@PHLin
This should be the infamous xHCI incompatibility issue.
Can you try the following command as root and verify if it can fix it?
/usr/bin/setpci -s 00:14 d0.w=0x01db
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
** Changed in: hwe-next
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1381906
Title:
[Dell Latitude E5550] Atheros Bluetooth [0cf3:e005] gone after suspend
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