kernel-packages team mailing list archive

["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

LJ, could you please boot into a Ubuntu repository kernel and execute the following command, as it will automatically gather debugging information, in a terminal:
apport-collect 1177963
When reporting bugs in the future please use apport by using 'ubuntu-bug' and the name of the package affected. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs.

** Tags removed: kernel-bug-exists-upstream
** Tags added: kernel-bug-exists-upstream-v3.9 needs-kernel-logs needs-upstream-testing

** Description changed:

- Hello
- 
- I have a Dell XPS12 and the problem that the backlight gets turned off on the Ubuntu 13.04 boot-screen.
- The system starts up normally, at the grub menu the brightness is normal and as soon as the Ubuntu boot-screen appears the brightness is set to minimal level (what unfortunately means completely turned off).
- The hot-keys work, so that I can immediately adjust the brightness and log in to the system - but it is very annoying.
- I tested 3.8.18, 3.8.19, 3.8.20 as well as mainline 3.9.0 and 3.9.1 kernel but the bug persists. Or could it be a bug in the grub config?
- 
- Please let me know what log or config files may be helpful.
- 
- Thanks in advance
- 
- grub file:
- # If you change this file, run 'update-grub' afterwards to update
- # /boot/grub/grub.cfg.
- # For full documentation of the options in this file, see:
- #   info -f grub -n 'Simple configuration'
- 
- GRUB_DEFAULT=0
- GRUB_HIDDEN_TIMEOUT=0
- GRUB_HIDDEN_TIMEOUT_QUIET=true
- GRUB_TIMEOUT=10
- GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
- GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
- GRUB_CMDLINE_LINUX=""
- --- 
- ApportVersion: 2.9.2-0ubuntu8
- Architecture: amd64
- DistroRelease: Ubuntu 13.04
- EcryptfsInUse: Yes
- InstallationDate: Installed on 2013-04-26 (12 days ago)
- InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
- MarkForUpload: True
- Package: linux (not installed)
- Tags:  raring
- Uname: Linux 3.9.1-030901-generic x86_64
- UnreportableReason: The running kernel is not an Ubuntu kernel
- UpgradeStatus: No upgrade log present (probably fresh install)
- UserGroups: adm cdrom dialout dip lpadmin netdev plugdev sambashare scanner sudo vboxusers
+ I have a Dell XPS12 and the problem that the backlight gets turned off
+ on the Ubuntu 13.04 boot-screen. The system starts up normally, at the
+ grub menu the brightness is normal and as soon as the Ubuntu boot-screen
+ appears the brightness is set to minimal level (what unfortunately means
+ completely turned off). The hot-keys work, so that I can immediately
+ adjust the brightness and log in to the system. I tested 3.8.18, 3.8.19,
+ 3.8.20 as well as mainline 3.9.0 and 3.9.1 kernel but the bug persists.

** Changed in: linux (Ubuntu)
       Status: Confirmed => Incomplete

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https://bugs.launchpad.net/bugs/1177963

Title:
  Backlight switches of on Ubuntu 13.04 boot-screen - Dell XPS12

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  I have a Dell XPS12 and the problem that the backlight gets turned off
  on the Ubuntu 13.04 boot-screen. The system starts up normally, at the
  grub menu the brightness is normal and as soon as the Ubuntu boot-
  screen appears the brightness is set to minimal level (what
  unfortunately means completely turned off). The hot-keys work, so that
  I can immediately adjust the brightness and log in to the system. I
  tested 3.8.18, 3.8.19, 3.8.20 as well as mainline 3.9.0 and 3.9.1
  kernel but the bug persists.

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