IPP vs LPD printing

[Helge Blischke]

Dean Montgomery wrote:

> Our school district is running TOSHIBA e-STUDIO523 copiers with department
> codes enforced.  There is one strange behaviour that I can't figure out
> when it comes to IPP vs LPD printing...
> 
> LPD://toshiba/Print will cause cups to immediately pass jobs to the
> copier's queue even if the department code is invalid.  Invalid jobs are
> held and managed on the copier.  Valid jobs will print even if there are
> Invalid jobs in the queue.
> 
> IPP://toshiba/Print will cause the jobs to stop queueing on the copier as
> soon as the first invalid job is sent.  Jobs wait on the CUPS server until
> the invalid job is released or deleted then the other jobs can send.  This
> is undesirable as one invalid job causes everyone to not be able to print.
>  IPP protocol does provide more feedback to the end-user (low paper trays,
> who's printing etc).
> 
> 
> Is there a way to have the CUPS server to not hold up the queue when there
> is an invalid department code in IPP mode printing?

Try changing the device URI to

ipp://thoshiba/Print?waitjob=false

otherwise CUPS waits for the just submitted job to complete.

Helge