Seems that it is a problem with Nouveau drivers that is known. Yesterday I discovered that in softwaresources I could now select the old Nvidia 173 driver. This solved all my problems instantly: no freezes, no artefacts and reasonable speed. For me the bug is purely 'academic' now.
At least others who for some reasons are stuck with the Nouveau driver it is possible to reduce the impact of this bug: see my previous post. ** Attachment removed: "Schermafdruk van 2013-02-02 13:58:58.png" https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-nouveau/+bug/1113454/+attachment/3511743/+files/Schermafdruk%20van%202013-02-02%2013%3A58%3A58.png -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xserver-xorg-video-nouveau in Ubuntu. https://bugs.launchpad.net/bugs/1113454 Title: Artefacts with nouveau driver Status in “xserver-xorg-video-nouveau” package in Ubuntu: New Bug description: On my laptop, Acer Aspire 7520 with a Geforce 8400m G graphics card I can't get the nvidia driver working correctly: this driver crashes my system (brings it to a total freeze, not abililty to start another session or reboot) totally at least 3 times a day. With Nouveau drivers it seems to work fine, but after some time, I get artefacts in programs, on the desktop and the unity bar. It gets unusable very fast. Restarting X solves the problem, but causes (obviously) a restart of all running apps. I have added x-edgers ppa instead of the regular source, but this brings only a very slight improvement (at least so it seems), Well, I have includes a screenshot of my messed up desktop. I have seen that this was a problem in the past as well (found some bug reports for plain vanilla debian). To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-nouveau/+bug/1113454/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
