https://bugzilla.kernel.org/show_bug.cgi?id=201597
Bug ID: 201597
Summary: Hardcoded 1200ms delay in AML for Lenovo Yoga 920
Product: ACPI
Version: 2.5
Kernel Version: 4.19.0
Hardware: Intel
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: BIOS
Assignee: [email protected]
Reporter: [email protected]
Regression: No
Created attachment 279295
--> https://bugzilla.kernel.org/attachment.cgi?id=279295&action=edit
S3 mem timeline from sleepgraph
The Lenovo Yoga 920 has a hardcoded delay in its BIOS which shows up in linux
suspend/resume. There's a 1200ms delay in the AML for the i2c-WCOM5113:00
device (i2c_hid module). It happens in both suspend_late and resume_early. This
effectively makes suspend last 2.4 seconds longer than it has to when running
linux.
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