https://bugzilla.kernel.org/show_bug.cgi?id=198169
Bug ID: 198169
Summary: Excessive GPE07 interrupts after plugging in power on
MacBook Pro
Product: ACPI
Version: 2.5
Kernel Version: 4.14 (and earlier, at least back to 4.9)
Hardware: Intel
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: EC
Assignee: [email protected]
Reporter: [email protected]
Regression: No
Created attachment 261185
--> https://bugzilla.kernel.org/attachment.cgi?id=261185&action=edit
dmesg output; enabled dynamic debug for ec.c after boot but before plugging in
power; truncated after 1 second worth of debug output
System is a MacBookPro13,3, though I believe the issue occurs on all other
MacBookPro13,* and MacBookPro14,* . If I boot without the power supply plugged
in, then running 'watch cat /sys/firmware/acpi/interrupts/gpe07' shows no
activity; but as soon as I plug in the power the interrupt count starts to
increase by about 5000/second. If I boot with the power supply plugged in, then
I see this large number of interrupts as soon as I'm able to log in.
When this happens, the CPU starts spending about 20% in interrupts, and it
leads to other issues such as unloading modules taking very long (1 minute)
(the longer this has been going on, the longer the module unload takes).
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