Backlight level reset to minimum on boot

[Μιχάλης Σιγάλας]

The main problem is with the brigthness of the screen. The system doesn't keep the custom settings of the backlight, so after restart, the brightness is again at the minimum level. That happens after every rstart.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: xorg 1:7.7+1ubuntu4
ProcVersionSignature: Ubuntu 3.5.0-18.29-generic 3.5.7
Uname: Linux 3.5.0-18-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 2.6.1-0ubuntu4
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CurrentDmesg:
 [ 22.485916] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
 [ 104.994787] audit_printk_skb: 33 callbacks suppressed
 [ 104.994800] type=1701 audit(1350759180.462:34): auid=4294967295 uid=1000 gid=1000 ses=4294967295 pid=2255 comm="chromium-browse" reason="seccomp" sig=0 syscall=39 compat=0 ip=0x7fdd9d8f0ed9 code=0x50000
 [ 1625.376860] type=1701 audit(1350760702.976:35): auid=4294967295 uid=1000 gid=1000 ses=4294967295 pid=4309 comm="chromium-browse" reason="seccomp" sig=0 syscall=39 compat=0 ip=0x7f08e871ded9 code=0x50000
Date: Sat Oct 20 22:19:29 2012
DistUpgraded: Fresh install
DistroCodename: quantal
DistroVariant: ubuntu
GraphicsCard:
 Advanced Micro Devices [AMD] nee ATI Wrestler [Radeon HD 6320] [1002:9806] (prog-if 00 [VGA controller])
   Subsystem: Hewlett-Packard Company Device [103c:3577]
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
MachineType: Hewlett-Packard Presario CQ57 Notebook PC
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=el_GR.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-18-generic root=UUID=153f70b4-3466-49e4-81ed-b87a2d4a7374 ro quiet splash vt.handoff=7
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/13/2011
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.43
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 3577
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 24.48
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnHewlett-Packard:bvrF.43:bd12/13/2011:svnHewlett-Packard:pnPresarioCQ57NotebookPC:pvr068E120000204910000620100:rvnHewlett-Packard:rn3577:rvr24.48:cvnHewlett-Packard:ct10:cvrChassisVersion:
dmi.product.name: Presario CQ57 Notebook PC
dmi.product.version: 068E120000204910000620100
dmi.sys.vendor: Hewlett-Packard
version.compiz: compiz 1:0.9.8.4-0ubuntu3
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.39-0ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.0-0ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.0-0ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.13.0-0ubuntu6
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.99.99~git20120913.8637f772-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.20.9-0ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.2-0ubuntu3

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Rafał Ochmański (rmopl)]

I'm also affected by this on Ubuntu 12.10, a workaround is to set the desired default backlight brightness by adding

# brightness fix after boot
echo 0 > /sys/class/backlight/acpi_video0/brightness

before exit 0

in /etc/rc.local. 0 is the minimum, usually, 0-15 can be used.

[Simos Xenitellis  (simosx)]

@m-sigalas86: I notice that you are not using fglrx (does not support your Evergreen graphics card). It's good.

@Rafał: I have tried that line and the whole screen highlights, returning to the original brightness. I cannot change the default brightness. I use 12.10 on the AMD 6230.