Hi
I did some research on the Dell UP3214Q and found an interesting review on AnandTech*. One thing mentioned is that there is a firmware update for the UP3214Q and it is also mentioned in a thread on the Dell Support site. Would it be possible for you to verify that you have the latest firmware on your UP3214Q with Dell Customer Support? The FW revision will be written on the back of your monitor next to the serial number. A01 is the updated firmware.
AnandTech | Dell UP3214Q Review
http://en.community.dell.com/support-forums/peripherals/f/3529/p/19536443/20582043.aspx
Thanks
Robert