kernel-packages team mailing list archive

[Kyle Auble <kyle.auble@xxxxxxxx>]

So I've been busy, but I have some more useful info. I've confirmed the
bug's still in both version 3.5.0-40 (32 bit) and 3.2.0-53 (64 bit) of
the Ubuntu kernel.

However, while I've been busy, I had the idea of just splicing the
changes from Xiao's patch (which we found in the last bisect) into the
mainline kernel before doing a reverse bisect on commits before that
one. After a couple of false starts, I was able to isolate a prior patch
clearly (I tested it 10 times in various boot-up situations, and it
always worked). Apparently the magic patch was a merge by Linus:

99c6bcf46d2233d33e441834e958ed0bc22b190a by Linus Torvalds

I honestly have no clue why this patch would be the earlier necessary
one, and my gut feeling is that it means this bug is very tangled and
subtle. I'm both busy and a little out of my league to contact the
kernel mailing-list directly, but while running the bisection, I came
across the name Rafael J. Wysocki a couple of times. My 2nd reverse
bisection actually uses a patch by him as the earliest commit because I
originally zeroed in on his commit as the next critical one. It was only
after testing over 6 or 7 boots that I confirmed a bad session.

Anyways, when searching for his commits in the git log, a recent one
(60f75b8e97daf4a39790a20d962cb861b9220af5) jumped out since it sounded
particularly relevant. It specifically handles interaction problems
between PCI bridges and ACPI, then mentions graphics adapter detection
as a major justification. I'm guessing you may already be in touch with
him, but if not, it sounds like he might be a good person to talk to.

** Attachment added: "2nd (Reverse) Bisection Log"
   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1009312/+attachment/3828444/+files/bisect2-log

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https://bugs.launchpad.net/bugs/1009312

Title:
  GPU loads unreliably, possible kernel timeout

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Reverse upstream kernel commit bisecting revealed a fix via commit
  d34883d4e35c0a994e91dd847a82b4c9e0c31d83 by Xiao Guangrong.

  WORKAROUND: If I boot my computer from battery power alone without AC,
  my GPU & the Ubuntu splash screen load on startup.

  I've been running Ubuntu 12.04 for a few weeks now, I really like it,
  but from the beginning, I had the issue where the proprietary nvidia
  driver installs but fails to load (confirmed from the commandline,
  jockey, and the nvidia-dashboard). Over time, I've noticed that
  sometimes when I power on, the driver does load and I can enter a full
  unity session without problems, but other times, I fall back onto the
  VESA driver and a unity 2d session. On a whim, I finally copied logs
  from both successful and unsuccessful boots, cut out the times, ran a
  diff on them, and noticed a pattern in the kernel messages.

  I'm filing this bug after a successful boot so I've also attached
  copies of dmesg, Xorg, & jockey logs from an unsuccessful boot. The
  first thing I saw in the logs was a timing discrepancy between the two
  boots, most of which is due to GPE storms. I've checked other logs and
  there's not a clear relation, I've had successful boots with them and
  unsuccessful ones without them. I do still wonder if they may be
  involved because it seems I'm a little luckier if I turn off and
  unplug any peripherals before booting.

  But around line 325 in my dmesg logs, at the last step that mentions
  my GPU (pci device 0000:01:00.0), there is consistently at most a 6 ms
  delay for successful boots, but a 30 ms one for unsuccessful ones.
  Also, on all dmesg logs from successful boots, around line 610, the
  message "Boot video device" is recorded for the PCI number of my GPU,
  but for every fallback, the message never appears. That's why I'm
  thinking it's a kernel issue because the earliest mention of a
  specific driver module doesn't occur until later in the log.

