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? -- Aaron Konstam tel: (210) 656-0355 akonstam@xxxxxxxxxxxxx