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    Unable to install printer

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    • S
      Sebastian Roth Moderator
      last edited by

      @tatanas said in Unable to install printer:

      How Fog client checks if a printer is already installed ?

      Check out this part of the fog-client code: https://github.com/FOGProject/fog-client/blob/85da019cbd8a939e69fea42779f1bc53b06323cb/Modules/PrinterManager/PrinterManager.cs#L81

      Web GUI issue? Please check apache error (debian/ubuntu: /var/log/apache2/error.log, centos/fedora/rhel: /var/log/httpd/error_log) and php-fpm log (/var/log/php*-fpm.log)

      Please support FOG if you like it: https://wiki.fogproject.org/wiki/index.php/Support_FOG

      T 1 Reply Last reply Reply Quote 0
      • Matthieu JacquartM
        Matthieu Jacquart @tatanas
        last edited by

        @tatanas Hi, it looks like same problem I’m facing since few month too, no workaround for now…
        https://forums.fogproject.org/topic/15185/problem-mapping-network-printer-after-upgrade-to-1-5-9-60?_=1631803438100
        Matthieu

        Fog 1.5.9.138
        Debian 11
        Vmware ESXi

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        • T
          tatanas @Sebastian Roth
          last edited by tatanas

          @sebastian-roth
          Don’t hesitate if you need help debugging.
          I’m using the module a lot and this bug is very frustating…

          @Matthieu-Jacquart
          The bug was there in 1.5.8 too and I think it wasn’t before.

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          • T
            tatanas
            last edited by tatanas

            So it seems the list “_configuredPrinters” contains the printer that I want to install.
            Is it the host’s printers list configured through the fog server web ?
            And the “installedPrinters” list will be the printers already installed on the host ?

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            • T
              tatanas
              last edited by tatanas

              I can understand “…already exists” but what does “… already configured” mean ?

              Here is a sample of the log when I try to install a printer which is not already installed on the host :

               22/09/2021 15:58 PrinterManager Adding printers
               22/09/2021 15:58 Printer Adding: B503-LASER (fog)
               22/09/2021 15:59 PrinterManager PrintUI return code = 0
               22/09/2021 15:59 PrinterManager Restarting spooler
              
              ...
              
               22/09/2021 16:02 PrinterManager Adding printers
               22/09/2021 16:02 PrinterManager B503-LASER (fog) has already been configured
              
              ...
              
               22/09/2021 16:04 PrinterManager Adding printers
               22/09/2021 16:04 PrinterManager B503-LASER (fog) has already been configured
              

              I you want, I can give you a remote access to this computer.

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              • T
                tatanas
                last edited by tatanas

                More details :
                I tried adding 2 Fog managed printers and the ports are created (IP_X.X.X.X with the associated IP) but not the printers.
                I would say the printui method (even if return code is 0) is not working properly.

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                • S
                  Sebastian Roth Moderator
                  last edited by Sebastian Roth

                  @tatanas Finally I found some time to look into this in more depth. Most of the fog-client code came from Joe who is not actively working on this project anymore. While I try to fix things in the fog-client as much as I can I don’t know it well.

                  As far as I understand things the problem might occour because _configuredPrinters is an internal list the fog-client keeps to know which printer was configured earlier already to skip that on the next loop. But obviously a situation can arise where the rundll32 PrintUI calls return but still the printer is not setup correctly. In that case the fog-client code add it to its internal list of _configuredPrinters and won’t try to configure it until you restart the fog-client service (FOGService in Windows service managment).

                  So what we need to find out is why this part is not working as it should: https://github.com/FOGProject/fog-client/blob/master/Modules/PrinterManager/Windows/WindowsPrinterManager.cs#L124

                  Web GUI issue? Please check apache error (debian/ubuntu: /var/log/apache2/error.log, centos/fedora/rhel: /var/log/httpd/error_log) and php-fpm log (/var/log/php*-fpm.log)

                  Please support FOG if you like it: https://wiki.fogproject.org/wiki/index.php/Support_FOG

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                  • T
                    tatanas @Sebastian Roth
                    last edited by

                    @sebastian-roth We need detailed log of printui command result.
                    The command in the client code is the same I have used to test from command line (test was ok), so it’s strange it doesn’t work.

