On 12/12/06, Jan Hackel <[EMAIL PROTECTED]> wrote: > Hi, Hello,
> since kernel 2.6.19 I get a high frequent whistling noise from the left part > of my Macbook Pro (near the AC plug). The noise seem to be related to > frequency management, since it gets *worse* when I throttle the CPU frequency > down (e.g. by governor "ondemand"). > > It is not there with kernel 2.6.18! And none of my reconfiguration attempts > could mend it for the 2.6.19er. > > I somehow suspect the hard disk to be the source of the noise, though I am not > sure. > > Can someone acknowledge this problem, or mend it? I confirm the problem. Same thing on my Mac Book Pro. It is not related to the hard drive but to the new timer infrastructure inside the kernel (I guess). I guess it is the same problem reported by some Mac OS X users. When the system is idle the CPU is set in low power until something wake it. This happen at a low enough frequency to have effect at an audible sound frequency. You can avoid the noise by running something like "yes > /dev/null" for example. Bye, -- Dr. Ludovic Rousseau ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Mactel-linux-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/mactel-linux-users
