Hello. I have recently installed my HP DeskJet 3820 on RedHat 8.0. When I go into CUPS it has no problem adding the printer. I have the correct drivers for it. When I try to print a test page nothing happens so I set the log level to DEBUG and I took a look at the error.log file to see if I could figure out the problem.

Here is the output from the error.log file. I have put an arrow next to the lines that I thought could be an indication of the problem.

D [20/Jan/2003:21:18:18 -0500] ReadClient() 5 GET /printers/DeskJet3820?op=print-test-page HTTP/1.1
D [20/Jan/2003:21:18:18 -0500] CGI /usr/lib/cups/cgi-bin/printers.cgi started - PID = 2877
I [20/Jan/2003:21:18:18 -0500] Started "/usr/lib/cups/cgi-bin/printers.cgi" (pid=2877)
D [20/Jan/2003:21:18:18 -0500] SendCommand() 5 file=7
-> D [20/Jan/2003:21:18:19 -0500] AcceptClient() 6 from localhost:631.
D [20/Jan/2003:21:18:19 -0500] ReadClient() 6 POST /printers/DeskJet3820 HTTP/1.1
D [20/Jan/2003:21:18:19 -0500] print_job: request file type is application/postscript.
D [20/Jan/2003:21:18:19 -0500] check_quotas: requesting-user-name = ''
D [20/Jan/2003:21:18:19 -0500] print_job: requesting-user-name = ''
D [20/Jan/2003:21:18:19 -0500] Adding default job-sheets values "none,none"...
I [20/Jan/2003:21:18:19 -0500] Job 29 queued on 'DeskJet3820' by ''.
D [20/Jan/2003:21:18:19 -0500] Job 29 hold_until = 0
D [20/Jan/2003:21:18:19 -0500] StartJob(29, 0x8091938)
D [20/Jan/2003:21:18:19 -0500] StartJob() id = 29, file = 0/1
D [20/Jan/2003:21:18:19 -0500] job-sheets=none,none
D [20/Jan/2003:21:18:19 -0500] banner_page = 0
D [20/Jan/2003:21:18:19 -0500] StartJob: argv = "DeskJet3820","29","","Test Page","1","","/var/spool/cups/d00029-001"
D [20/Jan/2003:21:18:19 -0500] StartJob: envp = "PATH=/usr/lib/cups/filter:/bin:/usr/bin","SOFTWARE=CUPS/1.1","USER=root","CHARSET=iso-8859-1","LANG=en","","PPD=/etc/cups/ppd/DeskJet3820.ppd","CUPS_SERVERROOT=/etc/cups","RIP_MAX_CACHE=8m","TMPDIR=/var/spool/cups/tmp","CONTENT_TYPE=application/postscript","DEVICE_URI=parallel:/dev/lp0","PRINTER=DeskJet3820","CUPS_DATADIR=/usr/share/cups","CUPS_FONTPATH=/usr/share/cups/fonts","","",""
D [20/Jan/2003:21:18:19 -0500] StartJob: statusfds = 8, 9
D [20/Jan/2003:21:18:19 -0500] StartJob: filterfds[1] = 10, -1
D [20/Jan/2003:21:18:19 -0500] StartJob: filter = "/usr/lib/cups/filter/pstops"
D [20/Jan/2003:21:18:19 -0500] StartJob: filterfds[0] = 11, 12
D [20/Jan/2003:21:18:19 -0500] start_process("/usr/lib/cups/filter/pstops", 0xbfff1450, 0xbfff0900, 10, 12, 9)
I [20/Jan/2003:21:18:19 -0500] Started filter /usr/lib/cups/filter/pstops (PID 2878) for job 29.
D [20/Jan/2003:21:18:19 -0500] StartJob: filter = "/usr/lib/cups/filter/cupsomatic"
D [20/Jan/2003:21:18:19 -0500] StartJob: filterfds[1] = 10, 13
D [20/Jan/2003:21:18:19 -0500] start_process("/usr/lib/cups/filter/cupsomatic", 0xbfff1450, 0xbfff0900, 11, 13, 9)
I [20/Jan/2003:21:18:19 -0500] Started filter /usr/lib/cups/filter/cupsomatic (PID 2879) for job 29.
D [20/Jan/2003:21:18:19 -0500] StartJob: backend = "/usr/lib/cups/backend/parallel"
D [20/Jan/2003:21:18:19 -0500] StartJob: filterfds[0] = -1, 11
D [20/Jan/2003:21:18:19 -0500] start_process("/usr/lib/cups/backend/parallel", 0xbfff1450, 0xbfff0900, 10, 11, 9)
I [20/Jan/2003:21:18:19 -0500] Started backend /usr/lib/cups/backend/parallel (PID 2880) for job 29.
