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Message #58991
[Bug 872652] Re: screensaver backlight stuck off, system looks hung
** Changed in: linux (Ubuntu)
Assignee: Kamal Mostafa (kamalmostafa) => (unassigned)
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https://bugs.launchpad.net/bugs/872652
Title:
screensaver backlight stuck off, system looks hung
Status in Gnome Settings Daemon:
Invalid
Status in “linux” package in Ubuntu:
Fix Released
Status in “linux” source package in Oneiric:
Fix Released
Bug description:
After the screensaver fades the screen to black and turns off the
backlight, tapping a keyboard key does NOT turn the backlight back on
again. The backlight is "stuck off" making the system appear to be
hung.
This a regression in Ubuntu 11.10.
----- (original problem description) -----
[The original problem description is below, however it has been
determined that the problem occurs with the the stock 11.10 release
kernel and does not actually relate to acpi_backlight=vendor.]
I have been using Kamal Mostafa's kernels for my Dell Studio 15 for a
few releases. Now, in oneiric, the brightness can not be changed
unless I add acpi_backlight=vendor to the kernel command line. The
brightness adjustment works fine when I make this change.
However, when I add this command line option, it introduces another
issue where when the display goes to sleep, it does not resume.
Somtimes I get the screen back by switching to a console tty and then
back to the X tty. But, the only reliable way I can get a screen to
come back on is to close the laptop lid (so the system suspends) and
then open it. The display will turn on for resume.
ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: linux-image-3.0.0-12-generic 3.0.0-12.20
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.23-0ubuntu3
Architecture: amd64
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: jrubin 3145 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xf0a00000 irq 45'
Mixer name : 'Intel IbexPeak HDMI'
Components : 'HDA:111d7675,10280413,00100103 HDA:80862804,80860101,00100000'
Controls : 20
Simple ctrls : 11
Date: Tue Oct 11 22:09:44 2011
HibernationDevice: RESUME=UUID=ffe5b171-a88d-44b8-9f4e-bca222ce60bd
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100427.1)
MachineType: Dell Inc. Studio 1558
ProcEnviron:
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.0.0-12-generic root=/dev/mapper/hostname-root ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.0.0-12-generic N/A
linux-backports-modules-3.0.0-12-generic N/A
linux-firmware 1.60
SourcePackage: linux
StagingDrivers: mei
UpgradeStatus: Upgraded to oneiric on 2011-10-03 (8 days ago)
dmi.bios.date: 03/30/2011
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A12
dmi.board.name: 0G939P
dmi.board.vendor: Dell Inc.
dmi.board.version: A12
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: A12
dmi.modalias: dmi:bvnDellInc.:bvrA12:bd03/30/2011:svnDellInc.:pnStudio1558:pvrA12:rvnDellInc.:rn0G939P:rvrA12:cvnDellInc.:ct8:cvrA12:
dmi.product.name: Studio 1558
dmi.product.version: A12
dmi.sys.vendor: Dell Inc.
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