I get a freeze during boot that I think is caused by this:
30.813] (EE) NVIDIA(GPU-0): The NVIDIA kernel module does not appear to be receiving
30.813] (EE) NVIDIA(GPU-0): interrupts generated by the NVIDIA GPU at PCI:2:0:0.
30.813] (EE) NVIDIA(GPU-0): Please see Chapter 8: Common Problems in the README for
30.813] (EE) NVIDIA(GPU-0): additional information.
The freeze gives me a blank screen with cursor but completely unresponsive to anything other than hard reboot.
I have not had the problem in the last few days so its possible that a recent driver update date had fixed it. I usually only reboot once a day so it could just be luck.
I would:
Delete all nvidia-driver-pacckages from Repo, disable the Repo, download the latest nvidia-driver from here: http://download.nvidia.com/XFree86/Linux-x86_64/
make the driver executable (chmod +x), boot to Runlevel 3 (multiuser.target) and install the downloaded driver.
I have got a few upgrades since the above, and the driver is the same version as the latest on the download page. Is it still worth trying installing manually?
It turned out to be pretty much that, but not quite.
I had disabled interrupt remapping (VT-D) because I knew there were issue with it, but the driver picked up that there were problems and worked around them.
Re-enabling it made the problems go away.
I do get an occasional “graphics restart” or two in KDE after wake from suspend, but it recovers in seconds so is just an irritant (especially as the machine is a desktop).