Re: NetworkManager and Dell 5530

[Dan Williams <dcbw redhat com>]

On Fri, 2009-03-27 at 22:10 +0000, Miles Sabin wrote:
> Apologies if this is too distro-specific for this list, but I'm
> reasonably sure it's an upstream issue ...
> 
> I've just updated from,
> 
>   NetworkManager-0.7.0.99-3.fc10
> 
> to,
> 
>   NetworkManager-0.7.0.99-5.git20090326.fc10.i386
> 
> and my Dell 5530 (aka Ericsson F3705g) has stopped working.
> 
> With the earlier release NetworkManager would recognize four devices
> (/dev/ttyUSB[0,2,4,10]) as having GSM modem capabilities and the NM
> applet would consequently present four mobile broadband devices to
> connect with. Of these only /dev/ttyUSB2 and /dev/ttyUSB4 appeared to
> actually correspond to the modem, but selecting the the NM applet menu
> entries in turn would very reliably produce a functional connection
> and ppp session.

Can you try to blacklist the 'option' driver
(in /etc/modprobe.d/blacklist by adding a link "blacklist option") and
reboot, and see how many ttys you get?  The device should then be driven
by cdc-acm instead of option, which is really the correct driver for the
modem.

Also, the output of 'udevadm info --export-db' would be useful (remove
non-tty-related entries) so we can see what the prober is doing.  We can
also log the prober output to see what's going on.

Just for reference, I did check -4 against an F3507g (same card) in a
Thinkpad X200 and it was working fine with that.  So it should be
working OK, just need to track down what the issue is.

Dan

> With the more recent release the same four devices are detected, but
> only one menu entry is presented, which always seems to correspond to
> the device's GPS capability on /dev/ttyUSB10 and consequently
> NetworkManager always fails attempting to use the device as a modem.
> 
> So two questions ...
> 
> * What information can I provide to help get this device supported properly?
> 
> * Is there a temporary workaround I can use which would allow me to
> short-circuit the modem probe and force NetworkManager to choose a
> particular device?
> 
> Cheers,
> 
> 
> Miles
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