Hi Christopher,
thanks for your continued help.
The command
"echo 8 > /sys/class/backlight/intel_backlight/brightness"
does set the brightness to a very low value (basically completely black). This
was done with the "acpi_backlight=vendor" kernel parameter in use.
Rebooting "with just kernel parameter
video.use_bios_initial_backlight=0" does not change anything (indicator
bubble pops up, backlight level doesn't actually change).
Rebooting "with just kernel parameter video.use_native_backlight=1"
does not change anything (indicator bubble pops up, backlight level
doesn't actually change).
This did work: "Creating a new file in
/usr/share/X11/xorg.conf.d/80-backlight.conf and pasting into it the following
code:
Section "Device"
Identifier "Intel Graphics"
Driver "intel"
Option "AccelMethod" "sna"
Option "Backlight" "intel_backlight" # use your backlight that
works here
BusID "PCI:0:2:0"
EndSection
"
The backlight control now works properly (indicator bubble and proper backlight
change). Furthermore, it is now possible to turn off the touchpad by using the
function key (the indicator bubble does show up).
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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/1392016
Title:
[Asus UL30VT] Backlight control does not work
Status in linux package in Ubuntu:
Incomplete
Bug description:
The backlight control on my Asus UL30VT has not worked for quite a
while. It used to work, a few ubuntu versions ago. The backlight
control bubble does show up when the function keys on the laptop are
pressed.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-39-generic 3.13.0-39.66
ProcVersionSignature: Ubuntu 3.13.0-39.66-generic 3.13.11.8
Uname: Linux 3.13.0-39-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.5
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: lina 2081 F.... pulseaudio
/dev/snd/controlC0: lina 2081 F.... pulseaudio
CurrentDesktop: Unity
Date: Wed Nov 12 20:20:31 2014
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=c8002bb0-2b05-4952-bc8b-bfcd29ac6117
InstallationDate: Installed on 2013-02-26 (623 days ago)
InstallationMedia: This
MachineType: ASUSTeK Computer Inc. UL30VT
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-39-generic
root=UUID=ff44dc17-e11a-4d44-8ab6-bf188f64ed83 ro quiet splash
acpi_backlight=vendor vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.13.0-39-generic N/A
linux-backports-modules-3.13.0-39-generic N/A
linux-firmware 1.127.8
SourcePackage: linux
UpgradeStatus: Upgraded to trusty on 2014-07-20 (115 days ago)
dmi.bios.date: 07/14/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 211
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: UL30VT
dmi.board.vendor: ASUSTeK Computer Inc.
dmi.board.version: 1.0
dmi.chassis.asset.tag: ATN12345678901234567
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer Inc.
dmi.chassis.version: 1.0
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr211:bd07/14/2010:svnASUSTeKComputerInc.:pnUL30VT:pvr1.0:rvnASUSTeKComputerInc.:rnUL30VT:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0:
dmi.product.name: UL30VT
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK Computer Inc.
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