[cups.general] 35257-cups.general at news.easysw.com

Tue May 19 16:20:16 PDT 2009

On May 19, 2009, at 1:41 PM, Steve Smith wrote:
> Hi
>
> The RAW CUPS queues are set to use AppSocket/HP JetDirect
> socket://ip address:9100

OK, that's the "right" answer...

> I guess the underlying question is how does CUPS know how much data  
> it can
> send to the plotter in one go, it seems to be 'drip feeding'.

CUPS sends data as fast as the printer will accept it.

Have you tried using Wireshark to capture the data going to the  
printer to see whether the printer is delaying its acks?

> Steve Smith - GEO Designs Limited
>
> (voice) +44 (0)2392 466750
> (fax) +44 (0)2392 637390
> (mob) +44 (0)7973 392069
> steve at gdesigns.co.uk
> www.gdesigns.co.uk
>
> Please contact us if you CGM files, we have the solutions
> -----Original Message-----
> From: cups-bounces at easysw.com [mailto:cups-bounces at easysw.com] On  
> Behalf Of
> cups-request at easysw.com
> Sent: 19 May 2009 20:00
> To: cups at easysw.com
> Subject: cups Digest, Vol 64, Issue 22
>
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>
> Today's Topics:
>
>   1. Re: Restricting use of a colour printer	toblack-and-white
>      (Brett Ussher)
>   2. Does CUPS keep the PS files it generates for	printing?
>      (Brett Ussher)
>   3. Re: Print Speed (Michael Sweet)
>   4. Re: Does CUPS keep the PS files it generates for	printing?
>      (Michael Sweet)
>   5. Tray-Control Duplex (max server)
>   6. Re: Tray-Control Duplex (Helge Blischke)
>   7. Re: Tray-Control Duplex (max server)
>   8. Re: Tray-Control Duplex (Michael Sweet)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Mon, 18 May 2009 17:58:49 -0700
> From: Brett Ussher <breusshe at hotmail.com>
> Subject: Re: [cups.general] Restricting use of a colour printer
> 	toblack-and-white
> To: cups at easysw.com
> Message-ID: <35255-cups.general at news.easysw.com>
>
> I just recently did this.  I took a color PPD file and looked  
> through it for
> awhile.  How I figured out what was a color printer setting and what  
> was
> black and white was by looking at how the driver option settings  
> appeared in
> the CUPS admin.  In the settings you can set a printer to print just  
> black
> and white, of course, but I wanted it to be the only option.  By  
> looking at
> all the other color option names and searching for them in the PPD I  
> was
> able to successfully delete all of the color settings and leave only  
> the
> black and white with composite black (grayscale) and then set those  
> options
> to the default setting for the driver.
>
> The key is to keep an original copy of the PPD so that if you mess in
> editing it, you're not out of luck.  But, all in all, it only took  
> me about
> 30 minutes to figure out what to delete from the file and I've never  
> opened
> a PPD before.
>
> Brett
>
>>>
>>> There may also be other ways to alter the PPD to make it black and
>>> white only. I am not a post script master but I have seen some of
>>> these people at work.
>>>
>>> Having two queues available to the clients is a good idea. It is  
>>> very
>>> simple protection.
>>>
>>> If the users have administration control over their machines or are
>>> able to add print queues and you require greater security then
>>> PrintAgent : http://www.lucidsystems.org/pringingworks/printagent is
>>> able to authenticate specific users to a CUPS queue. PrintAgent is
>>> also able to interface with various directory systems for password
>>> credentials so that people will be granted or denied access based  
>>> upon
>>> group membership for instance.
>>>
>>> This kind of approach allows both queues to be installed on a single
>>> machine but will only allow someone who is allowed to print to print
>>> to the color queue.
>>>
>>> Finally if the clients are *NIX based then, PrinterSetup is able to
>>> dynamically alter the queues based upon the user who is logging onto
>>> the system. So if a user is a certain group then they will have both
>>> color and black and white queues available in the print dialog box.
>>> Details on PrinterSetup is available from :
> http://www.lucidsystems.org/printingworks/printagent/
