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I foolishly let the Ubuntu update program do an upgrade to the latest version on my system, now I get the following error:
nouveau Error allocating scanout buffer: -12
Fatal server error: AddScreen/ScreenInit failed for driver0
and it lets me boot into low graphics mode. I did some searching and one suggestion was to rename xorg.conf and let it be rebuilt but I do not have an xorg.conf. I have an xorg.conf.failsafe in /etc, and an xorg.conf.d directory under /usr/lib/X11 but that's it.
any ideas? also here is an lspci as I've seen a lot of threads where that is asked for:
so boot into maintenance mode and run the display or xorg what ever ubuntu does. This will install the nvidia proprietary driver and place a new line on your /etc/modprobe.d/blacklist file blacklist nouveau
at your grub boot menu, hit "e" to edit your ubuntu entry, remove "vga= quiet splash --"
insert "text", then hit cntrl-x to boot
login as user, then do sudo su + password
then edit /etc/modprobe.d/blacklist-framebuffer.conf
and add "blacklist nouveau"
now update the initrd so it adds the new .conf to the initrd
update-initramfs -u -v -k all
reboot, then you should be able to get to X and install nvidia driver
or use the boot option "xforcevesa" to load the vesa module if all else fails
This made it just get stuck in command line mode, the error log said GDM failed to start too many times. I removed the blacklist command and re-ran the initramfs command and I was able to get back into X in low-graphics mode? any other ideas?
I will let you know UBUNTU when you install the proprietary nvida driver during recovery mode start up the post install script handles the blacklist and the grub2. at boot you go to grub push the Esc key then toggle down to recovery mode then go to display set up and install the proprietary driver.