Comment 2 for bug 1886129

[ 341.008336] EXT4-fs (sdb1): mounted filesystem with ordered data mode. Opts: (null)
[ 434.346319] perf: interrupt took too long (2523 > 2500), lowering kernel.perf_event_max_sample_rate to 79250
[ 440.365961] nouveau 0000:01:00.0: fifo: CACHE_ERROR - ch 4 [Xorg[1630]] subc 3 mthd 0208 data 000000cf
[ 440.380700] nouveau 0000:01:00.0: gr: TRAP_MP_EXEC - TP 0 MP 0: 00000010 [INVALID_OPCODE] at 07fac4 warp 19, opcode bffffdde bf7fffff
[ 440.380713] nouveau 0000:01:00.0: gr: TRAP_MP_EXEC - TP 0 MP 1: 00000010 [INVALID_OPCODE] at 07fac4 warp 1, opcode bffffdde bf7fffff
[ 440.380719] nouveau 0000:01:00.0: gr: 00200000 [] ch 4 [000f739000 Xorg[1630]] subc 3 class 8297 mthd 1b0c data 1000f010
[ 1836.468475] perf: interrupt took too long (3154 > 3153), lowering kernel.perf_event_max_sample_rate to 63250

I think first message here is when I mounted the external drive (in thunar) and started opening selected/random files in default apps; first was picture files (jpg, png..), pdf then I selected a video file which is where it went wrong

the nouveau lines are where I believe it went wrong