The full workaround sequence is the one I posted in the updated
description, not the comments. (There's no such package as just
"nouveau", so sudo apt-get remove nouveau won't do anything, and the
drivers dialog does a remove not the here-required purge.)
I also have the "nouveau W[ PFIFO][:
Also affected on a Hewlett-Packard HP Compaq dc7800p Convertible
Minitower/0AACh, BIOS 786F1 v01.32 07/21/2011 with nvidia GeForce GT 520
board.
Workarounds by Rebecca Palmer at #5 (many thanks!) did not entirely
suffice: Had to additionally add "blacklist nouveau" to
/etc/modprobe.d/blacklist.con
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: nvidia-graphics-drivers-331 (Ubuntu)
Status: New => Confirmed
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Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: xserver-xorg-video-nouveau (Ubuntu)
Status: New => Confirmed
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Found how nouveau was being loaded while blacklisted: it's in the
initramfs and nvidia-331_hybrid.conf wasn't.
This can be fixed by updating the initramfs (sudo update-initramfs -u,
assuming the kernel you are currently running is the one you want to use
nvidia-331 with), but my system also seems
I've found out how /etc/modprobe.d/nvidia-331_hybrid.conf disappeared:
nvidia-331's postrm explicitly deletes it, but as it's a conffile
reinstalling nvidia-331 doesn't put it back. However, having it present
doesn't fix the main bug.
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The NVRM log messages stopped after reinstalling nvidia-331, but the
system continued to use nouveau, and hence to crash (bug 1243557).
> modified.conffile..etc.modprobe.d.nvidia.331.hybrid.conf: [deleted]
I don't know how that (which blacklists nouveau) came to be missing, but
purging and re-ins
** Attachment added: "kern.log"
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-nouveau/+bug/1315156/+attachment/4102693/+files/kern.log
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