After rebooting the PC with the printer disconnected, the entries were gone. Upon reconnecting the printer via Ethernet, TDE somehow detected it and recreated the entry in the TCC, but the entry didn't work with a test page. Adding the printer back via Ethernet using HPLIP, recreated the printer entry with the IP address and a test page worked. At this point, Vivaldi and Chromium will only print in color, if I select the system dialog to print, choosing the printer with the IP address, as there are now three entries listed for this one printer. If I use their native printing options, they continue to print in grayscale. -- Linux. A Continual Learning Experience. TDE: R14.0.11-pre - Debian: 11 (amd64)

On 9/5/21 1:02 PM, Thierry de Coulon wrote: Hi Thierry, I have since learned that the current version if HPLIP is incompatible with Debian 11, but there are new packages pending in the pipeline. What has been occurring, is really strange. The current version of HPLIP will connect the printer to the PC but only via Ethernet. Once this occurs, it is the only printer that Vivaldi and Chromium can see, aside from 'Print to PDF'. If I use the native print option in these browsers, the pages print in grayscale. If I select to use the system printing dialog (which is what Firefox and Thunderbird use), they will then print in color. There is a second entry for the printer in the TDE Control Panel, created by TDE, apparently automatically installed, consisting of the printer model with alphanumeric characters next to it, referencing that it's driverless, using cups-filters 1.28,7. This entry is created whether the printer is connected via USB or Ethernet. If I delete it, it reappears automatically. If the printer entry with the Ethernet connection is removed, leaving only this driverless entry, Vivaldi and Chromium do not see it. 'Print to PDF' is the only option with those browsers. -- Linux. A Continual Learning Experience. TDE: R14.0.11-pre - Debian: 11 (amd64)