[Bug 660872] [NEW] [TOSHIBA Satellite Pro A300] Screen goes blank occasionally.

[John McCabe-Dansted]

Public bug reported:

Every couple of days my screen goes blank.
 * Typing or moving mouse does not bring back screen. (unlike screen saver)
 * Screen can go blank while I am typing. (unlike screen saver)
 * Does not affect external monitor, so I can use external monitor when the laptop screen is blank.
 * Adjusting Screen brightness (via FN-F6 and FN-F7) adjusts the brightness of the backlight, but screen remains blank
 * Suspending and waking up usually causes screen to come right.
 * Occurs with stock Ubuntu Kernel and also 2.6.36-020636rc3-generic
 * Does not only occur when computer is idle, once the screen disappeared while I was typing.
 * I can reproduce this problem in Ubuntu 10.04 LTS and in Ubuntu 10.10 RC.
 * This bug may be related to bug #477842.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: linux-image-2.6.32-25-generic 2.6.32-25.44
Regression: No
Reproducible: No
ProcVersionSignature: Ubuntu 2.6.32-25.44-generic 2.6.32.21+drm33.7
Uname: Linux 2.6.32-25-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC268 Analog [ALC268 Analog]
   Subdevices: 0/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  john       1598 F.... pulseaudio
 /dev/snd/pcmC0D0c:   john       1598 F...m pulseaudio
 /dev/snd/pcmC0D0p:   john       1598 F...m pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xd6500000 irq 22'
   Mixer name	: 'Realtek ALC268'
   Components	: 'HDA:10ec0268,1179ff1e,00100003 HDA:11c11040,11790001,00100200'
   Controls      : 18
   Simple ctrls  : 10
Date: Fri Oct 15 07:52:34 2010
Frequency: Once every few days.
HibernationDevice: RESUME=UUID=dc9572d1-9c99-49ee-a214-93cc96ceffac
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
MachineType: TOSHIBA Satellite Pro A300
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-25-generic root=UUID=abd69617-a25d-40ec-9451-d7aec9d5e298 ro quiet splash
ProcEnviron:
 PATH=(custom, user)
 LANG=en_AU.utf8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.34.1
SourcePackage: linux
dmi.bios.date: 12/07/2009
dmi.bios.vendor: INSYDE
dmi.bios.version: 2.20
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Portable PC
dmi.board.vendor: TOSHIBA
dmi.board.version: Base Board Version
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Chassis Manufacturer
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnINSYDE:bvr2.20:bd12/07/2009:svnTOSHIBA:pnSatelliteProA300:pvrPSAGDA-03D00R:rvnTOSHIBA:rnPortablePC:rvrBaseBoardVersion:cvnChassisManufacturer:ct10:cvrChassisVersion:
dmi.product.name: Satellite Pro A300
dmi.product.version: PSAGDA-03D00R
dmi.sys.vendor: TOSHIBA

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


** Tags: amd64 apport-bug graphics lucid needs-upstream-testing

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[TOSHIBA Satellite Pro A300] Screen goes blank occasionally.
https://bugs.launchpad.net/bugs/660872
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