Bluetooth: hci4: command 0x0406 tx timeout Bluetooth: hci3: command 0x0406 tx timeout Bluetooth: hci7: command 0x0406 tx timeout Bluetooth: hci5: command 0x0406 tx timeout Bluetooth: hci1: command 0x0406 tx timeout BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=-20 stuck for 59s! Showing busy workqueues and worker pools: workqueue events: flags=0x0 pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 refcnt=2 pending: kfree_rcu_monitor workqueue rcu_gp: flags=0x8 pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 refcnt=2 in-flight: 49:wait_rcu_exp_gp workqueue kblockd: flags=0x18 pwq 3: cpus=1 node=0 flags=0x0 nice=-20 active=1/256 refcnt=2 pending: blk_mq_timeout_work pool 0: cpus=0 node=0 flags=0x0 nice=0 hung=0s workers=4 idle: 9 3833 7 Showing backtraces of running workers in stalled CPU-bound worker pools: