This seems to hit the Intel hardware: http://www.kubuntuforums.net/showthr...ts-Intel-video

[Rob_H]

Thanks. I think this is it exactly. And shame on me for not reading the Known Issues list more closxely.

[Rob_H]

OTOH, it's disappointing that the Ubuntu devs chose to upgrade Mesa when it's clearly causing problems for a lot of people, not just on KDE. The workaround (downgrading Mesa) caused problems for me when I subsequently installed Bumblebee for NVIDIA Optimus support. So I'm back to Kubuntu 12.04 for now.

[cloudslayer]

Hi,

I seem to be suffering from the same issue. The linked bug report mentions a workaround (installing Mesa 8.x):

"As described in bug 1042211 I downloaded the 8.0.4 version of mesa from https://launchpad.net/ubuntu/+source...8.0.4-1ubuntu1. This fixed the problem for me."

Does anyone know which files I should download from there (kubuntu 64 bit 12.10)

[Rob_H]

The bug report tells you which packages you need to downgrade, but I wouldn't bother because it looks like the fix is going to be rolled out to the update repo soon anyway.