Arch Linux

Description:

Bluetooth stops working after the kernel 5.12.9 update. there is a timeout error that appears on hci0 stating "command 0xfc1e tx timeout. mobprobe and systemd loads the module and show that is working fine.

systemctl

accounts-daemon.service loaded active running
bluetooth-mesh.service loaded active running
bluetooth.service loaded active running

modprobe

bluetooth 724992 19 btrtl,btintel,btbcm,bnep,btusb,rfcomm
ecdh_generic 16384 1 bluetooth
crc16 16384 1 bluetooth
rfkill 28672 9 bluetooth,cfg80211

Additional info:

[ 2.767627] Bluetooth: hci0: Bootloader revision 0.1 build 42 week 52 2015
[ 2.768630] Bluetooth: hci0: Device revision is 2
[ 2.768634] Bluetooth: hci0: Secure boot is enabled
[ 2.768636] Bluetooth: hci0: OTP lock is enabled
[ 2.768638] Bluetooth: hci0: API lock is enabled
[ 2.768639] Bluetooth: hci0: Debug lock is disabled
[ 2.768641] Bluetooth: hci0: Minimum firmware build 1 week 10 2014
[ 2.773125] Bluetooth: hci0: Found device firmware: intel/ibt-17-16-1.sfi
[ 4.230723] Bluetooth: hci0: Waiting for firmware download to complete
[ 4.231621] Bluetooth: hci0: Firmware loaded in 1430851 usecs
[ 4.231650] Bluetooth: hci0: Waiting for device to boot
[ 4.245657] Bluetooth: hci0: Device booted in 13704 usecs
[ 4.245703] Bluetooth: hci0: Found Intel DDC parameters: intel/ibt-17-16-1.ddc
[ 4.247713] Bluetooth: hci0: Applying Intel DDC parameters completed
[ 4.250737] Bluetooth: hci0: Firmware revision 0.1 build 6 week 12 2021
[ 6.399878] Bluetooth: hci0: command 0xfc1e tx timeout
[14836.949706] Bluetooth: hci0: command 0xfc1e tx timeout
[16499.409820] Bluetooth: hci0: Firmware revision 0.1 build 6 week 12 2021
[16501.545051] Bluetooth: hci0: command 0xfc1e tx timeout


There is a known issue that was patched already but for the previous kernel [5.9.x-5.10.x]

https://marc.info/?l=linux-bluetooth&m=160378222632366&w=2

Steps to reproduce:

install kernel 5.12.9.

Steps to Fix it:

install kernel 5.13-rc5.
it seems to included new lines of code that solve this problem.