[Bug 1929791] Re: Bluetooth does not start if system boots from USB

[Dave Jones]

I haven't managed to reproduce this on several systems (pi4 booting from
USB, pi5 booting from NVMe, etc). Setting to incomplete until anyone can
come up with a firm reproduction case.

** Changed in: pi-bluetooth (Ubuntu)
       Status: New => Incomplete

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Title:
  Bluetooth does not start if system boots from USB

Status in linux-raspi2 package in Ubuntu:
  Invalid
Status in pi-bluetooth package in Ubuntu:
  Incomplete

Bug description:
  Hello! I have a strange bug with Bluetooth on Raspberry Pi 4 8Gb and Ubuntu 21.04 (also had it on Ubuntu 20.10). It's internal Bluetooth adapder does not initialize, if I boot system from USB, wherein does not matter what I am using: 16 Gb USB Flash Drive, 2 Tb External USB HDD or 1 Tb External SSD. After system boot up, it shows me "no Bluetooth adapters found", hcidev also shows nothing. I'm getting hciuart.service error:
  ===================
  taras at taras-rpi:~$ systemctl status hciuart.service
  ● hciuart.service - Configure Bluetooth Modems connected by UART
       Loaded: loaded (/lib/systemd/system/hciuart.service; enabled; vendor prese>
       Active: failed (Result: exit-code) since Thu 2021-05-27 08:22:57 EEST; 3mi>
      Process: 599 ExecStart=/usr/bin/btuart (code=exited, status=1/FAILURE)

  тра 27 08:22:46 taras-rpi systemd[1]: Starting Configure Bluetooth Modems conne>
  тра 27 08:22:57 taras-rpi btuart[631]: Initialization timed out.
  тра 27 08:22:57 taras-rpi btuart[631]: bcm43xx_init
  тра 27 08:22:57 taras-rpi btuart[631]: Flash firmware /lib/firmware/brcm/BCM434>
  тра 27 08:22:57 taras-rpi btuart[631]: Set Controller UART speed to 3000000 bit>
  тра 27 08:22:57 taras-rpi systemd[1]: hciuart.service: Control process exited, >
  тра 27 08:22:57 taras-rpi systemd[1]: hciuart.service: Failed with result 'exit>
  тра 27 08:22:57 taras-rpi systemd[1]: Failed to start Configure Bluetooth Modem>
  ===================
  But if I continue reboot system, it may appear in 1-2 cases from 10. It'v very strange.
  If I disable this service manually via:
  ===================
  sudo systemctl disable hciuart.service
  ===================
  restart the system and run:
  ===================
  sudo systemctl start hciuart.service
  ===================
  Bluetooth adapter will appear in 100% cases. And if I boot Ubuntu from microSD card, everything works properly, Bluetooth starts all times. I thought, mb here is not enougth power for USB devices. I've bought USB hub with external power, but it does not help.
  Must say, that I don't have this problem on Raspberry Pi OS, I have it on USB HDD too and it works without any problems.
  Any suggestions?

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