>>>
>>> I hope this helps.
>>
>> Thank you, Henri. PrintAgent is new to me and sounds to be worth
> investigating - even for uses other than the specific one I asked  
> about.
>>
>> John A. Murdie
>
>
>
> ------------------------------
>
> Message: 2
> Date: Mon, 18 May 2009 18:09:08 -0700
> From: Brett Ussher <breusshe at hotmail.com>
> Subject: [cups.general] Does CUPS keep the PS files it generates for
> 	printing?
> To: cups at easysw.com
> Message-ID: <35256-cups.general at news.easysw.com>
>
> I need to get hold of one of the postscript files that I've printed  
> (not
> anyone in particular, just need one for troubleshooting an unrelated  
> issue).
> I'm wondering if CUPS keeps a copy of the files it has printed.  I  
> found
> /var/spool/cups, but that only seems to have the log of the job that  
> was
> printed, not the job itself.  Is there a place I can look or do I  
> need to
> enable some setting to make CUPS store the PS files for a bit?
>
> Thanks,
>
> Brett Ussher
>
>
> ------------------------------
>
> Message: 3
> Date: Mon, 18 May 2009 20:06:09 -0700
> From: Michael Sweet <mike at easysw.com>
> Subject: Re: [cups.general] Print Speed
> To: cups at easysw.com
> Message-ID: <35257-cups.general at news.easysw.com>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Steve Smith wrote:
>>
>>
>> Hi
>>
>>
>>
>> We have implemented CUPS 1.3.7 for our network printing environment.
>> Our application software generates large RTL files for wide format
>> Designjet printers but we have a problem. When we print through RAW  
>> CUPS
>> queues the print speed on the Designjets is slow, The printhead  
>> does a
>> pass but then seems to be waiting for more data before the next pass.
>> If we print directly to the Designjet via TCP/IP the print speed is
>> fine.  Is there anything we can do to increase the speed as it not a
>> memory issue in the printer.
>
> What backend (device URI) are you using?
>
> -- 
> ______________________________________________________________________
> Michael Sweet, Easy Software Products           mike at easysw dot com
>
>
> ------------------------------
>
> Message: 4
> Date: Mon, 18 May 2009 20:09:59 -0700
> From: Michael Sweet <mike at easysw.com>
> Subject: Re: [cups.general] Does CUPS keep the PS files it generates
> 	for	printing?
> To: cups at easysw.com
> Message-ID: <35258-cups.general at news.easysw.com>
> Content-Type: text/plain; charset=UTF-8; format=flowed
>
> Brett Ussher wrote:
>> I need to get hold of one of the postscript files that I've printed
>> (not anyone in particular, just need one for troubleshooting an
>> unrelated issue).  I'm wondering if CUPS keeps a copy of the files it
>> has printed.  I found /var/spool/cups, but that only seems to have
>> the log of the job that was printed, not the job itself.  Is there a
>> place I can look or do I need to enable some setting to make CUPS
>> store the PS files for a bit?
>
> You won't have the printer-ready PostScript there, but if you turn
> the "PreserveJobFiles" option in cupsd.conf on, e.g.:
>
>     cupsctl PreserveJobFiles=Yes
>
> then the "d" files will still be around.
>
> -- 
> ______________________________________________________________________
> Michael Sweet, Easy Software Products           mike at easysw dot com
>
>
> ------------------------------
>
> Message: 5
> Date: Tue, 19 May 2009 00:09:57 -0700
> From: max server <max40 at gmx.de>
> Subject: [cups.general] Tray-Control Duplex
> To: cups at easysw.com
> Message-ID: <35259-cups.general at news.easysw.com>
>
> Hi,
> I have a problem
>
> I want to print duplex and provides pages of an other tray printing  
> (also
> duplex)!
>
> lp -d myprinter -o Duplex=DuplexNoTumble -o PageSize=A4 -o  
> InputSlot=Manual
> -o 3:InputSlot=Tray1 -o 4:InputSlot=Tray1 /mydoc.pdf
>
> The document has 6 pages!
> Page 1 and 2 also 5 and 6 will be correctly printed (duplex)
> Page 3 and 4 be printed simplex !
> The same even if b
>
>
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________________________________________
Michael R Sweet, Senior Printing System Engineer

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