Hi Brian On Fri, Apr 22, 2005 at 11:07:01AM -0400, Brian Sammon wrote: > I'm running Debian Sarge/powerpc with a kernel I compiled myself. I keep the > hardware clock in UTC. > For the first few weeks of using this setup, every time I started up the > computer, Linux would have the wrong time, and I would have to manually > correct the clock. > It took me about an hour of investigation to figure out what the problem was. > > As far as I can tell, the standard clock management system in Debian is for > /etc/init.d/hwclockfirst.sh and /etc/init.d/hwclock.sh to run on startup and > shutdown to sync the system clock and the hardware clock. Both of these > scripts use the hwclock application, which doesn't work on my system unless I > install the genrtc module.
AFAIK the whole time setting routine on Debian is, to put it friendly, a mess. Some hwclock theory, that hopefully helped me understand the problem: <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=263116> <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=171281> <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=97349> Following are some notes on the solution I found: (I just paste it away from my notes to here, slightly changed: Please don't take the following literally, instead check it carefully; the following seems to work here, but I can't guarantee it will on your system: And if you found a mistake please let me know): ################################################ Calibrating time: First time: Run this script: ----------------------------- #!/bin/sh -x # # This is time-recover.sh # # ls -l /etc/adjtime && \ cp -iv /etc/adjtime /etc/adjtime-`date +%y-%m-%d-%H%M` && \ rm -rf /etc/adjtime && \ ntpdate -s -u -v [here some time server address*] && \ hwclock --utc --systohc && \ hwclock --show && \ depmod --quick ----------------------------- Second time, a few days later: Run this script: ------------------------- #!/bin/sh -x # # This is tuneclock.sh # # Setting the time: # First the system time, diverting output to /var/log/messages. # Then setting the HWclock to the new system time. ls -l /etc/adjtime && \ cp -iv /etc/adjtime /etc/adjtime.`date +%y-%m-%d-%H%M` && \ ntpdate -s -u -v [here some time server address*] && \ hwclock --debug --systohc --utc && \ depmod --quick ------------------------- and *after* that make sure you have this line hwclock --adjust $GMT $BADYEAR uncommented in /etc/init.d/hwclock.sh, i.e with no '#' at the beginning of the line. This makes sure next time you boot, your time gets set according to the drift rate calculated by hwclock when running the tuneclock.sh script. [*= please see <http://ntp.isc.org/bin/view/Servers/WebHome> for more on that ..] Note: I'm not sure a "depmod --quick" is really needed in the scripts above ... Please correct that appropriately if necessary ... Note 1: Please note 'rm -rf' above ... :) ############################################################## > I'm considering submitting a bug report/feature request for util-linux saying > that there should be documentation in /usr/share/doc/util-linux/ saying that > Debian requires the RTC driver on powerpc in order for the clock to work as > expected. I definitely do not know whether /dev/rtc is needed or not for a proper functioning of hwclock on Debian. Please see 'man hwclock' for more (and search for /dev/rtc on that page). But I have it enabled on 2.6.10: $ grep -i rtc /boot/config-2.6.10-powerpc CONFIG_GEN_RTC=y CONFIG_GEN_RTC_X=y CONFIG_SENSORS_RTC8564=m And I have this line in /etc/default/rcS UTC=yes see: <http://www.debian.org/doc/manuals/reference/ch-tips.en.html#s8.6.3> HTH Best Regards Wolfgang -- Wolfgang Pfeiffer http://profiles.yahoo.com/wolfgangpfeiffer -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
