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[muka <luca.capra@xxxxxxxxx>]

Dear
the panic seems gone with 4.1 rc8 when coming back from black screen. The dmesg is not reporting any nouveau error anymore

The suspend/hibernation freeze issues persist but probably this is
another issues (?)


Thanks Luca

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https://bugs.launchpad.net/bugs/1465364

Title:
  Laptop freeze with panic error

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  When getting back to the pc and the screen is turned off, the pc
  freeze and sometime show a message like (sorry do not have full
  message)

  drm_kms_helper: panic ...

  In dmesg I see a lot of noveau related error like

  
  [  +0,001098] nouveau E[   PFIFO][0000:01:00.0] SCHED_ERROR [ UNK08 ]  # thousand like this!
  [  +0,001099] nouveau E[   PFIFO][0000:01:00.0] SCHED_ERROR [ UNK08 ]
  [  +0,001098] nouveau E[   PFIFO][0000:01:00.0] SCHED_ERROR [ UNK08 ]
  [  +0,001099] nouveau E[   PFIFO][0000:01:00.0] SCHED_ERROR [ UNK08 ]
  [  +0,001097] nouveau E[   PFIFO][0000:01:00.0] SCHED_ERROR [ UNK08 ]
  [  +0,001096] nouveau E[   PFIFO][0000:01:00.0] SCHED_ERROR [ UNK08 ]
  [  +0,000566] nouveau E[   PFIFO][0000:01:00.0] runlist 4 update timeout
  [  +0,000123] [drm] Initialized nouveau 1.2.1 20120801 for 0000:01:00.0 on minor 1
  [  +1,260477] nouveau  [  PGRAPH][0000:01:00.0] using external firmware
  [  +0,000022] nouveau 0000:01:00.0: Direct firmware load for nouveau/nv117_fuc409c failed with error -2
  [  +0,000006] nouveau 0000:01:00.0: Direct firmware load for nouveau/fuc409c failed with error -2
  [  +0,000001] nouveau E[  PGRAPH][0000:01:00.0] failed to load fuc409c
  [giu15 20:06] nouveau E[   PIBUS][0000:01:00.0] HUB0: 0x6013d4 0xffff573f (0x1c408200)
  [giu15 20:09] nouveau E[   PIBUS][0000:01:00.0] HUB0: 0x6013d4 0xffffffff (0x1b40822c)

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.19.0-20-generic 3.19.0-20.20
  ProcVersionSignature: Ubuntu 3.19.0-20.20-generic 3.19.8
  Uname: Linux 3.19.0-20-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  l          1422 F.... pulseaudio
   /dev/snd/controlC0:  l          1422 F.... pulseaudio
  CurrentDesktop: LXDE
  Date: Mon Jun 15 20:09:15 2015
  HibernationDevice: RESUME=UUID=5bb9993a-20aa-42b9-b775-d2508ba91475
  InstallationDate: Installed on 2015-04-16 (59 days ago)
  InstallationMedia: Lubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
  MachineType: LENOVO 20378
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-20-generic root=UUID=949b66c8-bdcd-4186-980e-b873d5da5906 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-20-generic N/A
   linux-backports-modules-3.19.0-20-generic  N/A
   linux-firmware                             1.143.1
  SourcePackage: linux
  UpgradeStatus: Upgraded to vivid on 2015-05-24 (22 days ago)
  dmi.bios.date: 08/18/2014
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 9ECN31WW(V1.14)
  dmi.board.asset.tag: 00000000NO DPK
  dmi.board.name: Lenovo Y50-70
  dmi.board.vendor: LENOVO
  dmi.board.version: 00000000NO DPK
  dmi.chassis.asset.tag: 00000000NO DPK
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Lenovo Y50-70
  dmi.modalias: dmi:bvnLENOVO:bvr9ECN31WW(V1.14):bd08/18/2014:svnLENOVO:pn20378:pvrLenovoY50-70:rvnLENOVO:rnLenovoY50-70:rvr00000000NODPK:cvnLENOVO:ct10:cvrLenovoY50-70:
  dmi.product.name: 20378
  dmi.product.version: Lenovo Y50-70
  dmi.sys.vendor: LENOVO

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