Comment # 14 on bug 905893 from
(In reply to Joachim Ziebs from comment #13)
> (In reply to Bruno Pesavento from comment #12)
> 
> Well, actually none of the abovementioned ideas helped.

OK thanks; so apparently my laptop and/or my e156G have timing problems that
cause conflict between the "option" and "usb-storage" drivers.
Accordingly, my fixes should be considered as configuration-specific.
But looking at your dmesg:

[100742.631145] usb-storage 2-4:1.0: USB Mass Storage device detected
[100742.631549] option 2-4:1.0: GSM modem (1-port) converter detected
[100742.631845] usb 2-4: GSM modem (1-port) converter now attached to ttyUSB0
[100742.632083] usb-storage 2-4:1.1: USB Mass Storage device detected
[100742.632497] option 2-4:1.1: GSM modem (1-port) converter detected
[100742.632783] usb 2-4: GSM modem (1-port) converter now attached to ttyUSB1

I still wonder how "option" and "usb-storage" engaging the same ports might
cause no harm in your case.


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