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Message #23517
[Bug 1764684] Re: Fix an issue that some PCI devices get incorrectly suspended
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-
xenial' to 'verification-done-xenial'. If the problem still exists,
change the tag 'verification-needed-xenial' to 'verification-failed-
xenial'.
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-xenial
** Changed in: linux-oem (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/1764684
Title:
Fix an issue that some PCI devices get incorrectly suspended
Status in HWE Next:
New
Status in linux package in Ubuntu:
Triaged
Status in linux-oem package in Ubuntu:
Invalid
Status in linux source package in Xenial:
Invalid
Status in linux-oem source package in Xenial:
Fix Committed
Status in linux source package in Bionic:
Triaged
Status in linux-oem source package in Bionic:
New
Bug description:
===SRU Justification===
[Impact]
Some PCI device are not power managed by system firmware get runtime suspended incorrectly. In this case it's an xHC device, which can't be woken up by plugging USB device.
[Test]
With the patch, the xHC no longer get put to suspend incorrectly. USB devices can work on the xHC now.
[Fix]
We need to check if the device is power managed by system firmware, also if it supports PME from D3hot.
[Regression Potential]
Low.
It fixes a regression caused by the PM core refactor.
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