** Changed in: linux (Ubuntu Cosmic)
Status: New => Fix Committed
** Changed in: linux (Ubuntu Bionic)
Status: New => Fix Committed
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https://bugs.launchpad.net/bugs/1812812
Title:
Fix non-working QCA Rome Bluetooth after S3
Status in HWE Next:
New
Status in linux package in Ubuntu:
Fix Committed
Status in linux source package in Bionic:
Fix Committed
Status in linux source package in Cosmic:
Fix Committed
Status in linux source package in Disco:
Fix Committed
Bug description:
[Impact]
Sometimes QCA Rome Bluetooth USB host doesn't work after S3:
[ 165.110742] Bluetooth: hci0: using NVM file: qca/nvm_usb_00000302.bin
[ 168.432065] Bluetooth: hci0: Failed to send body at 4 of 1953 (-110)
This is due to USB core enables LPM two times after S3.
[Fix]
Only enable LPM once.
[Test]
The Bluetooth USB works all the time after applying the fix.
[Regression Potential]
Low. Enabling a hardware feature twice in a row isn't right, I'd be surprise
if any hardware relies on this driver behavior.
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