ChromeOS Flex Bluetooth error

[Zsolt Furrier]

Hello... I have a problem that when the system updates itself, the bluetooth works, but at the next startup it doesn't work anymore... Even its switch becomes inactive... How can I turn it back on...?

[dragon788 (dragon788)]

We'll need more details, like the bluetooth chipset, this should be visible in the crosh shell (Ctrl+Alt+t) if you run `dmesg`. You can also run `dmesg` before suspending and after resuming to see whether it is the sleep state that breaks things. Test from a fresh power up and then after a sleep (close the screen and open again in a couple minutes).

[Zsolt Szűcs]

Broadcom 2070

[dragon788]

Will probably need the dmesg output as well to see if it is failing to load the firmware on a resume after the update. 

You can check these resources and if your Flex device is in Developer mode you might be able to fix the issue, if it is not you are stuck either powering off and doing a cold boot to hopefully get the firmware loaded correctly or turning off the wireless. There isn't really an "airplane mode" in ChromeOS to try forcing it to reload the firmware the way you can with Android devices.

I'm not sure if switching to developer mode on Flex automatically triggers a Powerwash the way it does on a ChromeOS device, but back up your data if you decide to get deep into the weeds.

https://github.com/winterheart/broadcom-bt-firmware

https://askubuntu.com/a/985016