printing via serial to usb cable

[Wade Smart]

Karl F. Larsen wrote:
> Wade Smart wrote:
>> Karl F. Larsen wrote:
>>   
>>> Wade Smart wrote:
>>>     
>>>> 20090128 0906 GMT-5
>>>>
>>>> I recently posted about my parallel to usb cable causing lots of 
>>>> problems on my system - and since I received no help there I decided to 
>>>> try something else.
>>>>
>>>> I borrowed a serial to usb cable. I was able to print a test page by:
>>>> sudo echo "Printer Test" > /dev/ttyUSB0
>>>>
>>>> but I havent been able to print any other way.
>>>>
>>>> In cups I changed the uri to usb://dev/ttyUSB0 and then I ran the 
>>>> configure script but nothing changed.
>>>>
>>>> What else can I try?
>>>>
>>>> Wade
>>>>
>>>>   
>>>>       
>>>     The problem your having is VERY POOR devices to convert an old 
>>> Parallel port to a USB port. This is just a terrible thing to design! 
>>> You have data arriving in parallel and sent out in serial by the USB 
>>> port. The converter has to process the data bits fast enough to get it done.
>>>
>>>
>>>     Now going from Serial to USB is a much better thing to design. But 
>>> you need to remember that the serial port has some weird things hard for 
>>> the USB port to handle. But if you got it to work at least once, go to 
>>> the printer setup system and set it for a serial port and I may work.
>>>
>>>
>>> Karl
>>>
>>>
>>>     
>> 20090128 0932 GMT-5
>>
>> In cups I have the uri set to the above.
>>
>> Running lsusb:
>> Bus 002 Device 082: ID 05ad:0fba Y.C. Cable U.S.A., Inc.
>>
>> The driver that worked for the parallel to usb was the HP LaserJet 4050 
>> Foomatic/hpijs.hpijs 2.8.2.10 - HPLP 2.8.2 [en].
>>
>> In cups:
>> Device: gives me a drop down list with the first one being AppSocket/HP 
>> JetDirect - which Im assuming is the right one to use.
>>
>> Wade
>>
>>   
>     Can you go to System -> Administration -> Printing? This is what I 
> use to set up a printer on knome on Hardy and Intrepid.
> 
> 
> Karl

20090128 1011 GMT-5

I changed it in cups and it showed changed there too.

I just looked at the error log in cups:
E [28/Jan/2009:10:09:54 -0600] [Job 32] Unable to open device file
"/dev/ttyUSB0": Permission denied

E [28/Jan/2009:10:09:54 -0600] cupsdAuthorize: Local authentication
certificate not found!

E [28/Jan/2009:10:10:23 -0600] cupsdAuthorize: Local authentication
certificate not found!

E [28/Jan/2009:10:10:23 -0600] cupsdAuthorize: Local authentication
certificate not found!

E [28/Jan/2009:10:10:23 -0600] cupsdAuthorize: Local authentication
certificate not found!


-- 
Registered Linux User: #480675
Linux since June 2005