** Changed in: hwe-next
Status: New => Fix Released
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https://bugs.launchpad.net/bugs/1954369
Title:
Fix runtime power management on USB controller with
XHCI_RESET_ON_RESUME flag
Status in HWE Next:
Fix Released
Status in linux package in Ubuntu:
Fix Released
Status in linux-oem-5.14 package in Ubuntu:
Invalid
Status in linux source package in Focal:
Won't Fix
Status in linux-oem-5.14 source package in Focal:
Fix Released
Bug description:
[Impact]
xHCI driver's runtime resume routine tries to reset USB controller with
XHCI_RESET_ON_RESUME flag. That causes USB devices connect to the xHCI
fail to work.
[Fix]
Disable runtime power management regardless of
CONFIG_USB_DEFAULT_PERSIST option.
[Test]
USB devices which connect to the xHCI controller can work normally.
[Where problems could occur]
USB_DEFAULT_PERSIST is a config for system-wide PM to speed up resume
time, so it shouldn't be applied to runtime PM at first place.
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