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    SubjectRe: [PATCH] Disable i8042 checks on Intel Apple Macs
    On 01/25/2010 08:34 AM, Vojtech Pavlik wrote:
    > Thus I believe that the right fix here is to figure out why the accesses
    > to the ports 0x60/0x64 take a long time or forever on a Mac. Is it just
    > that the kernel is timing out waiting for the i8042? Or is it something
    > more sinister?

    In the A20 code in the setup code, I look for 0xFF coming back and
    terminate the "wait for ready" loop much sooner than for other values.
    0xFF is a *possible* status value, but not a very *likely* one
    (especially for repeated reads), as it would represent:

    parity error + receive timeout + transmit timeout + keyboard lock +
    command + selftest OK + input full + output full.


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      Last update: 2010-01-25 22:35    [W:0.019 / U:1.228 seconds]
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