[Lcdproc] Unknown VFD display

[Mattia Jona-Lasinio]

> Hi all,

Hi,


> According to the documentation of lcdproc, most USB displays use the
> device /dev/ttyUSB*.
> But I don't have such a device. Is it the kernel that's responsible
> for creating this device or is it one of the lcdproc drivers? I assume
> that I have to see the device in dmesg before I can start using
> lcdproc?

The kernel is responsible for handling data on a particular device. If you 
don't have /dev/ttyUSB*, then create them with mknod. It is a char 
device with major number 188 and minor number 0 1 2 3 4 and so on.

mknod /dev/ttyUSB0 c 188 0
mknod /dev/ttyUSB1 c 188 1
...

Once you have the device file, it is up to the kernel to handle data 
written on that file. If it doesn't work or receive messages like "no such 
device" or similar, you should probably enable the ttyUSB support in the 
kernel somewhere in the USB or char device section of the kernel 
configuration. If it is supported you should see something in 
/proc/devices in the "Character devices:" section. You should see "188 
...(don't remember the name)". If you don't see anything then your kernel 
does not have support enabled for such devices and you must recompile your 
kernel.

Hope this will help!

Bye,

 	Mattia