Possible. Another thing to check is if you started using an APM
monitoring program, like the GNOME battery_applet which reads /proc/apm
every couple of seconds. With every read of /proc/apm the APM driver
calls the APM BIOS, which on some systems runs quite long with
interrupts disabled. On my laptop this results in exactly the noise you
described.
Erik
-- J.A.K. (Erik) Mouw, Information and Communication Theory Group, Department of Electrical Engineering, Faculty of Information Technology and Systems, Delft University of Technology, PO BOX 5031, 2600 GA Delft, The Netherlands Phone: +31-15-2783635 Fax: +31-15-2781843 Email: J.A.K.Mouw@its.tudelft.nl WWW: http://www-ict.its.tudelft.nl/~erik/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/