[Nouveau] [Bug 27706] Blank screen and "Error referencing VRAM ctxdma: -12" on NV44A with ubuntu lucid beta 2 (worked in alpha 3)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=27706

--- Comment #11 from mossroy.mossroy at gmail.com 2010-04-16 15:31:56 PDT ---
Regarding the version number of libdrmnouveau1, normally ubuntu uses a prefix
for the version upstream, and a suffix for the patches it applies on it.
So, I suppose it is based on version 2.4.18 (
http://cgit.freedesktop.org/mesa/drm/tag/?id=2.4.18 )
The changelog of ubuntu patches are there :
http://changelogs.ubuntu.com/changelogs/pool/main/libd/libdrm/libdrm_2.4.18-1ubuntu3/changelog
The difference between version "ubuntu2" and "ubuntu3" seems to be the
correction of this bug :
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-nouveau/+bug/547124
, that did not apparently affect me, and that corresponds to the following
commit :
http://cgit.freedesktop.org/mesa/drm/commit/?id=df32c307e8f81b46ee8aa4dd7222fc18f175bbb3
Not sure if it's really relevant in our case.

Maybe version alpha3 of ubuntu had the option "nouveau.noaccel=1" by default,
and not in version beta2? Which would explain the difference of behavior even
if the versions are very close.

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