Hello,
- I have downloaded fedora 8, burned this on a disk and used the disk
to install on a desktop. No problem. I took the same disk to my Asus (dual boot with Windows XP) and started up from the disk and chose the option "upgrade an existing system". the system began collecting installed packages end thereafter checking dependencies. about 40% through this the system hangs completely (no mouse action either) and only using the on/off button of the laptop gives any result.
maybe you should see Redhat Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=372011
but in F8 there is also an issue with dual-head on ATI cards. See: https://bugzilla.redhat.com/show_bug.cgi?id=374901
Kai.