Re: Problems with USB from late 2.3.x kernels and BP6 in MPS 1.4 mode

From: Harold Oga (ogah@cadvision.com)
Date: Sat Feb 12 2000 - 05:34:01 EST

On Sat, Feb 12, 2000 at 02:06:25AM -0700, Harold Oga wrote:
>On Fri, Feb 11, 2000 at 05:03:15PM -0500, Dunlap, Randy wrote:
>>The linux-usb project has had 2-3 reports of USB
>>not working on SMP systems if they are in MPS 1.4
>>mode (BIOS SETUP option). The latest report was
>>2000-Feb-4.
>>
>>After being changed to MPS 1.1 mode, USB works as expected.
>>
>>Does anyone here have any ideas about why this is
>>happening and what we can do about it?
>
>Hi,
> As a bit of followup to this, which I think I mentioned on
>the linux-usb mailing list, MPS 1.4 mode will work with
>kernel 2.3.42 if I pass noapic on the command line, so it
>seems to me to be related to the apic stuff. I'm in the
>process of narrowing down which 2.3.x kernel it stopped working
>with in MPS 1.4 mode, since I know for sure that 2.3.18 works.

Ok,
   It looks like it the problem with MPS 1.4 mode begins with 2.3.20.
Kernels before that work ok, as does 2.2.x.

-Harold 

-- 
"Life sucks, deal with it!"

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