[Bug 1900847] Re: Fix non-working Intel NVMe after S3

** Changed in: linux (Ubuntu Focal)
Status: Confirmed => Fix Committed

--
You received this bug notification because you are subscribed to linux
in Ubuntu.
Matching subscriptions: Bgg, Bmail, Nb
https://bugs.launchpad.net/bugs/1900847

Title:
Fix non-working Intel NVMe after S3

Status in HWE Next:
New
Status in linux package in Ubuntu:
Confirmed
Status in linux-oem-5.6 package in Ubuntu:
Invalid
Status in linux source package in Focal:
Fix Committed
Status in linux-oem-5.6 source package in Focal:
Confirmed
Status in linux source package in Groovy:
Confirmed
Status in linux-oem-5.6 source package in Groovy:
Invalid

Bug description:
[Impact]
Intel NVMe has a 10% chance to stop working after S3.

[Fix]
Enable ACS quirk on Intel CML root port.

[Test]
With the patch applied, Intel NVMe mostly works after S3. There's still a
1/1000 chance the issue happens. Intel is investigating the root cause.

[Regression Potential]
ACS works at hardware level, so I can't really assess the risk of
regression. Since Intel confirmed CML also needs ACS quirk, we can only
trust them until they devise a real fix.

To manage notifications about this bug go to:
https://bugs.launchpad.net/hwe-next/+bug/1900847/+subscriptions