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[Yuri Ribeiro Sucupira <yuri_sucupira@xxxxxxxxxxx>]

Hello.

Happy New Year everyone.   :)

I have a doubt: I started testing these kernels and one of'em has the
following message in dmesg (shell command was 'dmesg | grep -i i915'):

[   11.547334] snd_hda_intel 0000:00:03.0: bound 0000:00:02.0 (ops
i915_audio_component_bind_ops [i915])

I understand that this isn't a bug (it seems that snd_hda_intel was
bound to the audio component of i915 and that's it), but since I'm not
100% sure about what this message actually means it doesn't hurt to ask.
Any consideration to be taken into account here?

Anyway, so far I've tested the following kernels and got the following
outputs from 'dmesg |grep -i i915':

1) v4.1.6-unstable:

[    1.195451] [drm] Initialized i915 1.6.0 20150327 for 0000:00:02.0 on minor 0
[    2.311613] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
[    2.311614] i915 0000:00:02.0: registered panic notifier
[    8.605191] snd_hda_intel 0000:00:03.0: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915])

Because I am assuming that "snd_hda_intel 0000:00:03.0: bound
0000:00:02.0 (ops i915_audio_component_bind_ops [i915])" isn't a bug, I
considered that the bug reported in this ticket is fixed in kernel
version "v4.1.6-unstable", hence I decided to test a previous (older)
kernel version: v4.0.6-wily.

2) v4.0.6-wily:

[    1.243539] [drm] Initialized i915 1.6.0 20150130 for 0000:00:02.0 on minor 0
[    2.316114] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
[    2.316115] i915 0000:00:02.0: registered panic notifier
[    7.558016] snd_hda_intel 0000:00:03.0: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915])
[   34.302400] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun

I considered that FIFO underrun a bug, hence I then decided to test a
newer kernel version: v4.1-rc7-unstable.

3) v4.1-rc7-unstable:

[    1.194191] [drm] Initialized i915 1.6.0 20150327 for 0000:00:02.0 on minor 0
[    2.324857] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
[    2.324858] i915 0000:00:02.0: registered panic notifier
[    5.989937] snd_hda_intel 0000:00:03.0: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915])
[   26.618897] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun

Same FIFO underrun issue, thus I then tested a newer kernel version:
v4.1.2-unstable.

4) v4.1.2-unstable:

[    1.188288] [drm] Initialized i915 1.6.0 20150327 for 0000:00:02.0 on minor 0
[    2.296468] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
[    2.296469] i915 0000:00:02.0: registered panic notifier
[    7.502745] snd_hda_intel 0000:00:03.0: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915])

Assuming that "snd_hda_intel 0000:00:03.0: bound 0000:00:02.0 (ops
i915_audio_component_bind_ops [i915])" isn't a bug, I considered the bug
fixed in kernel version v4.1.2-unstable, and thus decided to test a
previous (older) kernel version: v4.1-wily.

5) v4.1-wily:

[    1.176185] [drm] Initialized i915 1.6.0 20150327 for 0000:00:02.0 on minor 0
[    2.292596] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
[    2.292597] i915 0000:00:02.0: registered panic notifier
[   11.547334] snd_hda_intel 0000:00:03.0: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915])

Again, since I'm assuming that "snd_hda_intel 0000:00:03.0: bound
0000:00:02.0 (ops i915_audio_component_bind_ops [i915])" isn't a bug,
I'm considering that the vug is fixed in kernel version v4.1-wily.

Is it ok so far? If it is, I am very close to finding out in which
kernel version the bug fix was commited.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1520040

Title:
  [drm:gen8_irq_handler [i915_bpo]] *ERROR* The master control interrupt
  lied (SDE)!

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Device: notebook Dell Inspiron 5548

  Operating system: 64-bit XUbuntu Linux 14.04 LTS

  Processor: Intel Core i7-5500U

  Kernel: 3.19.0-33-generic #38~14.04.1-Ubuntu SMP x86_64

  Video: dual chip. These are the two display controllers:
  - Advanced Micro Devices, Inc. [AMD/ATI] Topaz XT [Radeon R7 M260] display controller 33000000Hz (requires kernel module / device driver "fglrx"); and
  - Intel Corporation Broadwell-U Integrated Graphics VGA compatible controller 33000000Hz (requires kernel module / device driver "i915").

