Screen brightness inverted when idle

[Scott Severance]

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.

- When I'm running on AC power, there's no change in screen brightness on inactivity. However, after inactivity, the brightness keys are still inverted. This mode is so subtle that for a long time I never noticed it and thought that this bug only occurred on battery.

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

[penalvch (penalvch)]

Scott Severance, this bug was reported a while ago and there hasn't been any activity in it recently. We were wondering if this is still an issue? If so, could you please test for this with the latest development release of Ubuntu? ISO images are available from http://cdimage.ubuntu.com/daily-live/current/ .

If it remains an issue, could you please run the following command in the development release from a Terminal (Applications->Accessories->Terminal), as it will automatically gather and attach updated debug information to this report:

apport-collect -p linux <replace-with-bug-number>

[Scott Severance (scott.severance)]

I am no longer able to reproduce this bug.

[penalvch (penalvch)]

Scott Severance, this bug report is being closed due to your last comment https://bugs.launchpad.net/ubuntu/+source/linux/+bug/920281/comments/3 regarding this being fixed with an update. For future reference you can manage the status of your own bugs by clicking on the current status in the yellow line and then choosing a new status in the revealed drop down box. You can learn more about bug statuses at https://wiki.ubuntu.com/Bugs/Status. Thank you again for taking the time to report this bug and helping to make Ubuntu better. Please submit any future bugs you may find.