kworker thread issue - interrupt timer

[chapeaurouge]

Hello

Got a linux mint 12 (32bitS) on a t61p intel core2duo, 6 gb ram, ssd. Issue arises with stock kernel and 3.2.0-12-generic-pae.

I got loads of timer interrupts, which even make my mouse moves not to be smooth anymore. sys cpu time up to 30-40%. Here is a snap of procinfo.

irq 0: 6669890 timer irq 21: 0 uhci_hcd:usb4
irq 1: 7678 i8042 irq 22: 114714 ehci_hcd:usb1

Reasearch led me to think that this is an autosuspend kworker thread.

I have tried to:
- disable USB in BIOS altogether -> still there?!?!
- for i in /sys/bus/usb/devices/*/power/autosuspend; do echo 0 > $i; done
- echo on into power/control to deactive autosuspend
- echo -1 /sys/module/usbcore/parameters/autosuspend

Nothing helps.

http://ironman.darthgibus.net/?p=157

Any ideas?

Thanks, fred

[llvasconcellos]

Hi, I'm having this exactly same problem. I'm using Debian Edition and mouse keeps stopping from five to five seconds. And System monitor graphic shows a peak at the same time in one of the processors. How did you solve this problem?
Thanks,

Leonardo

[daku]

Hi

I have the same problem in Mint 12 64bit (Lenovo T61). Switching from kernel 3.0.0-17-generic back to 3.0.0-12-generic fixes the problem for me.

I tried building kernel from 3.4-rc7 sources but that didn't solve the problem.