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

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    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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