If you’re suffering from desktop freezes and you’re using the nouveau (free nvidia) graphics driver, there’s a bug that could be the culprit.
When your desktop freezes, try to log in using ssh and run dmesg (or grab the logs with journalctl) and check for this line:
nouveau: PFIFO still angry after 101 spins, halt
Here’s the description of this bug: https://bugs.freedesktop.org/show_bug.cgi?id=87244
Until the fix reaches the kernel, you have to solutions:
- Use the linux-lts kernel
- Use the nvidia proprietary driver