Fedora 20 network printer refuses to print - how to debug?
I have a Brother printer on the LAN, set up normally using a manual URL and the "ipp" protocol at ipp://192.x.x.x.
The selected printer driver is the "foomatic" printer driver (there is also the BRN one)
The printer management dialog seems to indicate the printer can be contacted; it says "toner low (black)", which is correct, although the bars underneath are all at 0, which can't be right.
Printing a document or a test page or even telling the printer to print a self-test page all fail, even after deleting the printer entry and reconfiguring it anew. I know this used to work a couple of weeks ago.
When I print form Windows 7 running in a KVM on this Fedora 20 laptop, I do not encounter any problem whatsoever (the quality is also incomprably better relative to the output from the Fedora system, sadly, because the output is badly rasterized on Linux).
Where do I start the debugging to find out what is keeping Fedora from telling the printer what to do?
There is a page on Wiki about debug printing problems, read it and see if helps.
Did you try the drivers provided by Brother? I remember I had some problems with ipp, so I tried socket://ip.of.printer:9100 and had no problems any more.