Hello,

I am using OpenBSD 5.1, i386 version.

I own an Acer ao532h netbook which comes with Huawei EM770W,
a 3G modem, connected via mini PCI-e bus.

I succeeded to make it work as GPS receiver as following
1) echo "AT^WPDGP" > /dev/cuaU0
2) GPS data in NMEA format is being received from /dev/cuaU3.
I get these data simply by 'cat /dev/cuaU3'.
3) To stop GPS data, you need to do  "echo "AT^WPEND" > /dev/cuaU0"

However, it is not possible to undo that command, i.e. when you press
Ctrl+C to interrupt the cat /dev/cuaU3, it simply hangs, and system itself
freezes. If I send halt or reboot in another terminal, the X server
stops working,
but system remains at console login prompt mode, and don't react to
keyboard.

This behavior is specific to /dev/cuaU3 only, cuaU1,2 and 4 works fine with cat.

Any advices on what kind of issue this could be are very welcome!

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