The UP x86 kernel used for a while has been panic'ing on boot on my 2x3.4 ghz
em64t box. The x86_64 kernel (which is smp) boots fine.
Backtrace with 2.6.13-1.1624_FC5
kernel BUG at arch/i386/kernel/apic.c:430!
My other dual box (2x2.8 ghz p4 xen, compaq presario) boots fine.
This is on a HP xw8200. Booting with 'linux apic' gets further, but then just
hangs after probing the IDE devices.
Could you try 'linux lapic apic' to enable the local APIC and IO APIC on the
xw8200? My x445 throws up "hda: Interrupt timeout" messages if I only enable
the IOAPICs but it boots fine if both are passed.
Also, I've submitted a patch (see RH 167333) that should keep the local APIC off
except when expressly asked for with 'lapic'. Hopefully this problem you're
seeing will go away when that patch goes into rawhide.
That does make things work... adding bug dep
that patch has been in rawhide for a few days now. Does the latest tree work ?
Works with today's rawhide at least