problem powering off ms4h

[duncan]

there is an issue with linux that certain intel computers will only restart rather than reboot - this makes it impossible to use the power off feature of ms4h to save power

the issue is relating to a bug in the usb3 driver and only shows up when you enable WOL

the fix requires either to disable usb3 contollers (no good for us with usb sound cards) or a moderate amount of linux ability to update the grub settings
unfortunately there is also an issue where the utility to update grub also doesnt work without a fix....

the reboot fix:
sudo editor /etc/default/grub, GRUB_CMDLINE_LINUX_DEFAULT="quiet splash xhci_hcd.quirks=270336"
then run sudo update-grub, reboot

if this doesnt work then try 8192 or 262144 instead of 270336

if update-grub doesnt work, its to do with su, sudo and path

issues and fix show in attached images

[duncan]

also another problem i found when trying to use WOL with Dell PCs:

if you enable WOL in the bios, it wont work until you disable deep sleep (in S5) also - deep sleep turns off the power to the lan interface so WOL cant work