kernel-packages team mailing list archive

[sys64738 <burkhard.meier@xxxxxx>]

The problem still exists with kernel 3.17.3 and seems to be fixed with
3.18-rc1 (where the system behaviour is the same as described further
above for 3.18-rc4).

I have read the wiki articles about bisecting with git (and found all of
this quite interesting) and also locally built one kernel version but
then decided not to walk through the whole procedure. This is just a
netbook which requires a lot of patience for running the builds, and I
currently don't have a more powerful Ubuntu machine available for
building the kernels.

Also, there is the workaround with writing brightness values to the
kernel's file system interface, so I can wait for 15.04.

However, if pre-built kernel packages for the intermediate builds betwen
3.17.3 and 3.18-rc1 were available anywhere, I would try them.

I would also be interested in learning about for what possible reasons
the /sys/class/backlight interface works and why the hotkeys don't.

Best Regards

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https://bugs.launchpad.net/bugs/1392024

Title:
  Backlight control not working Dell Insprion Mini 10

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Since my upgrade from Lubuntu 14.04 to 14.10, my backlight controls
  (hotkeys to increase/decrease brightness) no longer work on my Dell
  Inspiron Mini 10. With 14.04 and earlier versions there was no
  problem.

  There are entries under /sys/class/backlight. I have also tried
  booting with acpi_backlight=vendor. After rebooting with that option,
  there was a dell entry under /sys/class/backlight, but this didn't fix
  the problem.

  Trying to pass brightness values to the files under
  /sys/class/backlight didn't change brightness either (I believe I
  tried all of them).

  I'll try to add the attachments recommended by
  https://wiki.ubuntu.com/Kernel/Debugging/Backlight in a moment.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: linux-image-3.16.0-24-generic 3.16.0-24.32
  ProcVersionSignature: Ubuntu 3.16.0-24.32-generic 3.16.4
  Uname: Linux 3.16.0-24-generic i686
  ApportVersion: 2.14.7-0ubuntu8
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  rb706      1823 F.... lxpanel
  CRDA: Error: [Errno 2] Datei oder Verzeichnis nicht gefunden: 'iw'
  CurrentDesktop: LXDE
  Date: Wed Nov 12 20:22:11 2014
  HibernationDevice: RESUME=UUID=85e4a4ec-638f-4cac-820e-4f458beed81c
  InstallationDate: Installed on 2013-09-16 (422 days ago)
  InstallationMedia: Lubuntu 13.04 "Raring Ringtail" - Release i386 (20130423.1)
  MachineType: Dell Inc. Inspiron 1010
  ProcFB: 0 psbdrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-24-generic root=UUID=9116d68a-2def-4507-83f0-9e895e68e835 ro quiet splash vt.handoff=7
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-3.16.0-24-generic N/A
   linux-backports-modules-3.16.0-24-generic  N/A
   linux-firmware                             1.138
  SourcePackage: linux
  UpgradeStatus: Upgraded to utopic on 2014-11-10 (2 days ago)
  dmi.bios.date: 07/23/2009
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A07
  dmi.board.name: 0R990K
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A07
  dmi.chassis.asset.tag: **********
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: A07
  dmi.modalias: dmi:bvnDellInc.:bvrA07:bd07/23/2009:svnDellInc.:pnInspiron1010:pvrA07:rvnDellInc.:rn0R990K:rvrA07:cvnDellInc.:ct8:cvrA07:
  dmi.product.name: Inspiron 1010
  dmi.product.version: A07
  dmi.sys.vendor: Dell Inc.

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