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Date:      Tue, 16 Nov 2010 14:44:00 +0000
From:      Bruce Cran <bruce@cran.org.uk>
To:        freebsd-stable@freebsd.org
Cc:        freebsd-multimedia@freebsd.org, Stefan Walter <stefan@freebsd.org>
Subject:   Re: 8.1-RELEASE: snd_hda works as module only, suspend/resume leaves display off
Message-ID:  <201011161444.00227.bruce@cran.org.uk>
In-Reply-To: <20101115093709.GA1452@birne.dunkelkammer.void>
References:  <20101115093709.GA1452@birne.dunkelkammer.void>

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On Monday 15 November 2010 09:37:09 Stefan Walter wrote:

> Suspend To RAM (S3) works by using "acpiconf -s 3", and pushing the power
> button wakes the system up again. Everything seems to work, only the LCD
> monitor remains off. (There also seem to be occasional cases in which the
> keyboard doesn't work any more, but I haven't really looked at that, yet.
> Usually, the system comes back up properly.) Loading dpms(4) doesn't seem
> to make a difference. The only way to turn the display on again seems to
> be typing "shutdown -r now" blindly.

What graphics card do you have? If it's nVidia, try building the driver with 
ACPI_PM enabled and running "acpiconf -s3" from X11. That boots the video chip 
up on my laptop at least - though it seems some corruption occurs because I've 
had some odd panics afterwards in the fs and vm subsystems, and attempting to 
suspend for a second time results in the system rebooting instead.

-- 
Bruce Cran



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