https://bugzilla.kernel.org/show_bug.cgi?id=202523
Bug ID: 202523
Summary: Extremely long acpi_s2idle_prepare &
acpi_s2idle_restore on Dell 9370 freeze
Product: ACPI
Version: 2.5
Kernel Version: 5.0.0-rc4
Hardware: Intel
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: BIOS
Assignee: [email protected]
Reporter: [email protected]
Regression: No
Created attachment 281039
--> https://bugzilla.kernel.org/attachment.cgi?id=281039&action=edit
dell-9370_freeze-acpi_s2idle_prepare.html
We run a 24+ hour S2idle (freeze) stress test on various machines in our lab,
and discovered some odd behavior on this machine:
Dell Inc. XPS 13 9370 with Intel(R) Core(TM) i5-8250U CPU @ 1.60GHz
The acpi_s2idle_prepare and acpi_s2idle_restore functions take a few
milliseconds in most of the test runs, but rarely they take an extreme amount
of time:
Instance #1 (happens 1/3160 times): acpi_s2idle_prepare takes 45 seconds and
causes the freeze to abort in suspend_noirq:
(see attachments) dell-9370_freeze-acpi_s2idle_prepare.html
Instance #2 (happens 1/3160 times): acpi_s2idle_restore takes 45 seconds and
but eventually the reeeze resume completed:
(see attachments) dell-9370_freeze-acpi_s2idle_restore.html
Both times the code is stuck in acpi_ps_parse_aml for the entire function call,
this something is happening in BIOS.
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