[Bug 1806838] Re: Workaround CSS timeout on AMD SNPS 3.0 xHC

This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
bionic' to 'verification-done-bionic'. If the problem still exists,
change the tag 'verification-needed-bionic' to 'verification-failed-
bionic'.

If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: verification-needed-bionic

--
You received this bug notification because you are subscribed to linux
in Ubuntu.
Matching subscriptions: Bgg, Bmail, Nb
https://bugs.launchpad.net/bugs/1806838

Title:
Workaround CSS timeout on AMD SNPS 3.0 xHC

Status in HWE Next:
New
Status in linux package in Ubuntu:
Fix Committed
Status in linux-oem package in Ubuntu:
New
Status in linux source package in Bionic:
Fix Committed
Status in linux-oem source package in Bionic:
New
Status in linux source package in Cosmic:
Fix Committed
Status in linux-oem source package in Cosmic:
New
Status in linux source package in Disco:
Fix Committed
Status in linux-oem source package in Disco:
New

Bug description:
[Impact]
Raven Ridge xHC may fail to suspend, causes the USB stops working, and blocks the system entering system-wide suspend.

[Fix]
It's a hardware/firmware bug, workarounded by bailing out suspend function if it ever fails, and reset the xHC in next resume function.

[Test]
After applying the patch, the USB works, and the system can enter S3 consecutively.

[Regression Potential]
Minimal. This workaround only applies to AMD Raven Ridge xHC.

To manage notifications about this bug go to:
https://bugs.launchpad.net/hwe-next/+bug/1806838/+subscriptions