https://bugzilla.kernel.org/show_bug.cgi?id=200611
Bug ID: 200611
Summary: System may get unresponsive after resume from
suspend-to-RAM
Product: ACPI
Version: 2.5
Kernel Version: 4.18-rc4
Hardware: All
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: EC
Assignee: [email protected]
Reporter: [email protected]
Regression: No
Created attachment 277437
--> https://bugzilla.kernel.org/attachment.cgi?id=277437&action=edit
Dmesg on 4.16-rc1+3cd09 (freeze after resume)
When resuming from RAM, the laptop screen is black, with only the mouse cursor
visible. Switching to a virtual console and back brings up the unlocking
screen. However, on maybe one third of resumes, the system eventually (after
1–10 seconds) becomes unresponsive, close to the point of being frozen (only
the mouse cursor moves).
Dmesg logs featuring successful and unsuccessful resumes are attached.
Bisecting shows that this behavior was introduced in
3cd091a773936c54344a519f7ee1379ccb620bee (“ACPI / EC: Restore polling during
noirq suspend/resume phases”, which was in response to bug 197863). Thus
4.16-rc1 was the last non-freezing mainline version, and the behavior is still
present in 4.18-rc4.
Hardware: Dell Latitude E7450 laptop (Intel i7-5600U processor with HD Graphics
5500 IGP), attached via DP to an external screen.
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