Nia kernel sources are outdated

[Szybet]

The kernel shipped with nickel is different in many ways ( battery consumption, touchscreen wake up calls ). Could we get an updated version in the repo, Please?

[lordfolken]

I second this. XCSoar has several issues due non-current kernel.
XCSoar/XCSoar#939

The project also needs a kernel, to provide an OTG mode.

XCSoar/XCSoar#963

[Szybet]

i think i can help you with those problems.
About building kernel, you can look in this repo for some instructions:
https://github.com/Szybet/kobo-nia-audio
And in this repo for building the kernel / modules
https://github.com/Kobo-InkBox/kernel
as for otg mode, it can be turned on on the nia like that:

mount -t debugfs none /sys/kernel/debug
echo host > /sys/kernel/debug/ci_hdrc.0/role

but to work the ereader needs to be charged
but still an updated kernel would solve other issues.

[lordfolken]

That would be interesting.
We currenlty use another kernel for OTG on the devices.
https://github.com/XCSoar/XCSoar/blob/ae4a1956dcf48f25427a75dd48e27b7da0733b53/src/Kobo/SystemDialog.cpp