** Description changed:
The transition from Python2 to Python3, the replacement of the
OpenPrinting web server by a new VM running Ubuntu 12.04 instead of
10.04 (which was done bevause the old VM was completely overloaded and
so contributed a part of the inability to auto-install drivers), and
code restructuring in system-config-printer has broken automatic driver
package download at several points. This is now fixed in the Vivid
package of system-config-printer but (at least part) of the fixes needs
to get backported to Utopic and Trusty, for which I have posted this bug
report.
[Impact]
With the OpenPrinting web server change (Utopic, Trusty) and the
transition to Python3 (Utopic) automatic driver download stopped
working. So users of Utopic and Trusty who connect a printer only
supported by a downloadable driver package listed at OpenPrinting
(mostly newer Epson inkjets but also new PostScript/PCL printers from
Ricoh and OEM, Samsung, ...) will not get the correct driver letting the
printer not work at all or work with an inferior generic driver.
[Test Case]
If you do not have one of the mentioned printers, create a file named
/usr/lib/cups/backend/testbackend containing the line
echo 'direct usb://EPSON/EP-801A "EPSON EP-801A" "EPSON EP-801A"
"MFG:EPSON;CMD:ESCPL2,BDC,D4,D4PX,ESCPR2;MDL:EP-
801A;CLS:PRINTER;DES:EPSON EP-801A;" ""'
- and make iot world-readable and -executable:
+ and make it world-readable and -executable:
sudo chmod a+rx /usr/lib/cups/backend/testbackend
This emulates an Epson EP-801A printer on USB, at least for CUPS'
printer discovery facility.
Start system-config-printer and click the "Add" button. In the printer
setup wizard choose the Epson EP-801A under the detected printers. There
will pop up "Searching driver" messages several times but in the end the
manual make/model/driver selection screen appears as system-config-
printer was not able to find a driver for this printer.
With the proposed packages for Utopic and Trusty a driver is find via
OpenPrinting ("epson-escpr") and offered for download. Accepting this
leads to the driver being installed (and the Debian package repository
at Epson being locally registered for future updates by Ubuntu's update
mechanism) and afterwards automatically being assigned to the new print
queue. The user is only asked for setting the queue name and comments
before the wizard completes.
[Regression Potential]
Regression potential is low, as the fix consists of several small,
independent changes, and most of them are not hit if the newly added
printer is supported by a locally available driver.
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https://bugs.launchpad.net/bugs/1401835
Title:
system-config-printer does not automatically download and install
printer driver packages any more
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