Public bug reported:
I'm using a new Toshiba Portege Z830.
Brightness control keys on my laptop (Fn+F6 and Fn+F7) are working when
booting the 12.04 beta1 ISO image. They still work after installing
beta1 without the updates on the hard drive.
However, after applying the latest updates from the network, the
brightness controls are not working anymore.
There is a correct keypress event (not sure if it's normal that it appears 4
times for each keypress though):
$ xev | sed -n 's/^.*state \([0-9].*\), keycode *\([0-9]\+\) *\(.*\),
.*$/keycode \2 = \3, state = \1/p'
keycode 232 = (keysym 0x1008ff03, XF86MonBrightnessDown), state = 0x10
keycode 232 = (keysym 0x1008ff03, XF86MonBrightnessDown), state = 0x10
keycode 232 = (keysym 0x1008ff03, XF86MonBrightnessDown), state = 0x10
keycode 232 = (keysym 0x1008ff03, XF86MonBrightnessDown), state = 0x10
keycode 233 = (keysym 0x1008ff02, XF86MonBrightnessUp), state = 0x10
keycode 233 = (keysym 0x1008ff02, XF86MonBrightnessUp), state = 0x10
keycode 233 = (keysym 0x1008ff02, XF86MonBrightnessUp), state = 0x10
keycode 233 = (keysym 0x1008ff02, XF86MonBrightnessUp), state = 0x10
And an ACPI event is generated:
$ sudo acpi_listen
video DD01 00000087 00000000
video DD01 00000086 00000000
However, there is no scancode generated in keymap:
$ sudo /lib/udev/findkeyboards
AT keyboard: input/event3
$ sudo /lib/udev/keymap -i input/event3
Press ESC to finish, or Control-C if this device is not your primary keyboard
Finally, the following line appears on each keypress in /var/log/kern.log:
Mar 7 21:01:53 portege kernel: [ 636.342659] ACPI: Failed to switch the
brightness
This is a regression between beta1 and the latest updates of 12.04
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.2.0-18-generic 3.2.0-18.28
ProcVersionSignature: Ubuntu 3.2.0-18.28-generic 3.2.9
Uname: Linux 3.2.0-18-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.94-0ubuntu2
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC269VB Analog [ALC269VB Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: alex 1673 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0xc0720000 irq 49'
Mixer name : 'Intel CougarPoint HDMI'
Components : 'HDA:10ec0269,11790638,00100100
HDA:80862805,11790001,00100000'
Controls : 24
Simple ctrls : 11
Date: Wed Mar 7 20:52:04 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120301)
MachineType: TOSHIBA PORTEGE Z830
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-18-generic
root=UUID=3e7b6352-a853-4790-9850-c3388a0291f8 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.2.0-18-generic N/A
linux-backports-modules-3.2.0-18-generic N/A
linux-firmware 1.71
SourcePackage: linux
StagingDrivers: mei
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/08/2012
dmi.bios.vendor: TOSHIBA
dmi.bios.version: Version 1.60
dmi.board.asset.tag: 0000000000
dmi.board.name: Portable PC
dmi.board.vendor: TOSHIBA
dmi.board.version: Version A0
dmi.chassis.asset.tag: 0000000000
dmi.chassis.type: 10
dmi.chassis.vendor: TOSHIBA
dmi.chassis.version: Version 1.0
dmi.modalias:
dmi:bvnTOSHIBA:bvrVersion1.60:bd02/08/2012:svnTOSHIBA:pnPORTEGEZ830:pvrPT224L-009025:rvnTOSHIBA:rnPortablePC:rvrVersionA0:cvnTOSHIBA:ct10:cvrVersion1.0:
dmi.product.name: PORTEGE Z830
dmi.product.version: PT224L-009025
dmi.sys.vendor: TOSHIBA
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug precise regression staging
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https://bugs.launchpad.net/bugs/948978
Title:
Brightness control keys stopped working after latest 12.04 post beta1
update
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