D [20/Jan/2003:21:18:19 -0500] ProcessIPPRequest: 6 status_code=0
D [20/Jan/2003:21:18:19 -0500] CloseClient() 6
D [20/Jan/2003:21:18:19 -0500] [Job 29] Page = 612x792; 0,0 to 612,792
D [20/Jan/2003:21:18:19 -0500] [Job 29] 0 %%BoundingBox: 0 0 612 792
D [20/Jan/2003:21:18:19 -0500] [Job 29] 0 %%Pages: 1
D [20/Jan/2003:21:18:19 -0500] [Job 29] 0 %%LanguageLevel: 1
D [20/Jan/2003:21:18:19 -0500] [Job 29] 0 %%DocumentData: Clean7Bit
D [20/Jan/2003:21:18:19 -0500] [Job 29] 0 %%DocumentSuppliedResources: procset testprint/1.0
D [20/Jan/2003:21:18:19 -0500] [Job 29] 0 %%DocumentNeededResources: font Helvetica Helvetica-Bold Times-Roman
D [20/Jan/2003:21:18:19 -0500] [Job 29] 0 %%Creator: Michael Sweet, Easy Software Products
D [20/Jan/2003:21:18:19 -0500] [Job 29] 0 %%CreationDate: May 11, 1999
D [20/Jan/2003:21:18:19 -0500] [Job 29] 0 %%Title: Test Page
D [20/Jan/2003:21:18:19 -0500] [Job 29] 0 %%EndComments
D [20/Jan/2003:21:18:19 -0500] [Job 29] 0 %%BeginProlog
D [20/Jan/2003:21:18:19 -0500] [Job 29] 0 %%BeginResource procset testprint 1.1 0
D [20/Jan/2003:21:18:19 -0500] [Job 29] 0 %%EndResource
D [20/Jan/2003:21:18:19 -0500] [Job 29] 0 %%EndProlog
D [20/Jan/2003:21:18:19 -0500] [Job 29] 0 %%Page: 1 1
D [20/Jan/2003:21:18:19 -0500] [Job 29] 0 %%Page: 1 1
D [20/Jan/2003:21:18:19 -0500] [Job 29] pw = 612.0, pl = 792.0
D [20/Jan/2003:21:18:19 -0500] [Job 29] PageLeft = 0.0, PageRight = 612.0
D [20/Jan/2003:21:18:19 -0500] [Job 29] PageTop = 792.0, PageBottom = 0.0
D [20/Jan/2003:21:18:19 -0500] [Job 29] PageWidth = 612.0, PageLength = 792.0
-> D [20/Jan/2003:21:18:19 -0500] [Job 29] perl: warning: Setting locale failed.
-> D [20/Jan/2003:21:18:19 -0500] [Job 29] perl: warning: Please check that your locale settings:
D [20/Jan/2003:21:18:19 -0500] [Job 29] LANGUAGE = (unset),
D [20/Jan/2003:21:18:19 -0500] [Job 29] LC_ALL = (unset),
D [20/Jan/2003:21:18:19 -0500] [Job 29] LANG = "en"
-> D [20/Jan/2003:21:18:19 -0500] [Job 29] are supported and installed on your system.
-> D [20/Jan/2003:21:18:19 -0500] [Job 29] perl: warning: Falling back to the standard locale ("C").
D [20/Jan/2003:21:18:19 -0500] [Job 29] Cupsomatic backend version $Revision: 2.13 $ running...
D [20/Jan/2003:21:18:19 -0500] [Job 29] ppd=/etc/cups/ppd/DeskJet3820.ppd
D [20/Jan/2003:21:18:19 -0500] [Job 29] Seaerching job for option settings ...
D [20/Jan/2003:21:18:19 -0500] [Job 29] Found: %%BeginFeature: *Resolution 300ColorCMYK
D [20/Jan/2003:21:18:19 -0500] [Job 29] Option: Resolution=300ColorCMYK --> Setting option
D [20/Jan/2003:21:18:19 -0500] [Job 29] Found: %% FoomaticOpt: Resolution=300ColorCMYK
D [20/Jan/2003:21:18:19 -0500] [Job 29] Option: Resolution=300ColorCMYK --> Setting option
D [20/Jan/2003:21:18:19 -0500] [Job 29] Found: %%BeginFeature: *PageSize Letter
D [20/Jan/2003:21:18:19 -0500] [Job 29] Option: PageSize=Letter --> Setting option
D [20/Jan/2003:21:18:19 -0500] [Job 29] Found: %% FoomaticOpt: PageSize=Letter
D [20/Jan/2003:21:18:19 -0500] [Job 29] Option: PageSize=Letter --> Setting option
D [20/Jan/2003:21:18:19 -0500] [Job 29] Found: %%BeginFeature: *Duplex None
D [20/Jan/2003:21:18:19 -0500] [Job 29] Option: Duplex=None --> Setting option
D [20/Jan/2003:21:18:19 -0500] [Job 29] Found: %% FoomaticOpt: Duplex=None
