Hello All, I have a problem with hwclock on centos 5.3. in xen guest environment.

# hwclock --debug
hwclock from util-linux-2.13-pre7
hwclock: Open of /dev/rtc failed, errno=19: No such device.
No usable clock interface found.
Cannot access the Hardware Clock via any known method.

So, I'm afraid that I can not change my time by ntp.

In CentOS mailing list I found a thread "hwclock and util-linux on 5.3", but there is still no answer and discussion stopped. Maybe someone knows the solution of this problem.