I have the same problem with HP Color Laserjet 2550L -- it is connected to the Synology DS-209 NAS which served as print server and works with Windows 7/XP well with color printout. However, it only prints in grey in Edubuntu 12.04 LTS.
The foomatic-filter is 4.0.16-0ubuntu0.2 and cups version is 1.5.3-0ubuntu6. The printer once can print in color but it lost this ability after version updated.
Please check my error_log generated when I printed the test page.
I have the same problem with HP Color Laserjet 2550L -- it is connected to the Synology DS-209 NAS which served as print server and works with Windows 7/XP well with color printout. However, it only prints in grey in Edubuntu 12.04 LTS.
The foomatic-filter is 4.0.16-0ubuntu0.2 and cups version is 1.5.3-0ubuntu6. The printer once can print in color but it lost this ability after version updated.
Please check my error_log generated when I printed the test page.