linux-kernel - Re: [Bugme-new] [Bug 12690] New: DPMS (LCD powersave, poweroff) don't work

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Date:	Thu, 12 Feb 2009 14:15:21 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
	linux-fbdev-devel@...ts.sourceforge.net
Cc:	bugme-daemon@...zilla.kernel.org, akolisek@...uxx.hyperlinx.cz
Subject: Re: [Bugme-new] [Bug 12690] New: DPMS (LCD powersave, poweroff)
 don't work


(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@...zilla.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@...nel-bugs.osdl.org
>         ReportedBy: akolisek@...uxx.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.
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