Panasonic PT-EZ580 Operating Instructions Manual page 148

f If connecting the projector to a computer that uses an early-type chipset or graphics card compatible with DisplayPort, the projector or
computer may not be operated properly when the signal output from DisplayPort on the computer is input to the projector. In such a case,
switch off the projector or computer and then switch it on.
If the signal output from DisplayPort is input to the projector, use of the computer equipped with the latest chipset or graphics card is
recommended.
(Only for PT-EZ580, PT-EW640 and PT-EX610)
148 - ENGLISH
Chapter 6 Appendix — Technical information