Trying to activate a USB modem on my computer (see steps below) disables sound in all applications and all wireless communication and it appears may be responsible for disabling portions of other applications.
Unfortunately I
must have the modem capability where I do most of my computer work and the computer has no built in modem.
Support from Dell "Linux Support" has been less than useless. I am not all that advanced in Linux as yet so it does not take much jargon to confuse me.
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Documentation for a similar but different modem/sound/wireless "Dell problem" is found at:
http://linux.dell.com/wiki/index.php..._Does_Not_Work
http://linux.dell.com/wiki/index.php...Kernel_Upgrade
& known issues list at bottom of:
http://linux.dell.com/wiki/index.php/Ubuntu_8.04
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System Specifications:
Computer:........ Dell Studio 1535 laptop
Modem ........... USRobotics usr5837
OS............... Ubuntu 8.04 (hardy heron)
-- Kernel ....... 2.6.24-16 generic
-- Gnome ........ 2.22.1
Processor 0: .... Intel Core 2 Duo CPU T5750 @ 2.00GHz
Processor 1: .... Intel Core 2 Duo CPU T5750 @ 2.00GHz
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USRobotics Modem Information
The modem which is touted as Plug and Play does not work until steps 1-4 of the troubleshooting routine provided by USRobotics are executed.
Then the modem works but the Sound, wireless etc. won't work.
--------- USRobotics Trouble shoot instructions --------
Open a terminal shell and log in as root.
1. Verify modem enumeration with the following command:
lsusb
Below is an example output.
Bus 001 Device 002: ID 0baf:0303 U.S. Robotics
2. Verify the CDC ACM module as loaded with the following command:
lsmod
If the version of Linux kernel has the CDC ACM driver compiled into it, you
should now be able to use a terminal emulator program (for example: minicom)
to attach to the modem.
If the kernel has the CDC ACM driver built as a module, then you may have to
enable the driver with the following command:
modprobe acm
(used in 2.4.x kernels)
modprobe cdc_acm
(used in 2.6.x kernels)
3. Verify device node creation.
Some distributions will automatically create a device node
for the modem in /dev. Below is the device node as created in Fedora 7.
crw-rw---- 1 root uucp 166, 0 2007-09-12 10:33 ttyACM0
The CDC ACM driver allows up to 32 modems. If the device node does not exist,
create one using the following command:
mknod /dev/ttyACM0 c 166 0
Additional device nodes can be created for additional modems as follows:
mknod /dev/ttyACM1 c 166 1
mknod /dev/ttyACM2 c 166 2
mknod /dev/ttyACM3 c 166 3
4. Access the modem.
Use a terminal emulator program (for example: minicom) to access the modem using
the device node created above. For example, setup the serial port for minicom to
use the device node /dev/ttyACM0.
5. Internet dialers.
Applications such as WvDial and KPPP may require access to the modem via the
/dev/modem device node.
You can set up a symbolic link from /dev/modem to the ACM modem device by using
the following command:
ln -s /dev/ttyACM0 /dev/modem
)
