Hi there, It seems that one cause for the behavior that you've described is your file system being mounted as read-only. This happened to me a few times after a power surge, or a forced reboot. Maybe is completely unrelated to X or the nv or nvidia driver. Just in case, please reboot your machine and boot on the safe kernel - usually the second option on grub. Then run manually a fsck on your disk. After that, just issue a mount -a and reboot. The next time your system reboots, your file system should be read-write, and everything should be back to normal.
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