  I'm currently using fully updated versions of nvidia driver 295.49.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-24-generic-pae 3.2.0-24.39
  ProcVersionSignature: Ubuntu 3.2.0-24.39-generic-pae 3.2.16
  Uname: Linux 3.2.0-24-generic-pae i686
  NonfreeKernelModules: nvidia
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 2.0.1-0ubuntu8
  Architecture: i386
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  kyle       1790 F.... pulseaudio
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xfc400000 irq 48'
     Mixer name	: 'SigmaTel STAC9872AK'
     Components	: 'HDA:83847662,104d1c00,00100201 HDA:14f12c06,104d1700,00100000'
     Controls      : 18
     Simple ctrls  : 9
  Date: Tue Jun  5 22:44:22 2012
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=1b676222-44c7-453c-a522-06b6fd5d66f4
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
  MachineType: Sony Corporation VGN-FZ260E
  PccardctlIdent:
   Socket 0:
     no product info available
  PccardctlStatus:
   Socket 0:
     no card
  ProcEnviron:
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.2.0-24-generic-pae root=UUID=e330e46a-b426-439f-8037-c1069cc693ce ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-24-generic-pae N/A
   linux-backports-modules-3.2.0-24-generic-pae  N/A
   linux-firmware                                1.79
  RfKill:
   0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/04/2007
  dmi.bios.vendor: Phoenix Technologies LTD
  dmi.bios.version: R1120J7
  dmi.board.asset.tag: N/A
  dmi.board.name: VAIO
  dmi.board.vendor: Sony Corporation
  dmi.board.version: N/A
  dmi.chassis.asset.tag: N/A
  dmi.chassis.type: 10
  dmi.chassis.vendor: Sony Corporation
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrR1120J7:bd07/04/2007:svnSonyCorporation:pnVGN-FZ260E:pvrFC000001:rvnSonyCorporation:rnVAIO:rvrN/A:cvnSonyCorporation:ct10:cvrN/A:
  dmi.product.name: VGN-FZ260E
  dmi.product.version: FC000001
  dmi.sys.vendor: Sony Corporation
  ---
  AcpiTables: Error: command ['pkexec', '/usr/share/apport/dump_acpi_tables.py'] failed with exit code 127: Error executing /usr/share/apport/dump_acpi_tables.py: Permission denied
  ApportVersion: 2.5.1-0ubuntu4
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ubuntu     3344 F.... pulseaudio
  CasperVersion: 1.321
  DistroRelease: Ubuntu 12.10
  LiveMediaBuild: Ubuntu 12.10 "Quantal Quetzal" - Alpha i386 (20120831)
  MachineType: Sony Corporation VGN-FZ260E
  Package: linux (not installed)
  PccardctlIdent:
   Socket 0:
     no product info available
  PccardctlStatus:
   Socket 0:
     no card
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB:

  ProcKernelCmdLine: noprompt cdrom-detect/try-usb=true file=/cdrom/preseed/username.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
  ProcVersionSignature: Ubuntu 3.5.0-13.14-generic 3.5.3
  RelatedPackageVersions:
   linux-restricted-modules-3.5.0-13-generic N/A
   linux-backports-modules-3.5.0-13-generic  N/A
   linux-firmware                            1.91
  RfKill:
   0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: yes
  Tags:  quantal running-unity
  Uname: Linux 3.5.0-13-generic i686
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  dmi.bios.date: 07/04/2007
  dmi.bios.vendor: Phoenix Technologies LTD
  dmi.bios.version: R1120J7
  dmi.board.asset.tag: N/A
  dmi.board.name: VAIO
  dmi.board.vendor: Sony Corporation
  dmi.board.version: N/A
  dmi.chassis.asset.tag: N/A
  dmi.chassis.type: 10
  dmi.chassis.vendor: Sony Corporation
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrR1120J7:bd07/04/2007:svnSonyCorporation:pnVGN-FZ260E:pvrFC000001:rvnSonyCorporation:rnVAIO:rvrN/A:cvnSonyCorporation:ct10:cvrN/A:
  dmi.product.name: VGN-FZ260E
  dmi.product.version: FC000001
  dmi.sys.vendor: Sony Corporation
  ---
  ApportVersion: 2.10.2-0ubuntu1
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ubuntu     4176 F.... pulseaudio
                        ubuntu     6045 F.... pulseaudio
  CasperVersion: 1.333
  DistroRelease: Ubuntu 13.10
  LiveMediaBuild: Ubuntu 13.10 "Saucy Salamander" - Alpha i386 (20130529)
  MachineType: Sony Corporation VGN-FZ260E
  MarkForUpload: True
  Package: linux (not installed)
  PccardctlIdent:
   Socket 0:
     no product info available
  PccardctlStatus:
   Socket 0:
     no card
  ProcEnviron:
   LANGUAGE=en_US
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB:

  ProcKernelCmdLine: noprompt cdrom-detect/try-usb=true persistent file=/cdrom/preseed/hostname.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
  ProcVersionSignature: Ubuntu 3.9.0-3.8-generic 3.9.4
  PulseList:
   Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
   No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-3.9.0-3-generic N/A
   linux-backports-modules-3.9.0-3-generic  N/A
   linux-firmware                           1.109
  RfKill:
   0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
  Tags:  saucy
  Uname: Linux 3.9.0-3-generic i686
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

  dmi.bios.date: 07/04/2007
  dmi.bios.vendor: Phoenix Technologies LTD
  dmi.bios.version: R1120J7
  dmi.board.asset.tag: N/A
  dmi.board.name: VAIO
  dmi.board.vendor: Sony Corporation
  dmi.board.version: N/A
  dmi.chassis.asset.tag: N/A
  dmi.chassis.type: 10
  dmi.chassis.vendor: Sony Corporation
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrR1120J7:bd07/04/2007:svnSonyCorporation:pnVGN-FZ260E:pvrFC000001:rvnSonyCorporation:rnVAIO:rvrN/A:cvnSonyCorporation:ct10:cvrN/A:
  dmi.product.name: VGN-FZ260E
  dmi.product.version: FC000001
  dmi.sys.vendor: Sony Corporation

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