On Thursday 03 September 2009, vasya wrote:
> Hi. Here some problem - can't connect printer hp 840c on parallel port
> LPT1. Necessary kernel modules I've enabled. But CUPS by foomatic db or
> hplip by their own drivers can't detect this printer. Hplip tells me that
> "error: No device selected/specified or that supports this functionality."
> but printer on LPT port. CUPS can add this printer but can't print. How I
> can resolve it and what information I need to show you? Version of hplip -
> 3.9.4b-r1

Are you sure that you have configured parallel ports in your kernel?

What are you getting when you run:  

dmesg | grep -i parport

or,

dmesg | grep -i lp.

-- 
Regards,
Mick