I tested raspbian on the RPI4B board, also could reproduce this problem. steps of testing: login the raspbian, sudo mv /usr/bin/hciattach /usr/bin/hciattach-bak reboot login, check the bluetooth is not up "hcitool dev" run sudo hciattach-bak /dev/ttyAMA0 bcm43xx 921600 noflow will timeout and fail run sudo hciattach-bak /dev/ttyAMA0 bcm43xx 921600 noflow it works..
And because raspbian installed pi-bluetooth package, this issue was not exposed. ** Changed in: linux-raspi2 (Ubuntu) Importance: Undecided => Medium ** Changed in: linux-raspi2 (Ubuntu Eoan) Importance: Undecided => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1862831 Title: hciattach on rpi4 times out on first attempt To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-raspi2/+bug/1862831/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
