Description of problem:
Without any obvious cause, the screen will become severely corrupted, so much so that it's not even possible to see how many windows are open - and in one case, the corruption was followed by simple white and black vertical bars.
When the screen corrupts, the machine freezes and only a hard reset works.
Happens infrequently - a month between occurrences - but the hard freezes can lead to data loss.
Version-Release number of selected component (if applicable):
This has happened under kernels 4.19.4-200.fc28.x86_64
OS is Fedora 28 using cinnamon.
CPU: Topology: Quad Core model: Intel Core2 Quad Q9450 bits: 64 type: MCP L2 cache: 6144 KiB
Speed: 1999 MHz min/max: 2000/2667 MHz Core speeds (MHz): 1: 1995 2: 1995 3: 2255 4: 2006
Graphics: Device-1: NVIDIA G92GL [Quadro FX 3700] driver: nouveau v: kernel
Display: server: Fedora Project X.org 1.19.6 driver: modesetting unloaded: fbdev,vesa resolution: 1920x1200~60Hz
OpenGL: renderer: NV92 v: 3.3 Mesa 18.0.5
Seems not to have an obvious cause, although I've noticed that a lot of windows are open at the time it happens.
Because it causes a hard freeze, the journal is often useless, but on one occasion, I got this as the penultimate line (the last actual line being just the kernel listing all the loaded modules):
kernel: WARNING: CPU: 1 PID: 0 at drivers/gpu/drm/nouveau/nvkm/subdev/mc/base.c:72 nvkm_mc_intr+0x163/0x180 [nouveau]
The video corruption and this line make me believe that this is really a nouveau issue.
Machine has been running Fedora for at least 5 years (being upgraded of course) and hibernates without a problem.
This message is a reminder that Fedora 28 is nearing its end of life.
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