Hi, I am running RHELv5 (x86_64)on a dual-xeon Dell 1950. DomU is 32-bit Fedora Core 6, running fully virtualized. System time as reported by ''date'' jumps back and forth, sometimes by a few seconds, sometimes a few minutes. I have noticed a couple strange things: ''hwclock'' hangs until finally reporting, [root@guest ~]# hwclock select() to /dev/rtc to wait for clock tick timed out Also, very often running applications, yum for example, will hang for long periods of time - strace shows the hang at a nanosleep() call. Running ''sleep 2'' will produce wildly differing results. Rebooting the guest OS will help for a while, then the instabillity returns over the next couple of hours. Um, I don''t even know where to go with this. I can reproduce this stuff whether running ntpd or not (ntpd should be ok on a fully virtualized host right?) Dom0 is running ntp. Any help would be greatly appreciated. Thanks. Uname info: Linux host 2.6.18-8.1.1.el5xen #1 SMP Mon Feb 26 20:51:53 EST 2007 x86_64 x86_64 x86_64 GNU/Linux Linux guest 2.6.20-1.2944.fc6 #1 SMP Tue Apr 10 18:46:45 EDT 2007 i686 unknown -- View this message in context: http://www.nabble.com/Clock-problem-with-FC6-full-virt-guest-dom-tf3596661.html#a10045382 Sent from the Xen - User mailing list archive at Nabble.com. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users