D [20/Jan/2003:21:18:19 -0500] [Job 29] Option: Duplex=None --> Setting option
D [20/Jan/2003:21:18:19 -0500] [Job 29] 0 %%EOF
D [20/Jan/2003:21:18:19 -0500] [Job 29] Saw EOF!
D [20/Jan/2003:21:18:19 -0500] [Job 29] /usr/lib/cups/filter/cupsomatic: inserted option PS code:
D [20/Jan/2003:21:18:19 -0500] [Job 29] gs PID pid2=2882
D [20/Jan/2003:21:18:19 -0500] [Job 29] gs command: gs -q -dBATCH -dPARANOIDSAFER -dQUIET -dNOPAUSE -sDEVICE=ijs -sIjsServer=hpijs -sDeviceManufacturer="HEWLETT-PACKARD" -sDeviceModel="DESKJET 3820" -dDEVICEWIDTHPOINTS=612 -dDEVICEHEIGHTPOINTS=792 -dDuplex=false -r300 -sIjsParams=Quality:Quality=0,Quality:ColorMode=2,Quality:MediaType=0,Quality:PenSet=2 -dIjsUseOutputFD -sOutputFile=- -
-> D [20/Jan/2003:21:18:19 -0500] [Job 29] perl: warning: Setting locale failed.
-> D [20/Jan/2003:21:18:19 -0500] [Job 29] perl: warning: Please check that your locale settings:
D [20/Jan/2003:21:18:19 -0500] [Job 29] LANGUAGE = (unset),
D [20/Jan/2003:21:18:19 -0500] [Job 29] LC_ALL = (unset),
D [20/Jan/2003:21:18:19 -0500] [Job 29] LANG = "en"
-> D [20/Jan/2003:21:18:19 -0500] [Job 29] are supported and installed on your system.
-> D [20/Jan/2003:21:18:19 -0500] [Job 29] perl: warning: Falling back to the standard locale ("C").
D [20/Jan/2003:21:18:19 -0500] [Job 29] foomatic-gswrapper: gs '-dBATCH' '-dPARANOIDSAFER' '-dQUIET' '-dNOPAUSE' '-sDEVICE=ijs' '-sIjsServer=hpijs' '-sDeviceManufacturer=HEWLETT-PACKARD' '-sDeviceModel=DESKJET 3820' '-dDEVICEWIDTHPOINTS=612' '-dDEVICEHEIGHTPOINTS=792' '-dDuplex=false' '-r300' '-sIjsParams=Quality:Quality=0,Quality:ColorMode=2,Quality:MediaType=0,Quality:PenSet=2' '-dIjsUseOutputFD' '-sOutputFile=/dev/fd/3' '/dev/fd/0' 3>&1 1>&2
D [20/Jan/2003:21:18:19 -0500] [Job 29] Unknown device: ijs
D [20/Jan/2003:21:18:19 -0500] [Job 29] Couldn't exec foomatic-gswrapper -q -dBATCH -dPARANOIDSAFER -dQUIET -dNOPAUSE -sDEVICE=ijs -sIjsServer=hpijs -sDeviceManufacturer="HEWLETT-PACKARD" -sDeviceModel="DESKJET 3820" -dDEVICEWIDTHPOINTS=612 -dDEVICEHEIGHTPOINTS=792 -dDuplex=false -r300 -sIjsParams=Quality:Quality=0,Quality:ColorMode=2,Quality:MediaType=0,Quality:PenSet=2 -dIjsUseOutputFD -sOutputFile=- - at /usr/lib/cups/filter/cupsomatic line 1097.
D [20/Jan/2003:21:18:19 -0500] [Job 29] tail process done writing data to *main::STDOUT
D [20/Jan/2003:21:18:19 -0500] [Job 29] KID4 finished
D [20/Jan/2003:21:18:19 -0500] [Job 29] error closing *main::KID3 at /usr/lib/cups/filter/cupsomatic line 892, <STDIN> line 557.
E [20/Jan/2003:21:18:19 -0500] PID 2879 stopped with status 32!
D [20/Jan/2003:21:18:19 -0500] UpdateJob: job 29, file 0 is complete.
D [20/Jan/2003:21:18:19 -0500] CancelJob: id = 29
D [20/Jan/2003:21:18:19 -0500] StopJob: id = 29, force = 0
D [20/Jan/2003:21:18:19 -0500] StopJob: printer state is 3
D [20/Jan/2003:21:19:28 -0500] CloseClient() 5
D [20/Jan/2003:21:22:29 -0500] CloseClient() 3

Anybody know what these lines mean?

Have you installed the cups client? you need this to print from your programs (took me 3 hours af headache to find out )

If it is not installed by default then no I have not installed it. How do you do that?

If you have apt-get installed you can do:
apt.get install cupsys-client
If you don't, search for the package cupsys-client (or maybe cups-client)