Bluetooth keeps disconnecting. 
I am on 20.04 with kernel 5.6.3.

Pairing is very unstable if I want to pair my mx keys keyboard it works
only when I disconnect all bluetooth devices including my mx master 3
and than pair the desired device only. After that enabling my devices
keyboard and mouse works but as said the keyboard disconnects and
sometimes replicates a key stroke multiple times.

Also bluetooth headset does not work. It connects (same as above) but
plays only weird cracking sound.


dmesg | grep Blue
[    3.146254] Bluetooth: Core ver 2.22
[    3.146265] Bluetooth: HCI device and connection manager initialized
[    3.146268] Bluetooth: HCI socket layer initialized
[    3.146269] Bluetooth: L2CAP socket layer initialized
[    3.146271] Bluetooth: SCO socket layer initialized
[    3.151323] Bluetooth: hci0: Bootloader revision 0.3 build 0 week 24 2017
[    3.152333] Bluetooth: hci0: Device revision is 1
[    3.152334] Bluetooth: hci0: Secure boot is enabled
[    3.152334] Bluetooth: hci0: OTP lock is enabled
[    3.152335] Bluetooth: hci0: API lock is enabled
[    3.152335] Bluetooth: hci0: Debug lock is disabled
[    3.152336] Bluetooth: hci0: Minimum firmware build 1 week 10 2014
[    3.153088] Bluetooth: hci0: Found device firmware: intel/ibt-20-1-3.sfi
[    4.649137] Bluetooth: hci0: Waiting for firmware download to complete
[    4.649303] Bluetooth: hci0: Firmware loaded in 1463906 usecs
[    4.649330] Bluetooth: hci0: Waiting for device to boot
[    4.663324] Bluetooth: hci0: Device booted in 13671 usecs
[    4.666107] Bluetooth: hci0: Found Intel DDC parameters: intel/ibt-20-1-3.ddc
[    4.666330] Bluetooth: hci0: Failed to send Intel_Write_DDC (-22)
[    4.668309] Bluetooth: hci0: Firmware revision 0.0 build 128 week 11 2020
[    5.357694] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[    5.357695] Bluetooth: BNEP filters: protocol multicast
[    5.357698] Bluetooth: BNEP socket layer initialized
[   25.972964] Bluetooth: RFCOMM TTY layer initialized
[   25.972969] Bluetooth: RFCOMM socket layer initialized
[   25.972972] Bluetooth: RFCOMM ver 1.11
[ 4639.734854] Bluetooth: hci0: command 0x0402 tx timeout
[ 4641.750537] Bluetooth: hci0: command 0x2042 tx timeout

Should I open another bug report for this?
Any additional info needed?

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https://bugs.launchpad.net/bugs/1840264

Title:
  Bluetooth broken on 18.04 with linux-hwe 5.0

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