Red Hat Bugzilla – Bug 447019
clock does not obey System clock uses UTC setting
Last modified: 2014-03-16 23:14:44 EDT
Description of problem:
IF the system BIOS uses local time instead of UTC (e.g. with a dual boot Windows
system) the clock is set to an incorrect time when Fedora boots.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Set system BIOS clock to local time instead of UTC.
2. Uncheck "System clock uses UTC" in system-config-date.
System clock is several hours off, depending on the timezone setting in
System clock should reflect the correct time.
Running "hwclock --hctosys" corrects the clock, as does re-running
system-config-date, but it is incorrect again at next boot.
This may be related to bug 443422.
What does your /etc/adjtime file look like?
Do you have any rtc devices in /sys/class/rtc?
error@roam ~/Desktop $ cat /etc/adjtime
-0.000794 1211654886 0.000000
error@roam ~/Desktop $ cat /sys/class/rtc/rtc0/device/id
Your configuration is wrong... the last line of /etc/adjtime needs to be UTC for
it to be treated as UTC. Is system-config-date not updating the file correctly?
My system BIOS clock is set to LOCAL time, not UTC. (One of the hazards of dual
booting Windows.) But the system seems to be assuming UTC when I start it up, as
the Linux system clock comes up four hours behind the correct time.
It seems that s-c-date isn't pertinent to this bug. In that case, I'll pass it back.
Sorry, I misread the subject.
What happens (once it's booted 'wrong') if you do 'echo "add" >
This is what happens:
error@roam ~ $ su -
Scan right index finger on UPEK TouchStrip
root@roam ~ # echo "add" > /sys/class/rtc/rtc0/uevent
root@roam ~ # echo $?
root@roam ~ # cat /sys/class/rtc/rtc0/uevent
root@roam ~ #
Though, I must admit, the system mysteriously is booting up with the correct
local time now, without having to manually correct the clock. Again, I have no
idea why, or what was wrong before, or why it works now. But, at least, it seems
to be working.
When it was failing, were you booting a significantly older kernel?
Yes, I was booting my backup kernel from Fedora 8 (126.96.36.199-64.fc8) while I was
trying to work out an unrelated F9 kernel problem.
Created attachment 307073 [details]
patch for this issue
Ah, the F8 kernel isn't using the RTC class device, so it's hitting the old
compat code in the udev rule... which is broken.
Try the attached with a Fedora 8 kernel.
*** Bug 438100 has been marked as a duplicate of this bug. ***
Bill, your patch 307073 seems to have fixed the problem; I booted up on
188.8.131.52-64.fc8 and the clock came up with the correct time. Thanks!
initscripts-8.76.3-1 has been submitted as an update for Fedora 9.
initscripts-8.76.3-1 has been pushed to the Fedora 9 testing repository. If problems still persist, please make note of it in this bug report.
If you want to test the update, you can install it with
su -c 'yum --enablerepo=updates-testing update initscripts'. You can provide feedback for this update here: http://admin.fedoraproject.org/updates/F9/FEDORA-2008-7667
initscripts-8.76.3-1 has been pushed to the Fedora 9 stable repository. If problems still persist, please make note of it in this bug report.
*** Bug 451175 has been marked as a duplicate of this bug. ***
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