This probably isn't a kernel issue. Backlight drivers generally only
change the brightness when told to do so by userspace, although
sometimes system firmware plays a role as well.
But based on the described behavior, I suspect that it was userspace
setting the brightness value when the login screen appeared. gnome-
settings-daemon is what will actually be applying the brightness
settings, so I'm going to reassign the Linux task to that.
** Package changed: linux (Ubuntu) => gnome-settings-daemon (Ubuntu)
** Changed in: gnome-settings-daemon (Ubuntu)
Status: Triaged => Confirmed
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https://bugs.launchpad.net/bugs/974260
Title:
Brightnes of laptop panel is set to minimum when system starts
Status in Light Display Manager:
New
Status in “gnome-settings-daemon” package in Ubuntu:
Confirmed
Bug description:
The brightness of laptop panel is set to minimum instead to maximum when
system starts. In Natty and older Ubuntu versions it was set to minimum during
boot, and wold go to maximum just before login screen. In Onerick and Precise
it just stays at minimum until changed manually to higher values. Laptop is
connected to power.
I have Nvidia G105M GPU. On laptop with Intel graphics and Onerick I can't
reproduce this.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.2.0-22-generic 3.2.0-22.35
ProcVersionSignature: Ubuntu 3.2.0-22.35-generic 3.2.14
Uname: Linux 3.2.0-22-generic x86_64
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0-0ubuntu4
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: mile 1998 F.... pulseaudio
CheckboxSubmission: 9448ae01985a062cb9f7d6705930e25a
CheckboxSystem: 2954e74ba17fb0e37fc942cd1d9fab4e
Date: Thu Apr 5 15:31:51 2012
HibernationDevice: RESUME=UUID=4dfa8c64-5b19-422d-be25-6053b9b44eab
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64 (20111004)
MachineType: Acer Extensa 5635G
ProcFB: 0 VESA VGA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-22-generic
root=UUID=67f9c537-e53e-444a-98d0-12afd884e79e ro quiet splash pcie_aspm=force
vt.handoff=7
SourcePackage: linux
UpgradeStatus: Upgraded to precise on 2012-01-07 (88 days ago)
dmi.bios.date: 12/21/2009
dmi.bios.vendor: Phoenix
dmi.bios.version: V1.3311
dmi.board.name: BA50-MV
dmi.board.vendor: Acer
dmi.board.version: Not Applicable
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: N/A
dmi.modalias:
dmi:bvnPhoenix:bvrV1.3311:bd12/21/2009:svnAcer:pnExtensa5635G:pvrNotApplicable:rvnAcer:rnBA50-MV:rvrNotApplicable:cvnAcer:ct10:cvrN/A:
dmi.product.name: Extensa 5635G
dmi.product.version: Not Applicable
dmi.sys.vendor: Acer
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