Bug 12690 - DPMS (LCD powersave, poweroff) don't work
Summary: DPMS (LCD powersave, poweroff) don't work
Status: CLOSED INVALID
Alias: None
Product: Power Management
Classification: Unclassified
Component: Other (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: ykzhao
URL:
Keywords:
Depends on:
Blocks: 11808
  Show dependency tree
 
Reported: 2009-02-11 09:40 UTC by Antonin Kolisek
Modified: 2011-03-03 01:21 UTC (History)
3 users (show)

See Also:
Kernel Version: 2.6.28.4
Tree: Mainline
Regression: Yes


Attachments
.config (53.09 KB, application/octet-stream)
2009-02-11 09:42 UTC, Antonin Kolisek
Details

Description Antonin Kolisek 2009-02-11 09:40:40 UTC
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
functional.

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
xset dpms force off
DPMS don't work too.
Comment 1 Antonin Kolisek 2009-02-11 09:42:11 UTC
Created attachment 20201 [details]
.config

Here is my .config.
Comment 2 ykzhao 2009-02-11 19:23:16 UTC
Hi, Antonin
    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?
    Thanks.
Comment 3 Antonin Kolisek 2009-02-12 08:44:53 UTC
Hello,
  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.

Thanks.
Comment 4 Anonymous Emailer 2009-02-12 14:15:34 UTC
Reply-To: akpm@linux-foundation.org


(switched to email.  Please respond via emailed reply-to-all, not via the
bugzilla web interface).

Help.

On Wed, 11 Feb 2009 09:40:40 -0800 (PST)
bugme-daemon@bugzilla.kernel.org wrote:

> http://bugzilla.kernel.org/show_bug.cgi?id=12690
> 
>            Summary: DPMS (LCD powersave, poweroff) don't work
>            Product: Power Management
>            Version: 2.5
>      KernelVersion: 2.6.28.4
>           Platform: All
>         OS/Version: Linux
>               Tree: Mainline
>             Status: NEW
>           Severity: normal
>           Priority: P1
>          Component: Other
>         AssignedTo: power-management_other@kernel-bugs.osdl.org
>         ReportedBy: akolisek@linuxx.hyperlinx.cz
> 
> 
> 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
> functional.
> 
> 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
> 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? ;))

Thanks.
Comment 5 Real Name 2009-03-13 13:22:51 UTC
Bug #12653 could be a dup, but affects 2.6.26 as well.
Comment 6 ykzhao 2009-03-18 20:02:47 UTC
Hi, Antonin
    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.
    Thanks.
Comment 7 ykzhao 2009-07-20 14:49:24 UTC
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.
Thanks.
Comment 8 ykzhao 2009-07-20 14:51:04 UTC
It will be better that the bug reporter file the bug at http://bugs.freedesktop.org.
And this bug will be rejected.

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