Hot Plug wireless Modems

[Derek Broughton]

Nils Kassube wrote:

> Ron Ellison wrote:
>> I can plug my Dell modem into Ubuntu, but I must Load USBSERIAL by
>> manual command.

What manual command?

>> The command is ignored if USBSERIAL is in Use.
>> So I must unplug every device that uses USB-serial,
>> and then install my modem.  Then load USB-serial.
>> Then finally install my other devices.
> 
> Can you clarify which module you really mean? First you are talking
> about "USBSERIAL" and then "USB-serial" but in the standard kernel
> package none of them exist. However there IS a module "usbserial". Did you
> perhaps build a special module for your device? When referring to
> modules, please take care of exact spelling and remember that file names
> are case sensitive.
> 
> OTOH, it should not be necessary to load modules manually, that should be
> done by udev automatically when the device is connected to your machine.
> Maybe there is a rule missing for your device? Furthermore it shouldn't
> be necessary to load a module a second time if there are several devices
> which use the same module. Do you have to enter options when loading the
> module which are specific for your modem?

My mind boggles to think that he not only has more than one device using a
usbserial connection, but apparently more than two...

Anyway, it suggests to me that perhaps a simple "modprobe" isn't enough, and
that for his specific modem he needs to supply some parameters that don't
get supplied by default, as you say.  Since the other devices seem to work
_after_ he loads the module, it's quite possible that a single modification
in /etc/modprobe.d could fix things.  But we need to know what command is
being used to successfully install the module.

> There is a module named "sierra" and a module named "option". Probably one
> of those is meant - did you try to load one them instead? However we can't
> tell you which because you didn't tell us what hardware you are talking
> about. A "Hot Plug wireless Modem" or a "Dell modem" can be many things.
> Well, maybe not if you are familiar with Dell products. 

Oh yeah - as with many modems and NICs hardware with the same model numbers
can actually be different inside...

-- 
derek