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Duplex printing may not work correctly with HP LaserJet printers on Red Hat Enterprise Linux

Solution Verified - Updated 2014-11-07T22:52:19+00:00 -

Issue

Duplex printing may not work correctly with Some HP LaserJet printers on Red Hat Enterprise Linux.
- Duplex printing with the a2ps command works correctly
- gedit prints the first page simplex and the rest of the pages duplex
- Adobe Reader prints only in simplex
- Evince prints correctly
By default, printers are printing one side only. To print both sides following options were enabled, however this option is not working:
```
lpoptions -d PHKGJPMF21Q51 -o sides=two-sided-long-edge
```

Environment

Red Hat Enterprise Linux 5 & 6
Common Unix Printing System (CUPS) 1.3.7 & 1.4.2

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