On Wed, 17 Dec 2008 14:09:11 +0200
"ext Jarkko Nikula" <jarkko.nikula@xxxxxxxxx> wrote:
> On Tue, 16 Dec 2008 09:22:38 -0800
> "ext Tony Lindgren" <tony@xxxxxxxxxxx> wrote:
>
> > > > Oh, I just tested that sleep-while-idle worked when fb was blanked. I
> > > > had a script that forced the LCD off via /sys, sorry don't remember
> > > > the path now. Will be also heading to catch a plane in few hours, may
> > > > not be able to check it right now.
> > >
> > > 'echo 3 > /sys/class/graphics/fb0/blank' turns off the LCD, if that is what you
> > > mean.
> >
> > Thanks, that's what I did.
> >
> And it worked with N800. Battery current dropped below 10 mA after
> unplugging the USB cable so OMAP was going into retention.
>
FYI:
xorg.conf's Option "SuspendTime" seems to equal to blanking command 3
(VESA_POWERDOWN). Look drivers/video/omap/omapfb_main.c: omapfb_blank.
Section "ServerFlags"
Option "BlankTime" "0"
Option "StandbyTime" "0"
Option "SuspendTime" "1"
Option "OffTime" "0"
EndSection
I just tried this with xserver-xorg-video-fbdev from Debian/testing on
N800 and it went perfectly into retention. N810 didn't went and think
reason is that bootloader enables UART3 for the GPS chip.
Oh my, I always tought there is some magic between Xomap and omapfb how
the fb clocks are shutdown but lazy me newer bothered to check it from
kernel sources :-)
Jarkko
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