linux-kernel - Re: [linux-pm] Suspend to RAM, Sony Vaio PCG-SRX51P, lcd stays off

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Date:	Thu, 15 Feb 2007 11:36:39 +0100
From:	Pavel Machek <pavel@....cz>
To:	Jan Dittmer <jdi@....org>
Cc:	stelian@...ies.net, linux-acpi@...r.kernel.org, linux-pm@...l.org,
	adaplas@....net, dawes@...ee86.org,
	Linux kernel <linux-kernel@...r.kernel.org>
Subject: Re: [linux-pm] Suspend to RAM, Sony Vaio PCG-SRX51P, lcd stays off

Hi!

> I own an older Sony Vaio SRX51P, European Model, P3 based. s2ram
> identifies it with
> 
>     sys_vendor   = "Sony Corporation    "
>     sys_product  = "PCG-SRX51P(DE)      "
>     sys_version  = "01                  "
>     bios_version = "R0232U2"
> 
> Suspend to RAM by using "s2ram -v -m -f" actually works and the
> laptop comes back to life, is accessible by network, etc. kudos
> so far.
> The only but serious problem is, that the lcd stays off after
> resume. No matter what kind of options for s2ram I try, if I disable

Is the _lcd_ off or the _backlight_ off? Use bright flashlight to
tell.

> framebuffer or suspend from X, the lcd always stays off. Only
> a reboot fixes this. Note that the X driver also cannot dis-/enable
> the lcd (xset dpms force off). It always stays lit. I also tried
> with i810switch, but that also does not affect the lcd.
> spicctrl -b42 neither.
> Latest kernel I tested is 2.6.20-git11 from today.
> 
> So has anyone of you suspend, acpi, sonypi, fb people an idea how to fix
> this? I suspect one has to call some magic ACPI method upon resume? What
> other kind of information would be needed to debug this? Anything more
> to try? Are there some sony people here listening who can fix this?

sonypi people actually might know how to help...

> 00:02.0 VGA compatible controller: Intel Corporation 82815 CGC
[Chipset Graphics Controller] (rev 11)

Wait a moment, did not Intel release nice, commented, GPLed sources
for their graphics cards somewhere? That might help.
								Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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