Broken APIC on my laptop or bug in FreeBSD?

[Giorgos Keramidas]

On Sat, 19 Jul 2008 17:03:08 -0400, "Alexandre \"Sunny\" Kovalenko" <gaijin.k at gmail.com> wrote:
> On Thu, 2008-07-17 at 21:20 +0300, Giorgos Keramidas wrote:
>> After booting with the APIC enabled, I found out that:
>>
>>   * In single user mode, after `boot -sv', I can keep working without
>>     any major slow down.
>>
>>   * When I exit single user mode, and a few of the rc.d startup scripts
>>     run, the laptop becomes progressively slower, and eventually crawls
>>     to an unusable state.  I can almost complete logging in as `root' in
>>     ttyv0 but only if I keep furiously moving the mouse around.  If I
>>     don't move the mouse at all, the typed characters may never actually
>>     appear on ttyv0.
>
> Are you by any chance using cx_lowest="C3" (or "LOW") in your rc.conf? I
> have seen these symptoms (including mouse inducement of the typed
> characters) when cpu0 on my laptop went to C3. Nowadays I have C3 on
> cpu1 and C2 on cpu0 and life is good. Then again, I am running RELENG_7
> (which AFAICR was 7-CURRENT at the time), so YMMV.

Ah, good point.  I have indeed performance_cx_lowest="LOW" in rc.conf.

I'll remove that and try again with the APIC enabled...