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                    • S
                      Sebastian Roth Moderator
                      last edited by

                      @tatanas Maybe there is some message in the Windows event log? Just a quick idea from the top of my head. I will try to find some time to help you on getting fog-client compiled soon as well.

                      Web GUI issue? Please check apache error (debian/ubuntu: /var/log/apache2/error.log, centos/fedora/rhel: /var/log/httpd/error_log) and php-fpm log (/var/log/php*-fpm.log)

                      Please support FOG if you like it: https://wiki.fogproject.org/wiki/index.php/Support_FOG

                      T 1 Reply Last reply Reply Quote 0
                      • T
                        tatanas @Sebastian Roth
                        last edited by

                        @sebastian-roth I checked Windows event log (spooler log) and didn’t find anything regarding the printer installation.
                        Thanks for your time.

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                        • T
                          tatanas
                          last edited by

                          Ok, thanks to you I can build the Fog Client (https://forums.fogproject.org/topic/15757/fog-client-build).
                          I would like to log the result of the printui command in WindowsPrinterManager.cs at line 41.
                          I added “> c:\printui.log” but it doesn’t work.

                          using (var proc = Process.Start("rundll32.exe", $" printui.dll,PrintUIEntry {cmdLine} > c:\\printui.log"))
                          

                          I don’t know C# so I suppose I could use a method to get Standard Output ?

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                          • S
                            Sebastian Roth Moderator
                            last edited by

                            @tatanas This answer on stackoverflow looks promising: https://stackoverflow.com/a/18529868

                            Web GUI issue? Please check apache error (debian/ubuntu: /var/log/apache2/error.log, centos/fedora/rhel: /var/log/httpd/error_log) and php-fpm log (/var/log/php*-fpm.log)

                            Please support FOG if you like it: https://wiki.fogproject.org/wiki/index.php/Support_FOG

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                            • T
                              tatanas @Sebastian Roth
                              last edited by tatanas

                              @sebastian-roth Here are the changes I made in the WindowsPrinterManager.cs at line 41:

                              using (Process proc = new Process())
                              {
                              	proc.StartInfo.FileName = "rundll32.exe";
                              	proc.StartInfo.Arguments = $" printui.dll,PrintUIEntry {cmdLine}";
                                      proc.StartInfo.RedirectStandardOutput = true;
                              	proc.StartInfo.UseShellExecute = false;
                              	proc.Start();
                              	var output = proc.StandardOutput.ReadToEnd();
                              	proc.WaitForExit(30*1000);
                              
                                      if (proc.HasExited)
                                      {
                                            Log.Entry(LogName, "PrintUI return code = " + proc.ExitCode);
                              	      Log.Entry(LogName, "PrintUI Output = " + output);
                                      }
                                      else
                                      {
                                            Log.Entry(LogName, "PrintUI has not finished in a timely fashion, abandoning process");
                                      }
                              }
                              

                              replacing

                              using (var proc = Process.Start("rundll32.exe", $" printui.dll,PrintUIEntry {cmdLine}"))
                              {
                              ...
                              }
                              

                              Unfortunatly, printui does not return anything…

                              Logging the “cmdLine” variable returns this when the first installation attempts:

                              cmdLine = /if /b "B503-LASER (fog)" /f "\\@IP_NAS\applications\Imprimantes\HP_LJ_M401\hpcm401u.inf" /r "IP_X.X.X.X" /m "HP LaserJet 400 M401 PCL 6" /q
                              

                              After that, cmdLine is not used anymore and we’ve got “already configured”.
                              I never pass in the procedure

                              public override void Configure(Printer printer, bool verbose = false)
                              {
                              ...
                              }
                              
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                              • T
                                tatanas
                                last edited by

                                I made some tests. The same printui command in local works fine.
                                So if it’s working in local it should works with fog client which means the added printer is removed/deleted from the host as soon as it’s installed ? It could explain why we can’t see the printer in the host list and why fog client says it’s already configured.

