Public bug reported:
Brightness controls no longer function on Lenovo 3000 N100. Screen is
set very dim initially and cannot be altered.
Get 'ACPI: Failed to switch the brightness' in dmesg. Booting with
acpi=off makes things work again.
ProblemType: Bug
AplayDevices:
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC861-VD Analog [ALC861-VD Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC861-VD Analog [ALC861-VD Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: neil 2388 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xd0340000 irq 22'
Mixer name : 'Realtek ALC861-VD'
Components : 'HDA:10ec0862,17aa8e2d,00100001
HDA:11c11040,11c10001,00100200'
Controls : 19
Simple ctrls : 12
CheckboxSubmission: b382bfda81c9c56d0d686a30b144ce04
CheckboxSystem: 1e431fa57f6647496385ab519e345dd7
Date: Tue Sep 22 19:44:46 2009
DistroRelease: Ubuntu 9.10
HibernationDevice: RESUME=UUID=c779ba77-cadd-44f5-b908-870ff19b9ae1
MachineType: LENOVO 0768BXG
Package: linux-image-2.6.31-10-generic 2.6.31-10.34
PccardctlIdent:
Socket 0:
no product info available
PccardctlStatus:
Socket 0:
no card
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.31-10-generic
root=UUID=9ddd7600-9f82-496c-b868-b3a5d57b9dc9 ro quiet splash
ProcEnviron:
LANG=en_GB.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-10.34-generic
RelatedPackageVersions:
linux-backports-modules-2.6.31-10-generic N/A
linux-firmware 1.19
SourcePackage: linux
Uname: Linux 2.6.31-10-generic x86_64
dmi.bios.date: 04/30/07
dmi.bios.vendor: LENOVO
dmi.bios.version: 63ET62WW
dmi.board.name: CAPELL VALLEY(NAPA) CRB
dmi.board.vendor: LENOVO
dmi.board.version: Not Applicable
dmi.chassis.type: 10
dmi.chassis.vendor: No Enclosure
dmi.chassis.version: N/A
dmi.modalias:
dmi:bvnLENOVO:bvr63ET62WW:bd04/30/07:svnLENOVO:pn0768BXG:pvr3000N100:rvnLENOVO:rnCAPELLVALLEY(NAPA)CRB:rvrNotApplicable:cvnNoEnclosure:ct10:cvrN/A:
dmi.product.name: 0768BXG
dmi.product.version: 3000 N100
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug regression-potential
--
ACPI: Failed to switch the brightness
https://bugs.launchpad.net/bugs/434822
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