Created attachment 139226 [details]
errors logged by the kernel
Occasionally when using the Chromium browser, X will freeze. This is accompanied by various errors in the kernel log (see attachment). I can reliably reproduce this by opening the following websites in Chromium:
This is with X server 1.19.6 and xf86-video-nouveau 1.0.15.
I originally saw this with Linux v4.16 and then reverted back to v4.14.35 LTS which didn't seem to exhibit the same problems at first. Also, with v4.16 the freezes seem to be more extensive, often requiring a reboot. With v4.14.35 the freezes are temporary and often even non-existent despite the errors logged by the kernel.
This  patch prevents random xserver freezes
GPU GTX 550Ti
I noted the same behavior with:
 https://patchwork.freedesktop.org/series/41258/ (rev 4)
I'm not sure if it is related, but it's worth mentioning