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                                • T
                                  tatanas
                                  last edited by tatanas

                                  Last news :

                                  • The script never goes in the “Remove” method, so my last suggestion is wrong.
                                  • I made a mistake about the “Configure” method. It is going into this method but it passes into
                                  if (string.IsNullOrEmpty(printer.ConfigFile)) return;
                                  

                                  and never execute

                                  PrintUI($"/Sr /n \"{printer.Name}\" /a \"{printer.ConfigFile}\" m f g p", verbose);
                                  

                                  EDIT : it is the same behaviour on a computer without problem… I’m lost 🙂

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                                  • S
                                    Sebastian Roth Moderator
                                    last edited by

                                    @tatanas said in Unable to install printer:

                                    I never pass in the procedure
                                    public override void Configure(Printer printer, bool verbose = false)

                                    Can you please explain what you mean by that?

                                    Web GUI issue? Please check apache error (debian/ubuntu: /var/log/apache2/error.log, centos/fedora/rhel: /var/log/httpd/error_log) and php-fpm log (/var/log/php*-fpm.log)

                                    Please support FOG if you like it: https://wiki.fogproject.org/wiki/index.php/Support_FOG

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                                    • T
                                      tatanas @Sebastian Roth
                                      last edited by

                                      @sebastian-roth Sorry I made a mistake, like I said in my previous post, the “Configure” method is called but does nothing (always enter the second “if”).

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                                      • T
                                        tatanas
                                        last edited by

                                        This problem is very strange.
                                        I was testing on a win7 computer which can’t install printers (fog client 0.12).
                                        I push a old fog image on it and with the same 0.12 client, it now works.
                                        It is not really up to date and the problem appears on win10 too (different version).

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                                        • S
                                          Sebastian Roth Moderator
                                          last edited by

                                          @tatanas Maybe the changes that came when MS fixed the printer nightmare issue is causing the problem.

                                          Web GUI issue? Please check apache error (debian/ubuntu: /var/log/apache2/error.log, centos/fedora/rhel: /var/log/httpd/error_log) and php-fpm log (/var/log/php*-fpm.log)

                                          Please support FOG if you like it: https://wiki.fogproject.org/wiki/index.php/Support_FOG

                                          george1421G 1 Reply Last reply Reply Quote 0
                                          • george1421G
                                            george1421 Moderator @Sebastian Roth
                                            last edited by

                                            @sebastian-roth said in Unable to install printer:

                                            Maybe the changes that came when MS fixed the printer nightmare issue

                                            I had to deal with this last week on my campus. (TBH I only skimmed this thread, so this may be a bit off point). The windows accumulative patch for September for both the servers and workstations broke printing for me on the older legacy systems. If you have a currently supported and fully patch version of 2012, 2016, 2019, or what ever is being patched on windows 10 printing worked normally. If you had anything less than 2012 or unpatched win10 or less the users could not print to a current windows print server or install new printers.

                                            It appears in the sept patch MS turned on encrypted communications on the print spooler. I can’t find the article I found at the moment but the workaround is to disable the encryption using the registry key here: https://borncity.com/win/2021/09/20/windows-september-2021-update-workaround-fr-druckprobleme/ Look at the post by Benjamin. I’m not saying this is your problem here with the fog client, but setting this registry value to 0 will allow legacy windows devices to print to contemporary windows print spoolers.

                                            Please help us build the FOG community with everyone involved. It's not just about coding - way more we need people to test things, update documentation and most importantly work on uniting the community of people enjoying and working on FOG!

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