kernel-packages team mailing list archive

[Jikos <1339939@xxxxxxxxxxxxxxxxxx>]

(In reply to comment #92)
> Created attachment 104227 [details] [review]
> head start before enabling
> 
> Another crazy idea. Looking at logs and Jiri's patch, the critical step
> seems to be when we set the valid bit. Let's see what happens if we give the
> ring a headstart, hopefully catching the moving ring.
> 
> You can experiment with different values, as long as they're a multiple of
> 8. 64 might be magic since it's the cacheline size (which in a few w/a is
> really important for register writes, even though that's strange).

This patch causes another ring initialization failure, 100%, during boot
(i.e. even no suspend-resume cycle necessary)

[    3.496122] [drm:init_ring_common] *ERROR* bsd ring initialization failed ctl 0001f001 (valid? 1) head 00000008 tail 00000040 start 00107000 [expected 00107000]
[    3.496256] [drm:i915_gem_init] *ERROR* Failed to initialize GPU, declaring it wedged

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https://bugs.launchpad.net/bugs/1339939

Title:
  [Lenovo ThinkPad T400] intel graphics fail after suspend with 3.16
  kernel

Status in The Linux Kernel:
  Incomplete
Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  After resuming from suspend, I find gnome-shell has crashed. If I try
  to restart gnome-shell or gdm after this all I get is the following
  message. Everything does work fine on initial boot up until I suspend.

  intel_do_flush_locked failed: Invalid argument

  Booting on the 3.13 kernel from trusty, this problem does not occur.

  I also tried to test utopic dailly Ubuntu GNOME, this fails to even
  boot too gdm, unless I set nomodeset from the kernel line. I have
  never need to do this in the past though.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: linux-image-3.15.0-6-generic 3.15.0-6.11
  ProcVersionSignature: Ubuntu 3.15.0-6.11-generic 3.15.0
  Uname: Linux 3.15.0-6-generic x86_64
  ApportVersion: 2.14.4-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  darkness   2770 F.... pulseaudio
  CurrentDesktop: GNOME
  Date: Thu Jul 10 10:04:38 2014
  HibernationDevice: RESUME=UUID=80ccdbf4-2eec-47cd-aac0-5d90ab898481
  MachineType: LENOVO 2764CTO
  PccardctlIdent:
   Socket 0:
     no product info available
  PccardctlStatus:
   Socket 0:
     no card
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.15.0-6-generic root=UUID=70836e80-816b-424b-8aaf-6a0d2863fa50 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.15.0-6-generic N/A
   linux-backports-modules-3.15.0-6-generic  N/A
   linux-firmware                            1.132
  SourcePackage: linux
  UpgradeStatus: Upgraded to utopic on 2014-01-05 (185 days ago)
  dmi.bios.date: 02/13/2009
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 7UET61WW (2.07 )
  dmi.board.name: 2764CTO
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvr7UET61WW(2.07):bd02/13/2009:svnLENOVO:pn2764CTO:pvrThinkPadT400:rvnLENOVO:rn2764CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 2764CTO
  dmi.product.version: ThinkPad T400
  dmi.sys.vendor: LENOVO

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