Re: new laptop woes

From: Martin Knoblauch
Date: Thu May 13 2004 - 07:57:11 EST

>Linux enables the Local APIC even on uni-processors systems so that it
>can use the LOCal APIC timer. This policy causes a significant
>population of laptops to freeze when booted with ACPI enabled.
>Curiously, we've seen this failure go away on some laptops after a
>upgrade -- so you shoul verify that you're running the latest BIOS for
>your system.
>Perhaps you could try the test patch here
>and add a comment to the bug report on if it makes any difference or


just to confirm that the mentioned patch fixes my boot hang (HP
Omnibook 6100, newest BIOS) with kernel-2.6.6. With acpi enabled it
needed "nolacpi" to come up. It would always just stop after the lines:

ACPI: Subsystem revision 20040326
ACPI: IRQ9 SCI: Edge set to Level Trigger.
ACPI-0179: *** Warning: The ACPI AML in your computer contains
errors, please nag the manufacturer to correct it.
ACPI-0182: *** Warning: Allowing relaxed access to fields; turn on
CONFIG_ACPI_DEBUG for details.

Apparently the SuSE supplied 2.6.4-54.3 has that (or a similar) fix in
it, as the notebook boots fine with that.

Only remaining problem now is that I have the "gut feeling" that I am
missing some mouse events with acpi enabled. That maybe XFree related.


Martin Knoblauch
email: k n o b i AT knobisoft DOT de
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