Huawei e169g

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Revision as of 23:02, 26 October 2008

I think I have finally cracked the issue of my 3G Huawei E169G USB stick not being detected when 'hotplugged'.

After few hours of Google'ing I found few interesting sources, but they all about E220 modem, not E169G. Anyway, it was clear that:

• the modem must be detected as 4 ttyUSB* ports
• usb_storage has to be hold off from loading to allow usbserial to finish its job

Also, it looked that E169G works nicely with Ubuntu 8.04, but why would I want to re-install something that served me well for few years by now?

I run Debian Stable (etch) and it was a bit of pain to see that the USB card is detected as a storage, but not as a ttyUSB*. In fact it was detected, but not 100% so to speak. I could see only /dev/ttyUSB0 created when the modem is plugged in, but it must be 4 ports not 1.

After multiple tries in different combinations I still couldn't get it work and when I thought 'To hell with this!' and wanted to go to bed, something made me to try again and I booted the laptop with the modem still plugged in and ... IT WORKED!

All ports detected, pon/poff works and gets me connected. Now, why does it work when the modem is plugged in when I power up the laptop and not when I want to plug it in while it's already booted? It must had something with udev/hotplug. And it did.

The answer came from [here].

So, my solution was this one:

• sudo apt-get install libusb-dev