Comment 26 for bug 1158689

I am having the same problems post kernel version 3.7.0 with a GeForce 8800 GTS. Even glxgears will lock up.

I get a ton of these messages:
[ 83.399004] nouveau [ PFIFO][0000:01:00.0] CACHE_ERROR - Ch 2/3 Mthd 0x108c Data 0x2036652f

with the occasional:
[ 83.418650] nouveau E[ PGRAPH][0000:01:00.0] TRAP_MP_EXEC - TP 4 MP 1: INVALID_OPCODE at 07f4d8 warp 2, opcode 0423c788 10000811
[ 83.418659] nouveau [ PGRAPH][0000:01:00.0] TRAP
[ 83.418663] nouveau E[ PGRAPH][0000:01:00.0] ch 4 [0x0027948000] subc 3 class 0x5097 mthd 0x0f04 data 0x00000000
[ 83.418672] nouveau E[ PFB][0000:01:00.0] trapped read at 0x0000000000 on channel 0x00027948 PFIFO/PFIFO_READ/SEMAPHORE reason: DMAOBJ_LIMIT
[ 83.431368] nouveau E[ PGRAPH][0000:01:00.0] TRAP_MP_EXEC - TP 4 MP 1: INVALID_OPCODE at 07f4d8 warp 2, opcode 0423c788 10000811
[ 83.431376] nouveau [ PGRAPH][0000:01:00.0] TRAP
[ 83.431379] nouveau E[ PGRAPH][0000:01:00.0] ch 4 [0x0027948000] subc 3 class 0x5097 mthd 0x0f04 data 0x00000000