  Problem: my notebook's operating system is switching to runlevel 0
  (power off) randomly, subtly and thus unexpectedly. And if I 'cat
  /var/log/kern.log |grep -i i915' I get a lot of "[drm:gen8_irq_handler
  [i915_bpo]] *ERROR* The master control interrupt lied (SDE)!"
  messages. I'm under the impression that either the kernel or the
  kernel module "i915_bpo" is buggy.

  My notebook's problem can't be related to overheating, because it's a
  brand-new notebook (less than 1 month old) and I've already monitored
  its temperature parameters: nothing abnormal is happening. Also, I'm
  using a cooling laptop base/pad.

  Other kernels I've tested, with which the same issue happens:
  - 3.19.0-18-generic (kernel module: i915_bpo)
  - 3.19.0-23-generic (kernel module: i915_bpo)
  - 3.19.0-28-generic (kernel module: i915_bpo)
  - 4.2.0-18-generic (kernel module: i915)

  Temporary workaround: I downgraded to kernel "3.13.0-36-generic",
  which isn't buggy with its "i915_bdw.ko" (version 3.0) kernel object
  (module). Full path for this module:
  /lib/modules/3.13.0-36-generic/kernel/ubuntu/i915/i915_bdw.ko

  Notes:
  - "bdw" stands for "Broadwell"
  - "bpo", I believe, stands for "backport"

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.19.0-33-generic 3.19.0-33.38~14.04.1
  ProcVersionSignature: Ubuntu 3.19.0-33.38~14.04.1-generic 3.19.8-ckt7
  Uname: Linux 3.19.0-33-generic x86_64
  NonfreeKernelModules: wl fglrx
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
  CurrentDesktop: XFCE
  Date: Wed Nov 25 23:44:39 2015
  InstallationDate: Installed on 2015-11-03 (22 days ago)
  InstallationMedia: Xubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
  SourcePackage: linux-lts-vivid
  UpgradeStatus: No upgrade log present (probably fresh install)
  --- 
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  yuriyrs    2832 F.... pulseaudio
   /dev/snd/controlC1:  yuriyrs    2832 F.... pulseaudio
  CurrentDesktop: XFCE
  DistroRelease: Ubuntu 14.04
  HibernationDevice: RESUME=UUID=a08f36f9-0611-4894-9da9-8b1dcc960a86
  InstallationDate: Installed on 2015-11-03 (24 days ago)
  InstallationMedia: Xubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
  MachineType: Dell Inc. Inspiron 5548
  NonfreeKernelModules: fglrx wl
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-33-generic.efi.signed root=UUID=4f05c2b3-c971-4bf8-bcb6-a76d60b68e45 ro quiet splash video.use_native_backlight=1 intremap=no_x2apic_optout vt.handoff=7
  ProcVersionSignature: Ubuntu 3.19.0-33.38~14.04.1-generic 3.19.8-ckt7
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-33-generic N/A
   linux-backports-modules-3.19.0-33-generic  N/A
   linux-firmware                             1.127.18
  Tags:  trusty
  Uname: Linux 3.19.0-33-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm audio cdrom dialout dip fax floppy fuse lpadmin netdev plugdev sambashare scanner sudo tape video
  _MarkForUpload: True
  dmi.bios.date: 10/12/2015
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A06
  dmi.board.name: 0YDTG3
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A02
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: A06
  dmi.modalias: dmi:bvnDellInc.:bvrA06:bd10/12/2015:svnDellInc.:pnInspiron5548:pvrA06:rvnDellInc.:rn0YDTG3:rvrA02:cvnDellInc.:ct8:cvrA06:
  dmi.product.name: Inspiron 5548
  dmi.product.version: A06
  dmi.sys.vendor: Dell Inc.

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