Public bug reported:
When my HP Mini 110-1000 is running on AC power, screen brightness works
correctly. However, when I'm running on battery, the following happens
after about 20 seconds or so of no user activity:
- First, the screen gets *brighter*--nearly 100% brightness.
- Second, the keyboard brightness keys are inverted: the brightness up key
decreases brightness and vice versa. However, brightness only varies over a
narrow range which is entirely brighter than the normal brightness for running
on battery.
- Moving the mouse or hitting a "normal" key restores brightness to the
expected levels for battery mode and restores the brightness keys to normal
operation. After about 20 seconds of no user input, the bug pops up again.
I'm running Oneiric with kernel 3.0.0-15-generic. I first noticed this
bug upon upgrading to Oneiric, but another bug kept me running a Natty
kernel (2.6.38-10) until recently. Natty kernels didn't exhibit this
bug, so it's a regression. Unfortunately, I'm not running Precise, so I
can't test it.
ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: linux-image-3.0.0-15-generic 3.0.0-15.25
ProcVersionSignature: Ubuntu 3.0.0-15.25-generic 3.0.13
Uname: Linux 3.0.0-15-generic i686
NonfreeKernelModules: wl
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
AplayDevices:
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
ApportVersion: 1.23-0ubuntu4
Architecture: i386
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: scott 1993 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xfe938000 irq 42'
Mixer name : 'IDT 92HD81B1X5'
Components : 'HDA:111d7605,103c308f,00100402'
Controls : 14
Simple ctrls : 9
Date: Sun Jan 22 20:34:47 2012
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
MachineType: Hewlett-Packard HP Mini 110-1000
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-15-generic
root=UUID=65340dbf-705f-409d-8bfa-54f408fe23c9 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.0.0-15-generic N/A
linux-backports-modules-3.0.0-15-generic N/A
linux-firmware 1.60
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/18/2009
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: 308F0 Ver. F.07
dmi.board.name: 308F
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 02.0B
dmi.chassis.asset.tag: CNU932B9KK
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias:
dmi:bvnHewlett-Packard:bvr308F0Ver.F.07:bd06/18/2009:svnHewlett-Packard:pnHPMini110-1000:pvr03A8100000000000100300000:rvnHewlett-Packard:rn308F:rvrKBCVersion02.0B:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: HP Mini 110-1000
dmi.product.version: 03A8100000000000100300000
dmi.sys.vendor: Hewlett-Packard
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug i386 oneiric running-unity
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https://bugs.launchpad.net/bugs/920281
Title:
Screen brightness inverted when on battery
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