Public bug reported:
I had a problem with RTC alarm in BIOS in Ubuntu 7.10 and 8.04 alpha3,
finally solved thanks to
http://www.mythtv.org/wiki/index.php/ACPI_Wakeup#Disable_hwclock_updates_.28FUSSY_BIOS.29
Quote:
Most linux distributions write the current system time back to the bios when
shutting down the machine. Some BIOSes refuse to wake up if the hardware clock
is modified after the alarm timer has been set. To avoid that the current
system time is written back to the hardware clock it required to change your
startup scripts.
...
Ubuntu & Debian
modifying /etc/init.d/hwclock.sh with the following will fix this
problem:
stop|restart|reload|force-reload)
==> ACPITIME=`cat /proc/acpi/alarm`
if [ "$HWCLOCKACCESS" != no ]
then
if [ "$VERBOSE" != no ]
then
echo "Saving the System Clock time to the Hardware
Clock..."
fi
[ "$GMT" = "-u" ] && GMT="--utc"
/sbin/hwclock --systohc $GMT $BADYEAR
if [ "$VERBOSE" != no ]
then
echo "Hardware Clock updated to `date`."
fi
==> echo "$ACPITIME" > /proc/acpi/alarm
** Affects: util-linux (Ubuntu)
Importance: Undecided
Status: New
--
Change /etc/init.d/hwclock.sh to enable RTC alarm in BIOS
https://bugs.launchpad.net/bugs/187128
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