Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I am thinking about buying a DVI splitter cable online and a DVI-> HDMI adapter. Can i use these to clone my graphic cards output so one can go to my monitor, and the other to my projector?

Can anyone think of any issues with using the adapter like this? Would there be problems with signal loss or anything?


share|improve this question
as it turns out there was an EDID clash error that would sometimes mess up the resolutions that were allowed. Also the compture and project both would refuse to boot which is awesome [you could have them, just not at boot time]. So this sucks. Any other ideas to get this to work? – Kurru Jun 20 '10 at 1:10

This will work without any signal problem if the wires are not extremely long. HDCP might not work when 2 screen are connected on a splitter.

Another problem is the resolution will be the same on both output and one screen might force is EDID. This can be a problem if the resolution of this monitor is lower than the other output because the higher resolution will be unavailable while the second monitor is connected.

share|improve this answer
up vote 1 down vote accepted

As I said above this created an EDID Clash and both projecter computer would refuse to boot with this connected.

Ended up getting an active DVI splitter, which while expensive, did the job perfectly

Got this:

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.