> > I suspect acpi might be the culprit but I cannot try to > > disable it because on this particular laptop you need acpi to > > make sound work (probably something to do with routing of > > interrupts,, also tried pci=biosirq on a non-acpi kernel > > without success). Any suggestions? > > Hmmh, are you confusing ACPI and APIC here? > > ACPI is about power saving and APIC is about routing interrupts, etc...
I'm talking about the power saving subsystem. A kernel without the latest sourceforge acpi patch boots, but the routing of interrupts (and maybe something else?) is broken and sound does not work at all. With the acpi patch sound works fine, except for the 170mSec spikes I see when running latencytest. Obviously I cannot remove acpi to see if that is actually the problem :-) > > Proc: something has changed from the 2.4.18 to the 2.4.19 > > kernels (maybe the acpi proc interface is to blame?). Big > > mess of latency spikes in the proc latency test. > > No problems here with 2.4.19-jl series... Steady at 0.9 ms when using 128 > byte buffers with ENS1371. Sigh... :-) -- Fernando
