Red Hat Bugzilla – Bug 996661
Printers missing from printer discovery list
Last modified: 2013-08-19 16:18:36 EDT
If more than one printer of a given model is discovery by CUPS, control-center chooses to display only *one* of them.
As described in the upstream bug, you don't have to buy a matching pair of printers to test this. You can do it with a simple shell script like this in
socket socket://127.0.0.1:9100 "foo1" "bar1" "MDL:HP LaserJet M5035 MFP" "left"
socket socket://127.0.0.2:9100 "foo2" "bar2" "MDL:HP LaserJet M5035 MFP" "right"
The code in pp-new-printer-dialog.c appears to be almost completely uncommented but it looks like the problem might actually be with the GroupPhysicalDevices method in system-config-printer.
The two devices of the same type are grouped together in the response:
And this appears to make the dialog ignore all but the first.
"socket" is not a valid device class (first field). I think you want 'network' there?
Doh! That makes it work much better — thanks!
Now I have the opposite problem. If I add one of these "discovered" printers, and then go to add another, the original one that I already added is still there. The control-center code was trying to filter those out, wasn't it?
(In reply to David Woodhouse from comment #3)
> Now I have the opposite problem. If I add one of these "discovered"
> printers, and then go to add another, the original one that I already added
> is still there. The control-center code was trying to filter those out,
> wasn't it?
control-center doesn't try to filter already added printers out. It keeps them there because user might want to have the same printer with different settings.
Makes sense; thanks for the update.
I have all this working fairly nicely now. Apart from the PIN-based secure printing, which works kind of sporadically. qv.