Same happens regularly - dmesg contains loads of: [10046.802408] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0608 data 0x0000060d [10046.802417] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802420] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x060c data 0x00000176 [10046.802429] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802432] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0600 data 0x000003c9 [10046.802441] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802445] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0604 data 0x00000176 [10046.802453] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802457] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0608 data 0x000003ca [10046.802465] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802469] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x060c data 0x00000186 [10046.802515] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802519] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0600 data 0x0000041c [10046.802531] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802535] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0604 data 0x00000176 [10046.802544] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802547] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0608 data 0x0000041d [10046.802556] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802559] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x060c data 0x00000186 [10046.802568] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802571] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0600 data 0x0000046f [10046.802580] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802584] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0604 data 0x00000176 [10046.802593] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802596] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0608 data 0x00000470 [10046.802605] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802608] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x060c data 0x00000186 [10046.802617] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802621] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0600 data 0x000004c2 [10046.802630] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802633] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0604 data 0x00000176 [10046.802642] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802645] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0608 data 0x000004c3 [10046.802654] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802657] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x060c data 0x00000186 [10046.802667] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802670] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0600 data 0x00000515 [10046.802679] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802682] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0604 data 0x00000176 [10046.802691] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802694] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0608 data 0x00000516 [10046.802703] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802706] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x060c data 0x00000186 [10046.802715] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802719] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0600 data 0x00000568 [10046.802728] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802731] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0604 data 0x00000176 [10046.802740] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802743] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0608 data 0x00000569 [10046.802752] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802755] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x060c data 0x00000186 [10046.802764] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802767] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0600 data 0x000005bb [10046.802777] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802780] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0604 data 0x00000176 [10046.802789] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802792] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0608 data 0x000005bc [10046.802801] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802804] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x060c data 0x00000186 [10046.802813] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802817] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0600 data 0x00000000 [10046.802826] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802829] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0604 data 0x00000186 [10046.802838] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802841] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0608 data 0x0000060d [10046.802850] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802853] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x060c data 0x00000187 [10046.802863] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802866] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0600 data 0x000003c9 [10046.802875] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802878] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0604 data 0x00000187 [10046.802887] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802890] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0608 data 0x000003ca [10046.802899] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802902] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x060c data 0x00000197 [10046.802912] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802915] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0600 data 0x0000041c [10046.802924] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802927] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0604 data 0x00000187 [10046.802936] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802939] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0608 data 0x0000041d [10046.802948] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802951] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x060c data 0x00000197 [10046.802961] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802964] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0600 data 0x0000046f [10046.802973] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802976] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0604 data 0x00000187 [10046.802985] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.802988] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0608 data 0x00000470 [10046.802997] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803000] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x060c data 0x00000197 [10046.803009] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803013] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0600 data 0x000004c2 [10046.803022] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803025] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0604 data 0x00000187 [10046.803034] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803037] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0608 data 0x000004c3 [10046.803046] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803049] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x060c data 0x00000197 [10046.803058] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803062] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0600 data 0x00000515 [10046.803071] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803074] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0604 data 0x00000187 [10046.803083] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803086] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0608 data 0x00000516 [10046.803095] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803098] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x060c data 0x00000197 [10046.803107] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803110] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0600 data 0x00000568 [10046.803119] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803123] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0604 data 0x00000187 [10046.803132] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803135] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0608 data 0x00000569 [10046.803144] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803147] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x060c