radeon driver crashes (freezing the system) on 11.04 when forcing KMS on Power G5

[Sergey V. Udaltsov]

Body:

I enforced KMS by specifying radeon.modeset=1.
Unity does not start at all. Metacity starts but gnome-panel kills the
machine, somewhere inside radeon driver. See the last messages from
/var/log/syslog: http://pastebin.com/6JLUCZXq

 affects ubuntu

[Sergey V. Udaltsov (sergey-udaltsov)]

BTW, I had to put (manually) the following into /etc/modules:

radeon
drm
drm_kms_helper

otherwise in Xorg.0.log:

[ 53.714] (EE) RADEON(0): [dri] RADEONDRIGetVersion failed because of a version mismatch.
[dri] This chipset requires a kernel module version of 1.17.0,
[dri] but the kernel reports a version of 2.8.0.[dri] If using legacy modesetting, upgrade your kernel.
[dri] If using kernel modesetting, make sure your module is
[dri] loaded prior to starting X, and that this driver was built
[dri] with support for KMS.
[dri] Disabling DRI.

In that case, no acceleration - and no crashes.

[penalvch (penalvch)]

Sergey V. Udaltsov, thank you for reporting this and helping make Ubuntu better.

As per https://wiki.ubuntu.com/Releases, Ubuntu 11.04 reached EOL on October 28, 2012.

Is this reproducible in a supported release?

[Launchpad Janitor (janitor)]

[Expired for xorg (Ubuntu) because there has been no activity for 60 days.]