Backlight flickers between two brightness settings
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
Ubuntu |
New
|
Undecided
|
Unassigned |
Bug Description
I'm running the Ubuntu 9.10 beta on my MSI Wind U100 (intel atom laptop with 945gme graphics). After I log in, the backlight switches between the brightest and second brightest levels at a rate of 1Hz or so. This continues until I fiddle with the backlight settings via the brightness adjustment hardware keys. After that, everything seems to work correctly. When the backlight is changing, the corresponding backlight level shows up in the OSD.
I provide extra information or test things if necessary.
ProblemType: Bug
AplayDevices:
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC1200 Analog [ALC1200 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
Architecture: i386
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xffe00000 irq 16'
Mixer name : 'Realtek ALC1200'
Components : 'HDA:10ec0888,
Controls : 21
Simple ctrls : 13
Date: Sun Oct 4 12:48:51 2009
DistroRelease: Ubuntu 9.10
HibernationDevice: RESUME=
MachineType: MICRO-STAR INTERNATIONAL CO., LTD U-100
Package: linux-image-
ProcCmdLine: BOOT_IMAGE=
ProcEnviron:
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcVersionSign
RelatedPackageV
linux-
linux-firmware 1.20
RfKill:
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
SourcePackage: linux
Uname: Linux 2.6.31-11-generic i686
dmi.bios.date: 12/03/2008
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 4.6.3
dmi.board.
dmi.board.name: U-100
dmi.board.vendor: MICRO-STAR INTERNATIONAL CO., LTD
dmi.board.version: Ver.001
dmi.chassis.
dmi.chassis.type: 3
dmi.chassis.vendor: MICRO-STAR INTERNATIONAL CO., LTD
dmi.chassis.
dmi.modalias: dmi:bvnAmerican
dmi.product.name: U-100
dmi.product.
dmi.sys.vendor: MICRO-STAR INTERNATIONAL CO., LTD
After rebooting for a kernel upgrade, the backlight flickered at the login screen and stopped flickering before I logged in.