Toshiba Tecra 8000 Suspend to RAM using ACPI on Fedora Core 2

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Date: Sat, 9 Oct 2004 19:25:58 -0600
To: Toshiba Linux users <tlinux-users@tce.toshiba-dme.co.jp>, fedora-list@redhat.com, fedora-docs-list@redhat.com

There I was, out in the Big Horn Mountains, with a bunch of GPS data
on my Toshiba Tecra 8000, collected with GPSDrive
(http://www.gpsdrive.cc/). I had just upgraded from Fedora Core 1 to
Fedora Core 2 (FC2). I decided to take a break and enjoy the mountains
around me in peace and quiet. I hit the power button, which on many
Toshibas puts the machine into RAM suspension. Which used to put this
machine into RAM suspension. Oops, it shut down instead, loosing my
data. Arrgh!

Well! I started doing a bit of research on ACPI
(http://acpi.sourceforge.net/), the power management system in FC2,
and John Belmonte's extension for Toshiba laptops
(http://memebeam.org/toys/ToshibaAcpiDriver). That and some emails on
the Toshiba Linux List
(http://linux.toshiba-dme.co.jp/linux/index.htm), and I was able to
put together what I needed.

This script comes with absolutely nothing, not even a guarantee to be
useful for wrapping fish.

There are two gotchas.

* MySQL on FC2 does not want to suspend to ram. The workaround is to
  shut it down prior to suspension and restart it afterwards. This has
  the added advantage that it forces MySQL to flush to disk.

* My USB floppy drive looses its marbles briefly after powerup, but
  recovers. One workaround would be to shut down the USB driver, as
  Belmonte does in the script from which I cribbed, but this works
  well enough for me.

You need two files. In /etc/acpi/events, put the file power.button,
which looks like so:

--------------------------------------------------
# Power button instruction for ACPI.
 
# Time-stamp: <2004-10-09 18:36:19 root power.button>
 
event=button/power.*
action=/etc/acpi/actions/power.button.sh
--------------------------------------------------

Actually you can call it anything you want, as long as it isn't a
hidden file (the file name has a period as its first letter).

In /etc/acpi/actions/, put the script power.button.sh, which looks
like so:

--------------------------------------------------
# Run this script when the user hits the power button.
                                                                                
# Time-stamp: <2004-10-09 19:04:16 root power.button.sh>
                                                                                
# Check for hint to ignore power button. This is useful for wake from
# suspend to RAM, etc. If we don't do this, the computer will cycle
# through suspensions forever, or until it runs out of power. There
# seems to be a debounce problem. From
# http://memebeam.org/toys/ToshibaLibretto
                                                                                
POWER_IGNORE=/var/run/ignore_powerbtn
if [ -f $POWER_IGNORE ]; then
    rm -f $POWER_IGNORE
    exit 0
fi
 
 
# MySQL-3.23.58-9 refuses to shut down. Well, we'll fix that!
 
STATUS=`service mysqld status | grep -i running | cut -f1 -d' '`
 
echo "mysqld status is: \"$STATUS\""
 
# If the daemon is running, we shut it down.
 
if [ ! -z $STATUS ]; then
 
    echo "Shutting down mysqld."
    service mysqld stop
 
 
    while ! service mysqld status | grep -i stopped ; do
        echo "Waiting...."
    done
 
fi
 
sync
 
# So we know to ignore this script on the way back up...
touch /var/run/ignore_powerbtn
sleep 1
 
# Do the deed...
echo 3 > /proc/acpi/sleep
 
sleep 4

if [ ! -z $STATUS ]; then

    echo "Firing up mysqld."
    service mysqld start

    # Spin until the daemon is running.

    while ! service mysqld status | grep -i running ; do
        echo "Waiting on MySQL Start...."
    done

fi
 
exit 0

--------------------------------------------------

Rename to a hidden file or delete the sample.conf file in
/etc/acpi/events.

To make the change effective, run "service acpid restart".

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