Reconnecting after disconnect not possible

[Bernd Eggink]

On 30.04.2015 21:12, Aleksander Morgado wrote:
> Ok, thanks, so this is a Sierra EM7305. There were recent reports of
> this modem failing in MBIM mode but working in QMI mode, see:
>
> http://news.gmane.org/gmane.linux.network.modemmanager.devel/cutoff=40
>
> You can try to switch to QMI mode by switching to USB interface
> configuration #1; e.g. as the previous reporter did (you'll need to
> specify the proper usb path):
> echo 1 > /sys/bus/usb/devices/1-11/bConfigurationValue

Hm, if I do that, the devices disappears immediately. Does it require 
some special kernel settings or whatever?

Bernd