Public bug reported:
Backlight control does not work and there are no entries in
/sys/class/backlight.
No change using kernel parameter acpi_backlight=vendor.
ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: linux-image-3.8.0-16-generic 3.8.0-16.26
ProcVersionSignature: Ubuntu 3.8.0-16.26-generic 3.8.5
Uname: Linux 3.8.0-16-generic x86_64
ApportVersion: 2.9.2-0ubuntu5
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: dominic 1736 F.... pulseaudio
/dev/snd/controlC0: dominic 1736 F.... pulseaudio
Date: Sat Apr 6 12:00:50 2013
HibernationDevice: RESUME=UUID=ff7ba7bc-5134-4ddf-b94f-1eac1bd18114
InstallationDate: Installed on 2013-02-03 (61 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20130201.1)
MachineType: Hewlett-Packard HP Z1 Workstation
MarkForUpload: True
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=de_DE.UTF-8
SHELL=/bin/bash
ProcFB: 0 nouveaufb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-16-generic
root=UUID=b50a7fc4-4835-489c-b0e0-1b8ca32fdf8f ro quiet splash
ideo.use_bios_initial_backlight=0 vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.8.0-16-generic N/A
linux-backports-modules-3.8.0-16-generic N/A
linux-firmware 1.104
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/15/2012
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: J52 v01.03
dmi.board.asset.tag: CZC2220YXN
dmi.board.name: 3561h
dmi.board.vendor: Hewlett-Packard
dmi.chassis.asset.tag: CZC2220YXN
dmi.chassis.type: 13
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias:
dmi:bvnHewlett-Packard:bvrJ52v01.03:bd03/15/2012:svnHewlett-Packard:pnHPZ1Workstation:pvr:rvnHewlett-Packard:rn3561h:rvr:cvnHewlett-Packard:ct13:cvr:
dmi.product.name: HP Z1 Workstation
dmi.sys.vendor: Hewlett-Packard
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug raring
** Attachment added: "acpi"
https://bugs.launchpad.net/bugs/1165348/+attachment/3625447/+files/acpi
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https://bugs.launchpad.net/bugs/1165348
Title:
Backlight control does not work and there are no entries in
/sys/class/backlight.
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