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[Bug 743101] New: kworker thread jumps to 100% when laptop is redocked
  • From: bugzilla_noreply@xxxxxxxxxx
  • Date: Tue, 24 Jan 2012 12:49:26 +0000
  • Message-id: <bug-743101-21960@http.bugzilla.novell.com/>

https://bugzilla.novell.com/show_bug.cgi?id=743101

https://bugzilla.novell.com/show_bug.cgi?id=743101#c0


Summary: kworker thread jumps to 100% when laptop is redocked
Classification: openSUSE
Product: openSUSE 12.1
Version: Final
Platform: x86-64
OS/Version: Other
Status: NEW
Severity: Normal
Priority: P5 - None
Component: Kernel
AssignedTo: kernel-maintainers@xxxxxxxxxxxxxxxxxxxxxx
ReportedBy: aspiers@xxxxxxxx
QAContact: qa@xxxxxxx
Found By: Development
Blocker: ---


I am running fully patched openSUSE 12.1 x86_64. Every time I put my Dell
Latitude D630 back in the docking station, the kworker kernel thread jumps to
100% CPU (i.e. one of the two cores) and stays there until reboot.
/var/log/messages fills up with these errors:

Jan 24 12:09:37 southern kernel: [254699.227808] ACPI Error: Method
parse/execution failed [\SMI_] (Node ffff88007b772a88), AE_AML_INFINITE_LOOP
(20110623/psparse-536)
Jan 24 12:09:37 southern kernel: [254699.227821] ACPI Error: Method
parse/execution failed [\DCKE] (Node ffff88007b778a60), AE_AML_INFINITE_LOOP
(20110623/psparse-536)
Jan 24 12:09:37 southern kernel: [254699.227828] ACPI Error: Method
parse/execution failed [\NEVT] (Node ffff88007b772da8), AE_AML_INFINITE_LOOP
(20110623/psparse-536)
Jan 24 12:09:37 southern kernel: [254699.227835] ACPI Error: Method
parse/execution failed [\_GPE._L1C] (Node ffff88007b778920),
AE_AML_INFINITE_LOOP (20110623/psparse-536)
Jan 24 12:09:37 southern kernel: [254699.227846] ACPI Exception:
AE_AML_INFINITE_LOOP, while evaluating GPE method [_L1C] (20110623/evgpe-560)

This is similar to bug 689848 and bug 714455, but it must be different because
it is only triggered by a redock, and also I am running the 3.1.0-1.2-desktop
kernel, which is quite a lot newer.

Happy to provide further debug if required - problem is 100% reproducible.

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