I've seen this in FC6 and tracked it down to some old posts that
basically say that xen does not (fully) support power saving features.
From what I understand, the system clock is based on counting CPU
cycles (when the computer is running, of course) - and frequency scaling
changes the frequency, thereby making it harder to keep the clock in
sync. With xen, there is more than one OS running on the CPU - and
keeping it all in sync becomes really hard.
Not sure why it won't power off after shutdown, though...
Aaron Konstam wrote:
The difference between the behavior of the xen and non-xen kernel in F7
on my laptop is puzzling. In grub.conf I have the lines:
title Fedora (2.6.20-2925.11.fc7xen)
root (hd0,2)
kernel /boot/xen.gz-2.6.20-2925.11.fc7
module /boot/vmlinuz-2.6.20-2925.11.fc7xen ro root=LABEL=/ rhgb
quiet
module /boot/initrd-2.6.20-2925.11.fc7xen.img
Booting this kernel indicates that cpu scaling is not supported and the
machine does not shut off when I do a shut down.
The lines for the non-xen kernel:
title Fedora (2.6.21-1.3228.fc7)
root (hd0,2)
kernel /boot/vmlinuz-2.6.21-1.3228.fc7 ro root=LABEL=/ rhgb
quiet
initrd /boot/initrd-2.6.21-1.3228.fc7.img
when booted does support cpu scaling and dose shut off when I do a shut
down.
Any explanations of this difference? Please don't laugh since I have
been telling people how to get their machines to shut off and I have
been hosted on my own petard.
By the way what is the significance of the extra lines in the grub
clause for the xen kernel?
