I see this error also repeatedly since upgrading from 13.10 to 14.04. The system is unusable since then. I tried to use different version of the nvidia proprietary drivers but not of them did run stable either. Currently I use updated drivers from oibaf ppa.
Kernel: 3.13.0-24-generic #47-Ubuntu SMP Fri May 2 23:30:00 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux Graphics Device: VGA compatible controller: NVIDIA Corporation C79 [GeForce 9400] (rev b1) xserver-xorg-video-nouveau 1:1.0.10+git1405091930.8604a7~gd~t libdrm-nouveau2:amd64 2.4.54+git1405131830.305478~gd~t libdrm2:amd64 2.4.54+git1405131830.305478~gd~t [ 4657.804009] nouveau E[Xorg[1120]] failed to idle channel 0xcccc0001 [Xorg[1120]] [ 4657.804035] nouveau E[ PFB][0000:02:00.0] trapped write at 0x010028e3a8 on channel 0x0001fee0 [unknown] BAR/PFIFO_WRITE/IN reason: PAGE_NOT_PRESENT [ 4672.804008] nouveau E[Xorg[1120]] failed to idle channel 0xcccc0001 [Xorg[1120]] [ 4672.804036] nouveau E[ PFB][0000:02:00.0] trapped write at 0x010028e398 on channel 0x0001fee0 [unknown] BAR/PFIFO_WRITE/IN reason: PAGE_NOT_PRESENT [ 4672.804063] nouveau E[ PFB][0000:02:00.0] trapped write at 0x010028e3a0 on channel 0x0001fee0 [unknown] BAR/PFIFO_WRITE/IN reason: PAGE_NOT_PRESENT [ 4672.804078] nouveau E[ PFB][0000:02:00.0] trapped write at 0x010028e390 on channel 0x0001fee0 [unknown] BAR/PFIFO_WRITE/IN reason: PAGE_NOT_PRESENT [ 4672.804093] nouveau E[ PFB][0000:02:00.0] trapped write at 0x010028e388 on channel 0x0001fee0 [unknown] BAR/PFIFO_WRITE/IN reason: PAGE_NOT_PRESENT [ 4672.804126] nouveau E[ PFB][0000:02:00.0] trapped write at 0x01003f9020 on channel 0x0001fee0 [unknown] BAR/PFIFO_WRITE/IN reason: PAGE_NOT_PRESENT [ 4672.804151] nouveau E[ PFB][0000:02:00.0] trapped write at 0x0100000000 on channel 0x0001fee0 [unknown] BAR/PFIFO_WRITE/IN reason: PAGE_NOT_PRESENT [ 4676.506881] nouveau W[ PFIFO][0000:02:00.0] unknown intr 0x06080000, ch 127 above line is repeated about 100 times, then: May 16 22:12:33 comet kernel: [ 4676.507823] nouveau E[ PFIFO][0000:02:00.0] still angry after 101 spins, halt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1097178 Title: nouveau failed to idle channel 0xcccc0000 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-quantal/+bug/1097178/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
