zmkfirmware
Can't pair to both Ubuntu and Windows on the same laptop.
I dual boot Ubuntu and Windows 11. I had my keyboard paired with W11 (as well as a phone and a tablet). I then booted in Ubuntu and tried to pair. I was getting authorization failed messages from bluetoothctl. I cleared all the bluetooth profiles. It paired and connected. I then booted W11 and tried to re-pair. It wouldn't do it. This time, I only cleared the profile for the Ubuntu connection. All of a sudden, it would pair.
It seems like ZMK doesn't want to pair to two OSes on the same device (or with the same bluetooth MAC address?).
Is this a fundamental bluetooth issue or a ZMK issue?
Originally posted by @BenBlumer in https://github.com/zmkfirmware/zmk/issues/1189#issuecomment-1815744862
Zmk enforces strict security and won't store multiple keys for the same device, there is a way to do it though https://hoelter.prose.sh/kinesis-advantage-360-bluetooth-dualboot
I think it would be good to put a pointer to the wiki (with a short summary) in the docs, under the Bluetooth feature page troubleshooting header.
Zmk enforces strict security and won't store multiple keys for the same device, there is a way to do it though https://hoelter.prose.sh/kinesis-advantage-360-bluetooth-dualboot
What is the security risk? Genuinely asking.
I can understand preventing a device from pairing itself by saying "Trust me -- we've already paired!". Is that risk not solved by insisting each OS must pair to a different BT profile on the ZMK? That way a user has to explicitly pair the device, as they always do, and we should have the same amount of security we always have.
What is the security risk? Genuinely asking.
Does anyone know? I'd love to understand what the supposed security risk is. Having to copy over the pairing keys feels like a significant low-level hassle that a regular user should not have to go through...
Would it be possible to patch this behaviour out, even unofficially? I have no idea at what part of the ZMK source to look at...
