[Bug 187128] Re: Change /etc/init.d/hwclock.sh to enable RTC alarm in BIOS

[Thomas Hotz]

** Changed in: util-linux (Ubuntu)
       Status: New => Incomplete

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to util-linux in Ubuntu.
https://bugs.launchpad.net/bugs/187128

Title:
  Change /etc/init.d/hwclock.sh to enable RTC alarm in BIOS

Status in “util-linux” package in Ubuntu:
  Incomplete

Bug description:
  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

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/187128/+subscriptions