After upgrading from mm-sources-2.6.4-r1 to mm-sources-2.6.4-r2 (and later) i registered that when i close the lid of my laptop (Dell inspiron 2650) the process events/0 uses all cpu power. I went on to check /proc/interupts - after upgrading i get about 8000-10000 interupts/sec with the lid closed. Reproducible: Always Steps to Reproduce: 1. Boot mm-sources-2.6.4-r2 or greater 2. close lid 3. watch /proc/interrupts Actual Results: A _lot_ of interupts, and cpu running at full power Expected Results: Well - nothing at all - I guess Kind of defeats the purpose of closing the lid to save power ;-)
What version of ACPI is that kernel using? Check in dmesg. It'll give a date starting 2004... you probably need to upgrade the ACPI version in the kernel. Or most likely since it's Dell laptop... download the latest BIOS since Dell only recently began properly supporting ACPI in their BIOS. CC'ing kernel@gentoo.org because it's really a kernel issue and not much of a mobile issue.
We (gentoo) does not support the -mm tree, sorry. You'll have to go to bugzilla.kernel.org to file bugs about this kernel tree, or post the issue to the linux-kernel mailing list.