data 0x00000197 [10046.803156] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803159] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0600 data 0x000005bb [10046.803168] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803172] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0604 data 0x00000187 [10046.803181] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803184] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0608 data 0x000005bc [10046.803193] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803196] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x060c data 0x00000197 [10046.803205] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803208] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0600 data 0x00000000 [10046.803217] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803220] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0604 data 0x00000197 [10046.803230] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803233] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0608 data 0x0000060d [10046.803242] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803245] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x060c data 0x00000198 [10046.803254] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803257] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0600 data 0x000003c9 [10046.803266] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803269] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0604 data 0x00000198 [10046.803279] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803282] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0608 data 0x000003ca [10046.803291] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803294] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x060c data 0x000001a8 [10046.803303] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803306] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0600 data 0x0000041c [10046.803316] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803319] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0604 data 0x00000198 [10046.803328] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803331] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0608 data 0x0000041d [10046.803340] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803343] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x060c data 0x000001a8 [10046.803352] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803355] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0600 data 0x0000046f [10046.803365] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803368] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0604 data 0x00000198 [10046.803377] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803380] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0608 data 0x00000470 [10046.803389] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803392] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x060c data 0x000001a8 [10046.803401] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803404] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0600 data 0x000004c2 [10046.803413] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803416] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0604 data 0x00000198 [10046.803425] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803428] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x0608 data 0x000004c3 [10046.803437] nouveau E[ PGRAPH][0000:01:00.0] ILLEGAL_MTHD ILLEGAL_CLASS [10046.803440] nouveau E[ PGRAPH][0000:01:00.0] ch 3 [0x001fb24000 Xorg[19658]] subc 2 class 0x0000 mthd 0x060c data 0x000001a8 [10046.806480] nouveau E[ PFB][0000:01:00.0] trapped write at 0x0000000000 on channel 0x0001fb24 [Xorg[19658]] PGRAPH/DISPATCH/GRCTX reason: DMAOBJ_LIMIT [10047.131817] nouveau E[ PFB][0000:01:00.0] trapped read at 0x0040990000 on channel 0x0001fb24 [Xorg[19658]] PGRAPH/TEXTURE/00 reason: PAGE_NOT_PRESENT
Not sure if I can provide any more useful information since it seems to happen randomly and independently of current keyboard/mouse interaction. The screen just froze without me sitting in front of the box. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xserver-xorg-video-nouveau in Ubuntu. https://bugs.launchpad.net/bugs/1314405 Title: Screen freezes due to Xorg crashed SIGABRT and noveau error Status in “xserver-xorg-video-nouveau” package in Ubuntu: New Bug description: The machine just freezes in my Unity session, sometimes after minutes, sometimes after some hours. Any audio is running about ten minutes longer before the machine either reboots or Xorg is reloaded. Happens daily since updating to 14.04. I cannot change to different terminals to manually reload Xorg, the machine is blocked once the screen freezes. Trying to report the problem via aport-gtk yields an error upon upload: Apr 29 23:03:08 m whoopsie[1380]: message repeated 3 times: [ offline] Apr 29 23:03:08 m whoopsie[1380]: online Apr 29 23:03:08 m whoopsie[1380]: Parsing /var/crash/_usr_bin_Xorg.0.crash. Apr 29 23:03:09 m whoopsie[1380]: Uploading /var/crash/_usr_bin_Xorg.0.crash. Apr 29 23:05:09 m whoopsie[1380]: Sent; server replied with: No error Apr 29 23:05:09 m whoopsie[1380]: Response code: 502 Apr 29 23:05:09 m whoopsie[1380]: Server replied with: Apr 29 23:05:09 m whoopsie[1380]: <html><body><h1>502 Bad Gateway</h1>#012The server returned an invalid or incomplete response.#012</body></html>#012 Apr 29 23:05:09 m whoopsie[1380]: Could not upload; processing later (/var/crash/_usr_bin_Xorg.0.crash). Sometimes I do see the aport-UI after logging in to my unity session, but the screen disappears and my unity session is loaded 1 second later. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2 ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9 Uname: Linux 3.13.0-24-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,decor,snap,place,move,imgpng,mousepoll,grid,gnomecompat,unitymtgrabhandles,resize,vpswitch,regex,wall,session,animation,fade,workarounds,scale,expo,ezoom,unityshell] CompositorRunning: compiz CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0' CompositorUnredirectFSW: true CurrentDesktop: Unity Date: Tue Apr 29 23:19:46 2014 DistUpgraded: 2014-04-24 15:44:51,909 DEBUG enabling apt cron job DistroCodename: trusty DistroVariant: ubuntu DkmsStatus: virtualbox, 4.3.10, 3.13.0-24-generic, x86_64: installed virtualbox, 4.3.10, 3.2.0-61-generic, x86_64: installed EcryptfsInUse: Yes ExtraDebuggingInterest: Yes, if not too technical GraphicsCard: NVIDIA Corporation GT218 [GeForce 210] [10de:0a65] (rev a2) (prog-if 00 [VGA controller]) Subsystem: CardExpert Technology Device [10b0:1401] InstallationDate: Installed on 2010-12-04 (1241 days ago) InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007) MachineType: Gigabyte Technology Co., Ltd. H55M-USB3 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=8270ae71-32ed-493b-b740-b52a09b3b4c3 ro nomdmonddf nomdmonisw nomdmonddf nomdmonisw SourcePackage: xserver-xorg-video-nouveau UpgradeStatus: Upgraded to trusty on 2014-04-24 (5 days ago) dmi.bios.date: 11/01/2010 dmi.bios.vendor: Award Software International, Inc. dmi.bios.version: F11 dmi.board.name: H55M-USB3 dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: x.x dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF11:bd11/01/2010:svnGigabyteTechnologyCo.,Ltd.:pnH55M-USB3:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnH55M-USB3:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr: dmi.product.name: H55M-USB3 dmi.sys.vendor: Gigabyte Technology Co., Ltd. version.compiz: compiz 1:0.9.11+14.04.20140423-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.52-1 version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.0-4ubuntu5 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.0-4ubuntu5 version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2 xserver.bootTime: Tue Apr 29 23:03:06 2014 xserver.configfile: default xserver.devices: input Power Button KEYBOARD, id 6 input Power Button KEYBOARD, id 7 input USB Keyboard KEYBOARD, id 8 input USB Keyboard KEYBOARD, id 9 input ImExPS/2 Logitech Wheel Mouse MOUSE, id 10 xserver.errors: Failed to load module "nvidia" (module does not exist, 0) Failed to load module "nvidia" (module does not exist, 0) xserver.logfile: /var/log/Xorg.0.log xserver.version: 2:1.15.1-0ubuntu2 xserver.video_driver: nouveau To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-nouveau/+bug/1314405/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
