HI today,
I could solve the problem thanks to this
https://doc.ubuntu-fr.org/kobo_by_fnac
(after gbm links) . And it was working and I refilled it with Calibre, but no Wifi connection.
Then implementing the firmware update after DNSB's it is blank with a scintillating kinda line in the middle. The LED flashes green when turning it on.
Any idea what went wrong ?