I've had exactly the same problem described above. Installed Nvidia drivers via
via Additional Drivers and all was working fine.
After that I decided to remove the Nvidia drivers and rebooted the laptop. My
screen resolution was set as 640x480, without any possibility of changing it.
Asking for help, on #ubuntu+1 @ Freenode, someone told me to check
/etc/modprobe.d for a nvidia conf file. I've done that and it was there.
Deleting the file and rebooting the laptop solved the issue.
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to nvidia-graphics-drivers-340 in Ubuntu.
Uninstall left nouveau blacklisted
Status in nvidia-graphics-drivers-340 package in Ubuntu:
Following a successful install and subsequent use of nvidia-340 -
uninstallation of nvidia via Additional Drivers led to a reboot to a
desktop at 640x480 px.
Investigation found an nvidia created file left on the system
blacklisting nouveau, deleted file and rebooted to normal desktop.
Didn't think about ubuntu-reporting this - can try and replicate and
apport-collect if it's of any use.
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