Hi, Alexander Clouter <[EMAIL PROTECTED]> [20080728 11:45:33 +0100]: > > Hi, > > Whilst trying to get our Dull server to wakeup at a specific time I had a go > at playing around > with the ACPI RTC wakeup alarm[1] functionality of the system. Apart from > being disappointed > at Dull using sub-standard parts and only giving me an upper limit of 24 > hours into the future > for a wakeup event I found that the Debian hwclock.sh inadvertantly nukes > this ability on > shutdown[2]. > This might actually be a bad idea for a patch on systems that only support 24 hour upper limit wakeups. There is a rather common side effect that it will look like the wakeup timer has been set when in fact it has not. I'm looking into the new RTC framework for a better solution.
Cheers Alex > I have attached a patch that tests if the RTC alarm has been set to a time in > the future and > if so restore it after the --systohc command is executed; thus letting this > handy but not > often used functionality work. > > Hopefully it's considered sane :) > > Cheers > > Alex > > [1] http://acpi.sourceforge.net/documentation/alarm.html > [2] http://www.mythtv.org/wiki/index.php/ACPI_Wakeup#Disable_hwclock_updates > > -- System Information: > Debian Release: lenny/sid > APT prefers unstable > APT policy: (500, 'unstable') > Architecture: i386 (i686) > > Kernel: Linux 2.6.26 (SMP w/2 CPU cores) > Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8) > Shell: /bin/sh linked to /bin/bash > > Versions of packages util-linux depends on: > ii libc6 2.7-12 GNU C Library: Shared libraries > ii libncurses5 5.6+20080713-1 shared libraries for terminal > hand > ii libselinux1 2.0.65-2 SELinux shared libraries > ii libslang2 2.1.3-3 The S-Lang programming library - > r > ii libuuid1 1.41.0-3 universally unique id library > ii lsb-base 3.2-15 Linux Standard Base 3.2 init > scrip > ii tzdata 2008c-1 time zone and daylight-saving > time > ii zlib1g 1:1.2.3.3.dfsg-12 compression library - runtime > > util-linux recommends no packages. > > Versions of packages util-linux suggests: > ii console-tools 1:0.2.3dbs-65.1 Linux console and font utilities > ii dosfstools 2.11-6 utilities for making and > checking > ii util-linux-locales 2.13.1.1-1 Locales files for util-linux > > -- no debconf information > --- /etc/init.d/hwclock.sh.orig 2007-12-22 13:47:04.000000000 +0000 > +++ /etc/init.d/hwclock.sh 2008-07-28 11:37:21.533178944 +0100 > @@ -96,6 +96,20 @@ > # WARNING: If you disable this, any changes to the system > # clock will not be carried across reboots. > # > + # We also check to see if the RTC Alarm has been set and restore > + # it if it's applicable (set to a time in the future) > + # FIXME: rtc0 => rtcN? > + # > + for RTCALARMDEV in /sys/class/rtc/rtc0/wakealarm /proc/acpi/alarm; > do > + if [ -e $RTCALARMDEV ]; then > + RTCWAKETIME=`cat $RTCALARMDEV` > + if [ `date -d "$RTCWAKETIME" +%s` -le `date +%s` ]; then > + RTCWAKETIME="" > + fi > + > + break > + fi > + done > if [ "$HWCLOCKACCESS" != no ]; then > log_action_msg "Saving the system clock." > if [ "$GMT" = "-u" ]; then > @@ -106,6 +120,10 @@ > else > verbose_log_action_msg "Not saving System Clock" > fi > + if [ "$RTCWAKETIME" != "" ]; then > + log_action_msg "Priming RTC Alarm for $RTCWAKETIME" > + echo "$RTCWAKETIME" > $RTCALARMDEV > + fi > ;; > show) > if [ "$HWCLOCKACCESS" != no ]; then -- __________________________ / Well begun is half done. \ | | \ -- Aristotle / -------------------------- \ ^__^ \ (oo)\_______ (__)\ )\/\ ||----w | || || -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
