[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 #6 from mossroy.mossroy at gmail.com 2010-04-16 15:10:55 PDT ---
Thanks Xavier and Marcin for your quick answers.

Xavier, I had noticed the extra lines regarding AGP x8 (see
https://bugs.launchpad.net/nouveau/+bug/564617/comments/3).
What is sure is that I did not touch anything inside the PC, or in the BIOS.

Is there an easy way to test with an upstream version of nouveau? I might run a
liveCD, or even install another OS if it's really necessary.

Marcin,
I tried the "video=vga16fb:off" parameter : I can see the ubuntu logo, but then
I only see grey lines on the screen (see attached photo)
Then, the PC seems frozen : I can only do a hard power-off
You'll find the dmesg and corresponding kern.log attached

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