Personal Computer World 2009 February/PCWFEB09.iso/Software/Linux/Kubuntu 8.10/kubuntu-8.10-desktop-i386.iso/casper/filesystem.squashfs/usr/lib/pm-utils/sleep.d/99video

Text File | 2008-10-15 | 5KB | 174 lines

#!/bin/sh
#
# Copyright 2006-2007 Richard Hughes <[e-mail]>
# Copyright 2007 Peter Jones <[e-mail]>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of version 2 of the GNU General Public License as
# published by the Free Software Foundation.

# Handle video quirks.  If you are having suspend/resume issues,
# troubleshooting using this hook is probably the best place to start.
# If it weren't for video card quirks, suspend/resume on Linux would be
# a whole lot more stable.

. "${PM_FUNCTIONS}"

for opt in $PM_CMDLINE; do
    case "${opt##--quirk-}" in # just quirks, please
        dpms-on)        QUIRK_DPMS_ON="true" ;;
        dpms-suspend)        QUIRK_DPMS_SUSPEND="true" ;;
        radeon-off)        QUIRK_RADEON_OFF="true" ;;
        reset-brightness)  QUIRK_RESET_BRIGHTNESS="true" ;;
        s3-bios)        QUIRK_S3_BIOS="true" ;;
        s3-mode)        QUIRK_S3_MODE="true" ;;
        vbe-post)        QUIRK_VBE_POST="true" ;;
        vbemode-restore)   QUIRK_VBEMODE_RESTORE="true" ;;
        vbestate-restore)  QUIRK_VBESTATE_RESTORE="true" ;;
        vga-mode3)        QUIRK_VGA_MODE_3="true" ;;
        none)            QUIRK_NONE="true" ;;
        *) continue ;;
    esac
done

reset_brightness()
{
    for bl in /sys/class/backlight/* ; do
        [ -f "$bl/brightness" ] || continue
        BR="$(cat $bl/brightness)"
        echo 0 > "$bl/brightness"
        echo "$BR" > "$bl/brightness"
    done
}

if command_exists vbetool; then
    vbe() { vbetool "$@"; }
else
    vbe() { echo "vbetool not installed!" 1>&2; return 1; }
fi

if command_exists radeontool; then
    radeon() { radeontool "$@"; }
else
    radeon() { echo "radeontool not found" 1>&2; return 1; }
fi

save_fbcon()
{
    local con
    for con in /sys/class/graphics/*/state; do
        [ -f $con ] || continue
        echo 1 >"${con}"
    done
}

resume_fbcon()
{
    local con
    for con in /sys/class/graphics/*/state; do
        [ -f $con ] || continue
        echo 0 >"${con}"
    done
}

# Some tiny helper functions for quirk handling
quirk() { [ "$1" = "true" ] && [ -z $QUIRK_NONE ]; }

# save/restore vbe state
vbe_savestate() { vbe vbestate save |savestate vbestate; }
vbe_restorestate() {
    if [ -e /var/lib/acpi-support/vbestate ]; then
        vbe vbestate restore < /var/lib/acpi-support/vbestate
    else
        restorestate vbestate |vbe vbestate restore
    fi
}

# save/restore the vbe mode
vbe_savemode() { vbe vbemode get |savestate vbemode; }
vbe_restoremode()
{
    # this is a little mode complicated to handle special-casing mode 3.
    local vbemode=$(restorestate vbemode)
    if [ "$vbemode" = "3" ]; then
        vbe vgamode set $vbemode
    else
        vbe vbemode set $vbemode
    fi
}

# post the video card
vbe_post()
{
    local rom="/var/run/video.rom"
    # if we do not have a romfile, do not post with it.
    [ -f "$rom" ] || unset rom
    vbe post $rom
    sleep 0.1
}

# turn critical bits of radeon cards off/on
radeon_off() { radeon dac off; radeon light off; }
radeon_on() { radeon dac on; radeon light on; }

suspend_video()
{
    # 0=nothing, 1=s3_bios, 2=s3_mode, 3=both
    local acpi_flag=0
    quirk "${QUIRK_S3_BIOS}" &&         acpi_flag=$(($acpi_flag + 1))
    quirk "${QUIRK_S3_MODE}" &&         acpi_flag=$(($acpi_flag + 2))
    [ 0 -ne $acpi_flag ] && sysctl -w kernel.acpi_video_flags=$acpi_flag

    quirk "${QUIRK_VBESTATE_RESTORE}" &&     vbe_savestate
    quirk "${QUIRK_VBEMODE_RESTORE}" &&     vbe_savemode
    quirk "${QUIRK_RADEON_OFF}" &&         radeon_off
    quirk "${QUIRK_VGA_MODE_3}" &&         vbe vbemode set 3
    quirk "${QUIRK_DPMS_SUSPEND}" &&     vbe dpms suspend
    save_fbcon # there should be a quirk, but HAL does not pass it.
}
resume_video()
{
    # We might need to do one or many of these quirks
    quirk "${QUIRK_VBE_POST}" &&         vbe_post
    quirk "${QUIRK_VBESTATE_RESTORE}" &&     vbe_restorestate
    quirk "${QUIRK_VBEMODE_RESTORE}" &&     vbe_restoremode
    resume_fbcon     # also should be handled by a quirk.
    quirk "${QUIRK_RADEON_OFF}" &&         radeon_on
    quirk "${QUIRK_DPMS_ON}" &&         vbe dpms on
    quirk "${QUIRK_RESET_BRIGHTNESS}" &&     reset_brightness
    return 0  # avoid spurious hook exit failure message.
}

help() {
    echo  # first echo makes it look nicer.
    echo "Video quirk handler options:"
    echo
    echo "  --quirk-dpms-on"
    echo "  --quirk-dpms-suspend"
    echo "  --quirk-radeon-off"
    echo "  --quirk-reset-brightness"
    echo "  --quirk-s3-bios"
    echo "  --quirk-s3-mode"
    echo "  --quirk-vbe-post"
    echo "  --quirk-vbemode-restore"
    echo "  --quirk-vbestate-restore"
    echo "  --quirk-vga-mode3"
    echo "  --quirk-none"
}

case "$1" in
    suspend) suspend_video ;;
    hibernate)
        if [ "$HIBERNATE_RESUME_POST_VIDEO" = "yes" ]; then
            suspend_video
        fi
        ;;
    resume) resume_video ;;
    thaw)
        if [ "${HIBERNATE_RESUME_POST_VIDEO}" = "yes" ]; then
            resume_video
        fi
        ;;
    help) help ;;
esac