Z13 Flow 2025: Bluetooth kernel exceptions on wake
This isn't urgent for me (because I think the 6.14 kernel might fix this for 'free'). But FYI for anyone searching:
Bluetooth on the Z13 Flow 2025 (Halo 395+ CPU + mt7925e wifi/bt chip) 'mostly' works. The only problem I've seen is that if BT wake due to keyboard/bt-mouse packets will often cause a nasty kernel exception in dmesg. Only sometimes does that exception result in user-space badness/lockup.
I'll add the exception log to this the next time it happens (but really - I think not worth investigating until after 6.14 kernel is in use)
3 Replies
Here's the relevant dmesg. Strangely the exception is in amdgpu land, though problem only occurs if BT device wakes laptop. Possibly plasma trying to do some UI stuff too early?
Btw I tried using an external USB by adapter and the results were same. So it seems like it might be something due to a different path of timing when woken due to a bit packet rather than a USB keystroke. Odd! Someone should investigate someday.
Solution
fixed now