So after i tested now 2 different Bluetooth dongles, i am getting frustrated.
My Dongles, which were working fine on the RaspberryPI3, do now not work anymore as the XU4 is using 3.10.
The worst part on this, is that based on information i can find in the internet on the repositories of several developers, 3.10 broke Bluetooth more or less.
If someone knows how to fix this manually, i would appreciate this.
Otherwise i would be really happy if the Kernelsupport for the XU4 from Recalbox could be manage to be done to the most current supported Linux Kernel, which is supported by Hardkernel.
Kind regards
Tepoo
do you really not get any BT dongle working or is just the gui telling you being unable to connect?!
I've also a XU4 and experienced problems with my dongles! In the end it was just the gui which told me being unable to connect but when I used ssh and bluetoothctl it was working like it should. Give me feedback whether you need any help with it..
You are right, over the bluetoothctl it works oob.
all of them.
Thanks alot.
We should b*mp to kernel 4.14 as HardKernel told us they consider it stable now and encourage us to go with it.
Can't try BT on XU4 yet, but as far as I remember, it used to work
the tip from basti works.
the onlything which is abit annoying right now is that the controllers does not auto pair on startup or restart.
and yes, i would also love to see the upgrade to 4.14.
Thanks for answering to my problem, i highly appreciate this 
Keep up the nice work guys.
King regards
your're welcome
try to use "bluetoothctl trust MAC-OF-CONTROLLER". I did this once and then all of them are now doing the autoconnect.
I'll always be so impressed about how people can miss reading the Recalbox Wiki ... Everything is explained over there ...
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don't get me wrong, but would you mind linking me the part about bluetoothctl on your wiki?
i spend 1 week of researching through google and your wiki, to find a solution for this. and i ended up alot with bluetoothctl on google, but not on your wiki, also for someone who is not into bluetooth console based handling that much, it is not very logical that the bluetoothctl system works oob but the recalbox gui itself fails on this by saying "No Controller found".
@Basti
i did what you suggested, and trusted the devices indeed, but it does not work.
based on my last tests, it was always neccessary to go into bluetoothctl and first make "power on" and "agent on" before i was able to pair the devices.
so trusting the devices, will not help alot here, would it?
Kind regards
Tepoo
@tepoo https://github.com/recalbox/recalbox-os/wiki/Connect-bluetooth-controller-manually-(EN)#if-your-recalbox-version-is-41x-or-later
Former dev - Please reply with @substring so that i am notified when you answer me
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@substring could you also have a look at my post I did last weekend? I'm experiencing troubles with mixing controllers when using the PS3 controller drivers..
@substring said in [REQUEST] Update XU4 Kernel to 4.0+:
@tepoo https://github.com/recalbox/recalbox-os/wiki/Connect-bluetooth-controller-manually-(EN)#if-your-recalbox-version-is-41x-or-later
weird,
if i search for bluetoothctl on the github it sais nothing found on that repository.
i guess the search function is not working pretty well.
@tepoo yeah I think it only search inside commits and issues, not wiki
do you really not get any BT dongle working or is just the gui telling you being unable to connect?!
I've also a XU4 and experienced problems with my dongles! In the end it was just the gui which told me being unable to connect but when I used ssh and bluetoothctl it was working like it should. Give me feedback whether you need any help with it..
