Kernel Bug Tracker – Bug 9827
S3: no backlight on resume - Fujitsu Lifebook T2010, i965 graphics
Last modified: 2008-04-02 01:42:23 UTC
Never worked with any kernels tested (2.6.22, 2.6.23)
Distribution: Debian Unstable
Hardware Environment: Fujitsu Lifebook T2010, i965 graphics.
Problem Description: After suspending, the backlight fails to resume in both
the raw console, and Xorg. There is more information available at this bug:
http://bugs.freedesktop.org/show_bug.cgi?id=13709. The kernel exposes no backlight controls for this machine, and the X methods fail to bring back the backlight, with the exception of the native method iff I change the driver to make it default and I restart X after resume.
Steps to reproduce: "echo mem > /sys/power/state", hit the power button, and
note the screen is on, and everything but the backlight has resumed.
More information can be seen at: http://bugs.freedesktop.org/show_bug.cgi?id=13709
Ori, could you please attach:
1) output of acpidump
3) lspci -vvxxx
Created attachment 14591 [details]
Created attachment 14592 [details]
Created attachment 14593 [details]
ACPI has no influence on backlight restore,
it is the job of the video driver, and failing that,
the BIOS; so I'm moving this sighting from ACPI/suspend
Please try the "s2ram" application, as it has a number
of workarounds for this issue built into it.
If s2ram doesn't know about this laptop, you can
try the workarounds manually. They are listed in:
Erm...mine works fine with kernel 2.6.24.
Ori, can you verify as Alex said in comment# 6?
Close this bug due to no response from the bug reporter.