| |||||||||||||
Idling ACPI idleIdling ACPI idlePosted Jun 3, 2010 7:20 UTC (Thu) by ringerc (subscriber, #3071)Parent article: Idling ACPI idle
Aaah, so that's why my XPS M1330 resumed using the C4 state (and therefore making a godawful screeching noise) when I upgraded to Ubuntu 10.4!
The old mechanism for limiting cpu states is gone, too, and it took some work to find out that now you can only do it at boot time on the kernel command line:
http://soapyfrogs.blogspot.com/2010/05/core-2-duo-cpu-whi...
Sometimes BIOS makes have a reason to disable power states. It may not be a GOOD reason ("our hardware is so crappy we have to turn features off to make it work without driving the user insane with squealing noises") but the user may still want to respect the BIOS tables. Admittedly, it's pretty rare for BIOS writers to get this sort of thing right, and this is a bit of a special case.
(Log in to post comments)
|
|||||||||||||