Comment 0 for bug 1178796

Not working since the upgrade to Raring. Used to work on 12.10.

Not working neither with linux-image-3.9.1-030901-generic_3.9.1-030901.201305080210 from http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.9.1-saucy/

Hotkeys are detected, showkey -s:
Fn+F5:
0xe0 0x4c 0xe0 0xcc
Fn+F6:
0xe0 0x54 0xe0 0xd4

I also attach the results from tests described on https://wiki.ubuntu.com/Kernel/Debugging/Backlight.

Test with acpi_backlight=vendor:
- on 3.8.0-20.31-generic, no change. But echo 8 > /sys/class/backlight/intel_backlight/brightness makes the screen dark, moreover /sys/class/backlight/intel_backlight/max_brightness = 2583660
- on 3.9.1, no brightness change but the KDE notification pops up with only 3 levels (0, 53, 100%)

Test with video.use_bios_initial_backlight=0:
- on 3.8.0-20.31-generic, no change.

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: linux-image-3.8.0-20-generic 3.8.0-20.31
ProcVersionSignature: Ubuntu 3.8.0-20.31-generic 3.8.11
Uname: Linux 3.8.0-20-generic x86_64
ApportVersion: 2.9.2-0ubuntu8
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: guillaume 2490 F.... pulseaudio
 /dev/snd/controlC0: guillaume 2490 F.... pulseaudio
Date: Fri May 10 12:14:58 2013
HibernationDevice: RESUME=/dev/sda6
InstallationDate: Installed on 2010-01-19 (1207 days ago)
InstallationMedia: Kubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
MachineType: ASUSTeK Computer Inc. UL80VT
MarkForUpload: True
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-20-generic root=UUID=d92f3a31-9e9c-4c19-98be-6fbc82629a36 ro video.use_bios_initial_backlight=0 quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.8.0-20-generic N/A
 linux-backports-modules-3.8.0-20-generic N/A
 linux-firmware 1.106
SourcePackage: linux
UpgradeStatus: Upgraded to raring on 2013-04-27 (12 days ago)
dmi.bios.date: 01/17/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 214
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: UL80VT
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.:bvr214:bd01/17/2011:svnASUSTeKComputerInc.:pnUL80VT:pvr1.0:rvnASUSTeKComputerInc.:rnUL80VT:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0:
dmi.product.name: UL80VT
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK Computer Inc.