2.5.51 - Strange UP APIC / 8139too / USB issues

2.5.51 - Strange UP APIC / 8139too / USB issues

Post by Stephen Wille Padno » Thu, 12 Dec 2002 23:10:04



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

 # 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

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2.5.51 - Strange UP APIC / 8139too / USB issues

Post by Stephen Wille Padno » Fri, 13 Dec 2002 07:10:05


Correction:

The problem is actually ACPI.  With ACPI disabled, both USB and network
function correctly with local APIC + IO-APIC enabled or disabled.

Sorry for the red herring.

- Steve

[snip]

Quote:> 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.  :(

[snip]

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