The real problem is that you want a one-shot that doesn't require any problematic storage.
Can GRUB use the realtime hardware clock? If so, you could create a time-controlled command that boots one entry if before a time threshold and another after that threshold. Maybe call it "until". _______________________________________________ Bug-grub mailing list [EMAIL PROTECTED] http://mail.gnu.org/mailman/listinfo/bug-grub
