[SOLVED] Best way to disable 3G modem support in Fedora 11

ajaygarg · 10-17-2011, 07:55 AM

Hi all.

I have been given an interesting assignment, as to disable the 3G modem support in Fedora 11.

Through some googling, I have been able to reach the file /lib/udev/rules.d/77-nm-probe-modem-capabilities.rules, whose contents are below :

Code:

# Only probe known mobile broadband drivers
DRIVERS=="option|sierra|hso|cdc_acm|qcserial", GOTO="probe"

GOTO="nm_modem_probe_end"

LABEL="probe"

# Don't probe new-style beagleboard cdc-acm ports
SUBSYSTEMS=="usb", ATTRS{idVendor}=="0525", GOTO="nm_modem_probe_end"

SUBSYSTEM=="tty", SUBSYSTEMS=="usb", DRIVERS=="?*", ENV{NM_MODEM_DRIVER}="$attr{driver}"
SUBSYSTEM=="tty", SUBSYSTEMS=="usb", ATTRS{bInterfaceNumber}=="?*", ENV{NM_MODEM_USB_INTERFACE_NUMBER}="$attr{bInterfaceNumber}"
SUBSYSTEM=="tty", SUBSYSTEMS=="usb", ATTRS{idVendor}=="?*", ATTRS{idProduct}=="?*", IMPORT{program}="nm-modem-probe --vid 0x$attr{idVendor} --pid 0x$attr{idProduct} --usb-interface $env{NM_MODEM_USB_INTERFACE_NUMBER} --driver $env{NM_MODEM_DRIVER} --delay 3000 --export $tempnode", GOTO="nm_modem_probe_end"

LABEL="nm_modem_probe_end"

I have the following queries / dumb questions :-|

1. As the removal of driver itself seems to be the best option, how can I know the driver? That is, how can I extract the value of $env{NM_MODEM_DRIVER}?

2. I suppose the removal of this driver, will disable modem configuration for any standard (and not just 3G). Is my assumption reasonable?

3. Is there a better method to disable 3G modem support?

Looking forward to a reply.

Regards,
Ajay

corp769 · 10-17-2011, 08:13 AM

Hello,

For something like this, I would go the trial and error route - If anything, make a backup of that file, then delete it, and see if that would do the trick. That would be my first guess; But, that is how I learn about things; See what happens when you do this and that, etc. As far as getting the contents of NM_MODEM_DRIVER, I would use echo to try to echo the environmental variable, if that what it really is:

Code:

echo $NM_MODEM_DRIVER

Cheers,

Josh

ajaygarg · 10-17-2011, 10:16 PM

Thanks corp769.

I have create a new thread (with a slightly different ticket, but hopefully that should also be a guide to resolving this).
http://www.linuxquestions.org/questi...29#post4501029

Thanks and Regards,
Ajay

ajaygarg · 02-26-2012, 10:51 PM

Well, in my case, I did the following to accomplisy my purpose ::

Code:

sudo chmod 0000 /usr/sbin/modem-manager

as NetworkManager delegates the network-usb operations to "modem-manager" service.