I tried a newer kernel (2.4.16) same results. I found a printer which could
be placed in hex dump mode.
Only E0 or 00 are printed to the printer. The driver debug messages looked
like they were correct hex
values for the file I was trying to print. Its almost like the data is
manipulated just before it is sent
out to the printer. I don't think it is Belkin specific. As near as I could
tell any driver which uses the
generic serial read/write routines would see this problem. I tried another
device (Not Belkin) it
behaved the same as the Belkin just E0 or 00.
Any Ideas?
Regards
--Richard
Greg KH <[EMAIL PROTECTED]>
Sent by: To: Richard
Johnston/Rochester/IBM@IBMUS
[EMAIL PROTECTED] cc:
[EMAIL PROTECTED]
ceforge.net Subject: Re:
[Linux-usb-users] Trouble using Belkin USB-Serial adapter with a serial
printer
12/10/01 02:29 PM
On Mon, Dec 10, 2001 at 12:09:37PM -0600, Richard Johnston wrote:
> Has anyone been successful using a USB-Serial adapter to hook to a serial
> printer?
> Specifically I am running a 2.4.5 kernel and trying to use a Belkin FU103
> with firmware greater than 2.08.
Could you try a newer kernel? I think a few things have been changed in
the usb-serial code since that version.
> I first successfully connected the printer to /dev/ttyS0 and it printed
> fine.
> I then plugged in the Belkin adapter and the kernel module loaded fine.
> I then moved the cable from the serial port to the Belkin adapter and
fixed
> the printcap device (set to /dev/ttyUSB0)
>
> The when I tried to print the green light came on but the printer
reported
> bad serial transmission and garbage was printed.
> I verified that the tty setting matched the serial port, they did.
> I then tried hardware flow control (stty -F /dev/ttyUSB0 crtscts) No
change
>
> Any ideas?
If you enable debugging for the belkin driver, does it tell you anything
strange? (load the driver with "debug=1")
thanks,
greg k-h
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