** Changed in: linux-oem-osp1 (Ubuntu Bionic)
Status: New => Fix Committed
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https://bugs.launchpad.net/bugs/1855312
Title:
Fix unusable USB hub on Dell TB16 after S3
Status in HWE Next:
New
Status in linux package in Ubuntu:
In Progress
Status in linux-oem package in Ubuntu:
New
Status in linux-oem-osp1 package in Ubuntu:
New
Status in linux source package in Bionic:
In Progress
Status in linux-oem source package in Bionic:
Fix Committed
Status in linux-oem-osp1 source package in Bionic:
Fix Committed
Status in linux source package in Disco:
In Progress
Status in linux-oem source package in Disco:
Won't Fix
Status in linux-oem-osp1 source package in Disco:
Won't Fix
Status in linux source package in Eoan:
In Progress
Status in linux-oem source package in Eoan:
Won't Fix
Status in linux-oem-osp1 source package in Eoan:
Won't Fix
Bug description:
[Impact]
Sometimes USB hub on Dell TB16 stop working after S3.
[Fix]
Attempt to power cycle USB device when a it's stuck at eSS.Disabled
state, it's basically not recoverable.
[Test]
After applying the patch, USB ports and USB ethernet are still working
after 100 times S3 stress test.
Tested on other platforms and didn't observe any regression.
However, I have never seen any other USB device stuck in eSS.Disabled state,
so the code path wasn't executed at all.
[Regression Potential]
Low. This is a last resort attempt, in most cases this code path won't
be reached.
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