While we're at it, a (bad, sorry) photograph of the screen corruption.
** Attachment added: "Photograph of screen corruption"
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1173074/+attachment/3655340/+files/2013-04-26%2023.08.19.jpg
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And another freeze + corruption, this time just at random during use
(just firefox and gnome-terminal, nothing too special). Once again,
lightdm respawned automatically (with a functional greeter) but the
screen corruption remained, totally freezing after login.
Find attached the relevant excempt
Just accidentally suspended my machine after several hours of uptime -
so here's another dmesg transcript.
It contains some more error messages that I did not see the previous
time. After resume, this time my screen remained black. After about 15
seconds a lot of error messages filled my screen, a
Public bug reported:
Before updating to Raring yesterday, I first fully disabled the Xorg-
edgers PPA (by ppa-purge) and was therefore switched back to the Nouveau
driver. Then updated my system from Quantal to Raring. Afterwards, I
noticed that after a suspend/resume the greeter would not appear
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