Comment 4 for bug 925048

The nvc0_fifo_isr() routine is essentially called from a signal handler so it's not possible for me to trace back in the kernel what triggers it to get called. I've reviewed recent git changes in drm/nouveau; nothing jumps out to me but I'm not a nouveau guru. I don't think testing an older kernel (like whatever you were running previously) would help, but certainly couldn't hurt.

There are no bug reports filed about this issue upstream, so I forwarded this one up. If we don't get a response, then it might be worthwhile for you to approach ben skeggs directly via IRC on #nouveau.