Bug#406417: i810: DualHead fails to resume after suspend

[Ariel Garcia <garcia@iwr.fzk.de>]

Hi,

> Does any of you guys still reproduce this problem with a black screen
> after suspend/resume with the latest xserver-xorg-video-intel driver in
> dual-head? If so, it would be good if all of you could try with the
...
> If you still experience a black screen at resume, you should try either
> passing acpi_sleep=s3_bios to the kernel, or use vbetool post after

as i am being hit by Bug#427811, i am not really sure if i can post useful 
info here. But yes, my suspending uses vbetool already.

Also i suspend by doing essentially:

# fujitsu laptop, so read/restore backlight
#    from /proc/acpi/fuj02b1/brightness
        save_brightness 
        save_vbestate
# suspending with:
        echo -n "mem" > /sys/power/state
        restore_vbestate
        restore_brightness

where save/restore_vbestate do:

save_vbestate() {
        VBEMODE=`vbetool vbemode get`
        CURRENT_VT=`fgconsole`
        chvt 1
        vbetool vbestate save > $VBE_FILE
        [ -n "$VCSA_RESTORE" ] && cat /dev/vcsa > $VCSA_FILE
}

restore_vbestate() {
        VBEMODE_TMP=`vbetool vbemode get`
        vbetool post
        vbetool vbestate restore < $VBE_FILE
        [ -n "$VCSA_RESTORE" ] && cat $VCSA_FILE > /dev/vcsa
        /etc/init.d/915resolution start
        vbetool vbemode set $VBEMODE
        sleep 1
        chvt $CURRENT_VT
        rm -f $VBE_FILE
}

Note:  915resolution is now there again because of xorg-video-i810, but at 
that time i had disabled it

Cheers, Ariel