I am still
unable to run Jack at anything less than 1024 without having
Xrun hell. I set the HD to DMA "on" I had apm as opposed to acpi
running...turned it off and found no difference.
Check that your CPU speed is not getting screwed up by the power
management (i.e. you have the full 650 MHz). I don't know if it's
even a problem for Dell laptops, but it was/is for certain Thinkpads.
How do you check the speed? Do you mean the settings in the BIOS?
Because I also have a Thinkpad...
Thanks,
--rossen