https://bugzilla.kernel.org/show_bug.cgi?id=61051
Bug ID: 61051
Summary: Kernel threads use significant amount of CPU (Lenovo
Ideapad y560p)
Product: ACPI
Version: 2.5
Kernel Version: 2.6.38
Hardware: x86-64
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Config-Interrupts
Assignee: [email protected]
Reporter: [email protected]
Regression: No
Created attachment 107721
--> https://bugzilla.kernel.org/attachment.cgi?id=107721&action=edit
acpidump output
>From Debian bug 655944 (http://bugs.debian.org/655944)):
I found (after testing different kernels in debian snapshots between 2.6.32 and
3.* - I currently run 3.10) that for kernels 2.6.38 and above, kernel threads
used significantly more CPU that normal on my laptop. Digging though logfiles
lead me to find that /sys/firmware/acpi/interrupts/gpe18 was rising at about
100000 a second (on version 3.1, where I first found the issue).
The other noticeable difference (I don't know if this is important), is that
the resolution cannot be set properly for versions 2.6.37 and lower.
I'm able to some testing on the machine (I'm familiar with the unix CLI and
some of the dev tools, but I haven't built my own kernel and I'm not that great
with git).
Thanks
James
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