[Bug 666217] [NEW] backlight controls on a toshiba r700 don't change backlight after resume from suspend

[Jon Dowland]

Public bug reported:

The backlight can be adjusted normally.  But after suspend, the
backlight will not adjust.

Minimal test case: boot to single user mode, tweak backlight using
/sys/class/backlight/toshiba/brightness, suspend via mem to
/sys/power/state.

Also reported at http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=599768

and upstream https://bugzilla.kernel.org/show_bug.cgi?id=21012

It has been discussed by other Ubuntu users at
http://ubuntuforums.org/showthread.php?t=1550219

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: linux-image-2.6.35-22-generic 2.6.35-22.33
Regression: No
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.35-22.33-generic 2.6.35.4
Uname: Linux 2.6.35-22-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC259 Analog [ALC259 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  jon        2007 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xd4720000 irq 48'
   Mixer name	: 'Intel IbexPeak HDMI'
   Components	: 'HDA:10ec0269,11790622,00100100 HDA:80862804,11790001,00100000'
   Controls      : 21
   Simple ctrls  : 10
Date: Mon Oct 25 11:35:18 2010
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=fe4f88e2-9293-4e3e-9ef9-730bf4e52367
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
MachineType: TOSHIBA PORTEGE R700
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-22-generic root=/dev/mapper/hostname-ubuntu ro quiet splash
ProcEnviron:
 LANG=en_GB.utf8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.38
SourcePackage: linux
dmi.bios.date: 08/26/2010
dmi.bios.vendor: TOSHIBA
dmi.bios.version: Version 1.50
dmi.board.asset.tag: 0000000000
dmi.board.name: Portable PC
dmi.board.vendor: TOSHIBA
dmi.board.version: Version A0
dmi.chassis.asset.tag: 0000000000
dmi.chassis.type: 10
dmi.chassis.vendor: TOSHIBA
dmi.chassis.version: Version 1.0
dmi.modalias: dmi:bvnTOSHIBA:bvrVersion1.50:bd08/26/2010:svnTOSHIBA:pnPORTEGER700:pvrPT311E-01P019EN:rvnTOSHIBA:rnPortablePC:rvrVersionA0:cvnTOSHIBA:ct10:cvrVersion1.0:
dmi.product.name: PORTEGE R700
dmi.product.version: PT311E-01P019EN
dmi.sys.vendor: TOSHIBA

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 kernel-power maverick needs-upstream-testing resume suspend

-- 
backlight controls on a toshiba r700 don't change backlight after resume from suspend
https://bugs.launchpad.net/bugs/666217
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