2.5.51 - Strange UP APIC / 8139too / USB issues

[Stephen Wille Padnos]

Hi all.

I have a system with an Abit AT7 motherboard:  VIA KT333, single Athlon, 
512M RAM, onboard RTL8139 network, USB, USB2, 1394.  *NO* onboard PS/2 
keyboard or mouse ports.
Other:  IDE HD, CD-RW, and DVD.  Radeon 8500DV (will try getting that 
working later :)

I have used the system successfully with 2.4, and have been trying to 
get 2.5 to work.  Until now, I haven't been able to get the USB keyboard 
to work.  It is initialized by the BIOS, and is usable by GRUB for 
selecting boot images.

I finally found the culprit - "Local APIC Support on Uniprocessors" and 
"IO-APIC on uniprocessors".  If both items are enabled, the network 
functions, but USB doesn't work.  If not both are enabled (neither, or 
Local APIC but not IO-APIC), then the USB system works, but the network 
doesn't.  :(

I am not using modules.

these are the only differences in .config:

multimedia linux-2.5.51 # diff -u working_network 
working_usbkeyboard_config3
--- working_network     2002-12-11 15:43:31.000000000 -0500
+++ working_usbkeyboard_config3 2002-12-11 15:15:53.000000000 -0500
@@ -63,9 +63,8 @@
 # CONFIG_SMP is not set
 # CONFIG_PREEMPT is not set
 CONFIG_X86_UP_APIC=y
-CONFIG_X86_UP_IOAPIC=y
+# CONFIG_X86_UP_IOAPIC is not set
 CONFIG_X86_LOCAL_APIC=y
-CONFIG_X86_IO_APIC=y
 CONFIG_X86_MCE=y
 CONFIG_X86_MCE_NONFATAL=y
 # CONFIG_X86_MCE_P4THERMAL is not set

I can send complete configs, lspci / lsusb / whatever else anyone wants.

Thanks
- Steve