[Ubuntu Wiki] Update of "DebuggingPrintingProblems" by till-kamppeter

[Ubuntu Wiki]

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The following page has been changed by till-kamppeter:
http://wiki.ubuntu.com/DebuggingPrintingProblems?action=diff&rev1=53&rev2=54

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   5. Press Ctrl-C to stop the logging.
   6. Check whether the printer gets correctly detected by the USB subsystem and determine its USB vendor/product IDs and the USB bus and device addresses: <<BR>> {{{$ lsusb}}} <<BR>> Note: The USB bus and device addresses change if you turn off or unplug the printer. Please re-run this command if needed.
   7. Check whether the device files for the printer get created and the ownerships ("root lp") and permissions (non-HP: "crw-rw-r--", HP: "crw-rw-r--+") correctly set: <<BR>> {{{$ ls -l /dev/usb/lp* /dev/bus/usb/*/*}}}
-  8. Determine the printer's device ID strings: <<BR>> {{{$ sudo usb_deviceid /dev/usb/lp0}}} <<BR>> {{{$ sudo usb_deviceid /dev/usb/lp1}}} <<BR>> {{{...}}} <<BR>> For HP printers also use <<BR>> {{{$ hp-info -i}}} <<BR>> and choose the printer with the problem from the text menu, then copy the "deviceid" entry from the output (can be several lines)
+  8. Determine the printer's device ID strings: <<BR>> {{{$ sudo usb_deviceid /dev/usb/lp0}}} <<BR>> {{{$ sudo usb_deviceid /dev/usb/lp1}}} <<BR>> {{{...}}} <<BR>> For HP printers also use <<BR>> {{{$ hp-info -i}}} <<BR>> and choose the printer with the problem from the text menu, then copy the "deviceid" entry from the output (can be several lines).
+  9. For HP printers: Check whether HPLIP connects to them: <<BR>> {{{$ hp-makeuri <Bus>:<Device>}}} <BR> Replace "<Bus>" and "<Device>" by the bus and device numbers from the "lsusb" output (not vendor and product ID). The numbers must be supplied with three digits, zero-padded from the left, like "008:015".
   9. Find out if your printer gets detected by CUPS: <<BR>> {{{$ lpinfo -v}}}
   10. Attach the output of the above commands to the bug report.
+ 
+ Note that problems cannot only caused by CUPS but also by the kernel (package "linux"), libusb, HPLIP (package "hplip"), and several third-party printer drivers.
  
  == Parallel port printer ==
  
@@ -33, +36 @@

   3. Check if the kernel detected the parallel port during bootup: <<BR>> {{{$ dmesg | grep par }}}
   4. Find out if your printer gets detected by CUPS: <<BR>> {{{$ lpinfo -v}}}
   5. Attach the output of the above commands to the bug report.
+ 
+ Note that problems cannot only caused by CUPS but also by the kernel (package "linux"), HPLIP (package "hplip"), and several third-party printer drivers.
  
  = CUPS web interface =