Workaround CSS timeout on AMD SNPS 3.0 xHC

Bug #1806838 reported by Kai-Heng Feng on 2018-12-05
10
This bug affects 1 person
Affects Status Importance Assigned to Milestone
HWE Next
Undecided
Unassigned
linux (Ubuntu)
Status tracked in Disco
Bionic
Undecided
Unassigned
Cosmic
Undecided
Unassigned
Disco
Undecided
Unassigned
linux-oem (Ubuntu)
Status tracked in Disco
Bionic
Undecided
Unassigned
Cosmic
Undecided
Unassigned
Disco
Undecided
Unassigned

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.

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1806838

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

Changed in linux (Ubuntu):
status: New → Incomplete
AceLan Kao (acelankao) on 2018-12-05
tags: added: originate-from-1790597 somerville
Seth Forshee (sforshee) on 2018-12-05
Changed in linux (Ubuntu Disco):
status: Incomplete → Fix Committed
Changed in linux (Ubuntu Bionic):
status: New → Fix Committed
Changed in linux (Ubuntu Cosmic):
status: New → Fix Committed
Brad Figg (brad-figg) wrote :

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
Kai-Heng Feng (kaihengfeng) wrote :

xHC now recovers after suspend failed.

tags: added: verification-done-bionic
removed: verification-needed-bionic
To post a comment you must log in.
This report contains Public information  Edit
Everyone can see this information.

Other bug subscribers