Latest working kernel version: 2.6.27.X
Earliest failing kernel version: 2.6.28.X
Distribution:Slackware 12.2 (current)
Hardware Environment: Lenovo 3000 C100 (i915GM)
Problem Description: If I boot on my PC linux-2.6.28.X LCD powerdown isn't
Steps to reproduce:
If I set "setterm -blank 5 -powerdown on, setterm -powerdown 15" it goes only
LCD blanking but powerdown isn't functional. In the X (x11-xorg + KDE4.2) I set
xset dpms force off
DPMS don't work too.
Created attachment 20201 [details]
Here is my .config.
From the description it seems that this is a regression.
Will you please use the git-bisect to identify the first bad commit which causes the regression?
sorry, but at this time I don't have the opportunity to test older working kernel with git-bisect.I don't have source and .config 2.6.27.X kernel version.
(switched to email. Please respond via emailed reply-to-all, not via the
bugzilla web interface).
On Wed, 11 Feb 2009 09:40:40 -0800 (PST)
> Summary: DPMS (LCD powersave, poweroff) don't work
> Product: Power Management
> Version: 2.5
> KernelVersion: 126.96.36.199
> Platform: All
> OS/Version: Linux
> Tree: Mainline
> Status: NEW
> Severity: normal
> Priority: P1
> Component: Other
> AssignedTo: firstname.lastname@example.org
> ReportedBy: email@example.com
> Latest working kernel version: 2.6.27.X
> Earliest failing kernel version: 2.6.28.X
> Distribution:Slackware 12.2 (current)
> Hardware Environment: Lenovo 3000 C100 (i915GM)
> Software Environment:
> Problem Description: If I boot on my PC linux-2.6.28.X LCD powerdown isn't
> Steps to reproduce:
> If I set "setterm -blank 5 -powerdown on, setterm -powerdown 15" it goes only
> LCD blanking but powerdown isn't functional. In the X (x11-xorg + KDE4.2) I
> xset +dpms
> xset dpms force off
> DPMS don't work too.
We seem to have a DPMS-related regression here and I don't even know
which subsystem might have caused the breakage. (iow: who do I blame? ;))
Bug #12653 could be a dup, but affects 2.6.26 as well.
The DPMS is controlled by graphics driver. And it is not touched by ACPI/PM.
Maybe you should open a new bug at http://bugs.freedesktop.org/ and attach the corresponding info.
As the LVDS DPMS is not controlled by OS, instead it is controlled by graphics driver.
IMO this is a graphics driver bug rather than a power management bug.
So this bug will be rejected.
It will be better that the bug reporter file the bug at http://bugs.freedesktop.org.
And this bug will be rejected.