Comment 32 for bug 1158689

HI again, in addition some error messages

Nov 29 11:21:47 torsten-LIFEBOOK-E8410 kernel: [ 66.215782] nouveau E[ PGRAPH][0000:01:00.0] ch 2 [0x0007b23000] subc 7 class 0x8297 mthd 0x15e0 data 0x00000000
Nov 29 11:21:47 torsten-LIFEBOOK-E8410 kernel: [ 66.304180] nouveau E[ PGRAPH][0000:01:00.0] TRAP_MP_EXEC - TP 0 MP 0: INVALID_OPCODE at 000004 warp 10, opcode ffb9c1d8 ffbac2d9
Nov 29 11:21:47 torsten-LIFEBOOK-E8410 kernel: [ 66.304188] nouveau E[ PGRAPH][0000:01:00.0] TRAP
Nov 29 11:21:47 torsten-LIFEBOOK-E8410 kernel: [ 66.304193] nouveau E[ PGRAPH][0000:01:00.0] ch 2 [0x0007b23000] subc 7 class 0x8297 mthd 0x15e0 data 0x00000000
Nov 29 11:21:47 torsten-LIFEBOOK-E8410 kernel: [ 66.304477] nouveau E[ PGRAPH][0000:01:00.0] TRAP_MP_EXEC - TP 0 MP 0: INVALID_OPCODE at 000004 warp 10, opcode ffb9c1d8 ffbac2d9
Nov 29 11:21:47 torsten-LIFEBOOK-E8410 kernel: [ 66.304483] nouveau E[ PGRAPH][0000:01:00.0] TRAP
Nov 29 11:21:47 torsten-LIFEBOOK-E8410 kernel: [ 66.304487] nouveau E[ PGRAPH][0000:01:00.0] ch 2 [0x0007b23000] subc 7 class 0x8297 mthd 0x15e0 data 0x00000000

and

Nov 29 11:26:04 torsten-LIFEBOOK-E8410 kernel: [ 323.106306] nouveau E[ DRM] GPU lockup - switching to software fbcon
Nov 29 11:27:07 torsten-LIFEBOOK-E8410 kernel: [ 386.736037] nouveau E[ 3431] failed to idle channel 0xcccc0001
Nov 29 11:27:09 torsten-LIFEBOOK-E8410 kernel: [ 388.735098] nouveau E[ PFIFO][0000:01:00.0] channel 3 unload timeout
Nov 29 11:27:12 torsten-LIFEBOOK-E8410 kernel: [ 391.732025] nouveau E[ 3431] failed to idle channel 0xcccc0000
Nov 29 11:27:14 torsten-LIFEBOOK-E8410 kernel: [ 393.731221] nouveau E[ PFIFO][0000:01:00.0] channel 2 unload timeout
Nov 29 11:28:09 torsten-LIFEBOOK-E8410 kernel: [ 448.580025] nouveau E[ 4056] failed to idle channel 0xcccc0001
Nov 29 11:28:11 torsten-LIFEBOOK-E8410 kernel: [ 450.579162] nouveau E[ PFIFO][0000:01:00.0] channel 3 unload timeout
Nov 29 11:28:14 torsten-LIFEBOOK-E8410 kernel: [ 453.576022] nouveau E[ 4056] failed to idle channel 0xcccc0000
Nov 29 11:28:16 torsten-LIFEBOOK-E8410 kernel: [ 455.575198] nouveau E[ PFIFO][0000:01:00.0] channel 2 unload timeout
Nov 29 11:29:17 torsten-LIFEBOOK-E8410 kernel: [ 516.552036] nouveau E[ 4211] failed to idle channel 0xcccc0001
Nov 29 11:29:19 torsten-LIFEBOOK-E8410 kernel: [ 518.553893] nouveau E[ PFIFO][0000:01:00.0] channel 3 unload timeout
Nov 29 11:29:22 torsten-LIFEBOOK-E8410 kernel: [ 521.556024] nouveau E[ 4211] failed to idle channel 0xcccc0000
Nov 29 11:29:24 torsten-LIFEBOOK-E8410 kernel: [ 523.555077] nouveau E[ PFIFO][0000:01:00.0] channel 2 unload timeout

For both the session is Gnome. Now when running on Gnome (no effects ) ist is slighly more stable.

As mentioned I also tried NVIDIA drivers .... with the effect that the system was unusable at all.

Since the issue seems to be quite old . . . there should be an appropriate solution by now !

cheers
TS