Bug#674783: xserver-xorg-video-nouveau: Since early 3.x kernel X became very slooow

[Sven Joachim <svenjoac@gmx.de>]

On 2012-05-27 17:57 +0200, Jean-Yves Barbier wrote:

> X became _very_ slow: ie: in a multi-tabs X Terminal, flipping from one
> tab to another (CTRL-PgUP|pgDWN) now takes ~1.3-1.5 second instead
> of beeing instantaneous; editing into a large libreoffice spreadsheet takes
> almost 3 seconds before editing is keyboard available,, lines printing in a
> X Terminal is very slow, etc).
>
> glxinfo doesn't show anything strange (accelerated), regular text consoles
> aren't impacted, but Xorg unexpectively reach 50~75% very often.
>
> I don't have a clue from where it comes: xorg nouveau drv or kernel
> nouveau or any linked libs - may be I missed something important or
> a critical package was removed by an update.

Try downgrading libcairo* packages to 1.10.2 (available from
snapshot.debian.org[1] or squeeze-backports).

Cheers,
       Sven


1. http://snapshot.debian.org/package/cairo/1.10.2-7/