HP Deskjet 6122 Color Inkjet Printer - Manual (Page 107)

automatic paper-type option is enabled
When the automatic paper-type option is enabled, it takes a few seconds for the printer
to scan the first page of the print job to determine the appropriate paper type.
To increase the print speed, turn off the Automatic Paper-Type Sensor.
For instructions on turning off the Automatic Paper-Type Sensor, see using the
automatic paper-type sensor .
two-sided documents are printing
Printing two-sided documents takes more time than printing single-sided documents.
printer driver is outdated
An outdated printer driver may be installed.
For information about updating the printer driver, click here .
computer does not meet system requirements
1. Verify that the computer's hard disk space, RAM, and processor speed meet
system requirements.
For more information, see system requirements .
2. Increase free space on the hard drive.
If your computer does not have enough RAM, or a large amount of free space on
the hard drive, the printer processing time will be longer.