ACPI, Asus P4C800 Deluxe

[David McKenna]

Using eCS 2.0 rc2 with ACPI 3.02 (debug), APM 1.17 and DaniS506 1.8.1.

Motherboard is an Asus P4C800 Deluxe containing a 3GHz P4 CPU, Intel 875P chipset, ATI Radeon 9600 AGP video, 3COM gigabit NIC, ICH5/AD 1985 audio (see pci.log).

With w4 kernal everything works good. With smp kernal and no switches or /SMP switch everything also works good. Problems occur when /APIC switch is added.

With CPU set to no hyperthreading (and /SMP /APIC) the computer hangs during boot after all devices are loaded (see file Acpi-Hang-NoHyp.jpg). I need to do a hard reset.

With CPU set with hyperthreading, /SMP /APIC boots and IRQ's are loaded high (see acpi-apic-hyp.log). The only problem is every 3rd boot or so, the CPU meter shows both are at 100% and IRQ load is ~20% and the computer runs very slow (see acpi-apic-hyp-slow.log). The floppy drive light also remains on all the time.

[David McKenna]

I also have tried setting all the low IRQ's to 'Reserved' (or legacy) in the BIOS as well as tried the /ALS and /CD switches... all to no effect.

[Pasha]

Your problem with "slow" - in SNAP. In APIC for 1 kernel too. SNAP has very strange work in SMP kernel

[David McKenna]

OK... I am now using Panorama. When hyperthreading is ON and /SMP /APIC is used, it seems to work stable! So far no slowdown - it seems very fast.

But... with hyperthreading OFF and /SMP /APIC it hangs in the same place as before - after drivers are loaded with the same screen as before.