[ltp] CPU Idle and whine

[linux-thinkpad@linux-thinkpad.org]

on Feb 5, 2006, 20:13, Richard Neill wrote:

> I noticed that there is a faint(*) whine audible through the speakers of the 
> Thinkpad. It only occurs when the system is idle, so I think it is caused by 
> the CPU idle state [kernel 2.6,ACPI].


ThinkWiki has some insights.

[ ... ]


> Is there a better solution?


ThinkWiki has some insights. A few things worth considering:

1) Setting cstate to C3 or C2. It's bad because the power is drained.
2) Unloading uhci_hcd (if you don't need USB devices)
3) Undervolting





ivr
-- 
The only "intuitive" interface is the nipple. After that, it's all learned.
(Bruce Ediger, bediger@teal.csn.org, in comp.os.linux.misc, on X interfaces.)