Looking at this it seems as though this particular Gobi modem doesn't properly gets its firmware loaded, perhaps?
Right now it's blacklisted by /lib/udev/rules.d/77-mm-qdl-device-blacklist.rules:
# Acer Gobi QDL device
ATTRS{idVendor}=="05c6", ATTRS{idProduct}=="9211", ENV{ID_MM_DEVICE_IGNORE}="1"
What you could try to do would be to comment out the line starting with ATTRS above in the file, reboot, and see if the device answers better.
No, we have everything:
modem-manager[ 12298]: <debug> [1308440689.323452] [mm-manager.c:793] device_added(): (tty/ttyUSB0): port's parent device is blacklisted
Looking at this it seems as though this particular Gobi modem doesn't properly gets its firmware loaded, perhaps?
Right now it's blacklisted by /lib/udev/ rules.d/ 77-mm-qdl- device- blacklist. rules: =="05c6" , ATTRS{idProduct }=="9211" , ENV{ID_ MM_DEVICE_ IGNORE} ="1"
# Acer Gobi QDL device
ATTRS{idVendor}
What you could try to do would be to comment out the line starting with ATTRS above in the file, reboot, and see if the device answers better.