Unity crashes at login with nouveau driver

[Marc Deslauriers]

On a Thinkpad T61, it isn't possible to log in with Quantal. When Unity comes up, dmesg fills up with INVALID_OPCODE errors and the session hangs.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: xorg 1:7.7+1ubuntu3
ProcVersionSignature: Ubuntu 3.5.0-14.15-generic 3.5.3
Uname: Linux 3.5.0-14-generic x86_64
ApportVersion: 2.5.1-0ubuntu7
Architecture: amd64
Date: Tue Sep 11 08:32:44 2012
DistroCodename: quantal
DistroVariant: ubuntu
GpuHangFrequency: Continuously
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120724.2)
ProcEnviron:
 LANGUAGE=en_CA:en
 TERM=linux
 PATH=(custom, no user)
 LANG=en_CA.UTF-8
 SHELL=/bin/bash
SourcePackage: xorg
Symptom: display
Title: Xorg freeze
UpgradeStatus: No upgrade log present (probably fresh install)

[Marc Deslauriers (mdeslaur)]

The quantal beta 1 live cd also fails to boot on this laptop, screen comes up in a garbled checkerboard pattern, and dmesg is full of "PFIFO_CACHE_ERROR" messages.

[Bryce Harrington (bryce)]

Bug in the nouveau drm I'm guessing. Might try booting newer/older/mainline kernels.

[Didier Roche-Tolomelli (didrocks)]

Bryce, can yo uhave a closer look at it, please for the xorg side? Thanks :)

[Marc Deslauriers (mdeslaur)]

This regressed somewhere between alpha 3 and beta 1.

Booting on the alpha 3 kernel doesn't help.

[Marc Deslauriers (mdeslaur)]

This still happens when trying to boot the beta 2 live cd on nvidia hardware. See attached photo.

[Marc Deslauriers (mdeslaur)]

This may be a dupe of 1043518

[Marc Deslauriers (mdeslaur)]

Confirmed dupe of 1043518. 20120930 iso works fine.