Comment 7 for bug 469376

I reported this problem quite some time ago, and considering it causes a
total system lockup, I am surprised I cannot seem get anyone interested
to actually do anything to get this fixed, but I have now confirmed what
is actually happening.

In a nutshell, when the USB subsystem detects the Quicksilver modem, it
hands off to the "Gnome Network Manager", which in turn hands off to the
new "Gnome Modem Manager". The "Gnome Modem Manager" then grabs the
ttyHS* ports even though it has no idea how to handle the Quicksilver
ttyHS* devices correctly and proceeds to lock up the entire computer in
it's persistant efforts to do exactly the wrong thing.

I have not found a way to tell Gnome Network Manager and/or it's partner
in this abuse Gnome Modem Manager to back off and do not touch the
Quicksilver ttyHS* devices because they obviously do not know how to
handle and control these devices correctly.

A drakonian approach is to simply completely uninstall Gnome Network
Manager and Gnome Modem Manager. However this also eliminates the
good things they do for wired and wifi connections. Unfortunately I
have not yet found a better way to address this issue.

For some more into on the topic you can check out this URL
> http://www.pharscape.org/forum/index.php/topic,802.0.html
This is the forum for the HSOconnect gui tool for the hso driver.