https://bugzilla.kernel.org/show_bug.cgi?id=101861
Bug ID: 101861
Summary: kworker/0:2 uses 75 % of CPU core after USB Speakers
are attached and USB3 is enabled
Product: ACPI
Version: 2.5
Kernel Version: kernel-4.1.3-200.fc22.x86_64
Hardware: All
OS: Linux
Tree: Fedora
Status: NEW
Severity: normal
Priority: P1
Component: BIOS
Assignee: acpi_b...@kernel-bugs.osdl.org
Reporter: michal.no...@resist.ca
Regression: No
I run kernel-4.1.3-200.fc22.x86_64 on Toshiba Satellite L855 notebook with
latest BIOS. When USB Speakers are attached kworker pops up and indefinitely
uses one CPU on 75 %, indefinitely. It happens only when USB3 is enabled in
BIOS, USB2 is OK.
USB Speaker: Logitech S-150 (lsusb claims it to be: Tenx Technology, Inc.).
If /sys/firmware/acpi/interrupts/gpe0D is disabled by
echo disable > /sys/firmware/acpi/interrupts/gpe0D
kworker disappears, if enabled pops up again.
Wrt, the logs: Jul 23 13:50:15 is the time I plugged the Speakers.
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