** Changed in: hwe-next
Status: New => Fix Released
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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-oem-5.6 in Ubuntu.
https://bugs.launchpad.net/bugs/1908713
Title:
Fix suspend error of SOF driver
Status in HWE Next:
Fix Released
Status in linux-oem-5.6 package in Ubuntu:
Invalid
Status in linux-oem-5.6 source package in Focal:
Fix Released
Bug description:
[Impact]
SOF driver in oem-5.6 kernel tries to access HDA codec register when the
codec is already suspended. This may freeze suspend.
[Fix]
Revert HDA codec PM direct-complete optimization.
The same suspend optimization works perfectly on 5.8 and 5.10 kernel, so
something's wrong in the SOF driver in oem-5.6. However, SOF in oem-5.6
is in Frankenstein state so we better not touch it.
[Test]
Suspend a laptop with SOF driver, it can take 30 seconds to suspend, or
worse, it freezes.
With the patch applied, it can suspend in 1 second.
[Regression Risk]
For HDA codecs that benefit from this PM optimization, it'll take longer
to suspend and resume. Nothing else changes other than that.
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