Re: I/O APIC fixed in 2.4.19-pre3 & 2.5.6 (was Re: Linux 2.4.19-pre3)

[PlasmaJohn]

> Any chance this will cure the lockups on a Dell Latitude C600 every time
> you exit X? I've disabled both the IO-APIC and APIC-uni, which was
> supposed to fix the problem but didn't. Dare I hope that the disable
> wasn't enough?

Does it also lock up when the text console blanks?

The X lockups were what had been plaguing me for the past two weeks.  
I thought it was the new Radeon (7500), but it seems[1] to have been my 
Asus CUSL2-C's[2] broken APM implementation (Quite recently Alan Cox 
mentioned this problem with Asus' BIOS).

Out of fear, I do not compile in ACPI[3].

I have since recompiled with APM as a module and life seems much more
stable.  (I issue "modprobe apm" at shutdown so the box actually turns 
off :)

Perhaps your BIOS has similar "issues"?

John Klar

[1] No lockup in 3 days.  Knock bits.

[2] Intel 815ep, 700MHz Coppermine PIII not overclocked.
    RH6.2 frankensteined to 7.2 (mostly)
    kernel 2.4.15 (with Viro's inode patch) (yes, yes, I'm slow)
    (RH's gcc-2.96-98)
    XFree86 4.2.0 from their binary tarballs.

[3] One of the side-effects of ACPI support is disabling APM if
    an ACPI capable board is found.  This, I suspect, is why reports
    of CUSL2 hangs are rare...