From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4.1) Gecko/20031030 Description of problem: I use default cups from Fedora Core 1, and I try to print a test page using 2 printer, 1 HP Deskjet 845c and HP LaserJet 1000. I try HPLJ 1000, and they always said media tray empty, that is silly, the paper is in the tray. I try HP 845c, same, cannot print, but when i change to 895c, the test work, but when I try to print. using gedit, the paper is not working, cannot print to it. Several people in the chat room said, must install from source. I think this is not a good statement. I can guarrantee the USB is work well, but I think there is a bugs also in USB driver, if the cups is stable. Version-Release number of selected component (if applicable): cups-default How reproducible: Always Steps to Reproduce: 1. run redhat-config-printer 2. select printer 3. click test cups page Actual Results: cannot print, and the error is media tray empty Expected Results: test page show up Additional info:
'media tray empty' is a kernel bug.
This has to be resolved down to results of "cat > /dev/usb/lp0" and its results, or an strace output before I can figured it out.
Hmm, I retract comment #1 -- while I had always been led to believe that it was a kernel bug, it turned out to be a misinterpretation of status bits on the part of the CUPS USB backend. However, the 'media tray empty' message is harmless and does not cause any other symptom.