On an HP Folio 13, the monitor's backlight does not work by default. It is necessary to add a kernel parameter through grub's config to make it work:
acpi_backlight=vendor
(see http://labo.eliaz.fr/spip.php?article94)
ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: linux-image-3.5.0-17-generic 3.5.0-17.28
ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5
Uname: Linux 3.5.0-17-generic x86_64
ApportVersion: 2.6.1-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: gpothier 1892 F.... pulseaudio
Date: Sat Oct 13 00:25:35 2012
HibernationDevice: RESUME=UUID=281e4254-f100-4193-8e7d-13c4d9785734
MachineType: Hewlett-Packard HP Folio 13 Notebook PCC
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB:
0 EFI VGA
1 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-17-generic root=UUID=acdbf868-560a-4ec7-8772-45c16c166819 ro acpi_backlight=vendor quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.5.0-17-generic N/A
linux-backports-modules-3.5.0-17-generic N/A
linux-firmware 1.95
SourcePackage: linux
StagingDrivers: rts_pstor
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/05/2012
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.06
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 17F8
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 46.34
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnHewlett-Packard:bvrF.06:bd03/05/2012:svnHewlett-Packard:pnHPFolio13NotebookPCC:pvr068C100000204A00000320100:rvnHewlett-Packard:rn17F8:rvr46.34:cvnHewlett-Packard:ct10:cvrChassisVersion:
dmi.product.name: HP Folio 13 Notebook PCC
dmi.product.version: 068C100000204A00000320100
dmi.sys.vendor: Hewlett-Packard
On an HP Folio 13, the monitor's backlight does not work by default. It is necessary to add a kernel parameter through grub's config to make it work: vendor labo.eliaz. fr/spip. php?article94)
acpi_backlight=
(see http://
ProblemType: Bug 3.5.0-17- generic 3.5.0-17.28 ature: Ubuntu 3.5.0-17.28-generic 3.5.5 controlC0: gpothier 1892 F.... pulseaudio UUID=281e4254- f100-4193- 8e7d-13c4d97857 34 DIR=<set> /boot/vmlinuz- 3.5.0-17- generic root=UUID= acdbf868- 560a-4ec7- 8772-45c16c1668 19 ro acpi_backlight= vendor quiet splash vt.handoff=7 ersions: restricted- modules- 3.5.0-17- generic N/A backports- modules- 3.5.0-17- generic N/A asset.tag: Base Board Asset Tag asset.tag: Chassis Asset Tag version: Chassis Version Packard: bvrF.06: bd03/05/ 2012:svnHewlett -Packard: pnHPFolio13Note bookPCC: pvr068C10000020 4A00000320100: rvnHewlett- Packard: rn17F8: rvr46.34: cvnHewlett- Packard: ct10:cvrChassis Version: version: 068C100000204A0 0000320100
DistroRelease: Ubuntu 12.10
Package: linux-image-
ProcVersionSign
Uname: Linux 3.5.0-17-generic x86_64
ApportVersion: 2.6.1-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/
Date: Sat Oct 13 00:25:35 2012
HibernationDevice: RESUME=
MachineType: Hewlett-Packard HP Folio 13 Notebook PCC
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
XDG_RUNTIME_
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB:
0 EFI VGA
1 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=
RelatedPackageV
linux-
linux-
linux-firmware 1.95
SourcePackage: linux
StagingDrivers: rts_pstor
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/05/2012
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.06
dmi.board.
dmi.board.name: 17F8
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 46.34
dmi.chassis.
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.
dmi.modalias: dmi:bvnHewlett-
dmi.product.name: HP Folio 13 Notebook PCC
dmi.product.
dmi.sys.vendor: Hewlett-Packard