Will using DVI to HDMI fix my EDID\handshake issue

6 posts / 0 new
Last post
Offline
Joined: 3 Oct 2006
Will using DVI to HDMI fix my EDID\handshake issue

I have an ongoing problem with my TV losing the signal from my HTPC. It is currently connected via HDMI. I am wondering if I go to a DVI to HDMI cable and separate audio cables if that will fix my problem. Does the DVI - HDMI carry 1080P without the need for any handshaking?

Offline
Joined: 29 Nov 2006

Does it lose sync while you're watching it or only when you do something like switch TV inputs or reboot the HTPC?  If the former, I don't think going DVI to HDMI will help.  What makes you say this is an EDID issue?  HDMI and DVI are identical with respect to EDID, if that's the issue you may need a DVI Doctor from Monoprice.  I have one and it works great!

ET

Offline
Joined: 3 Oct 2006

It looks like it is an EDID issue whether I go with DVI or HDMI. It loses synch after the TV is on a different input for a while. And it is beginning to look like I'll have to go with the DVI doctor. To bad they don't make a HDMI doctor.

So with the DVI doctor I guess I'll have to track down a DVI cable and then use my DVI to HDMI cable and an additional cable for audio. IS that correct.

The sad thing is that these problems are across the board. Sometimes it is the TV, or the video card or a driver. One fix for one guy rarely seems to help the next.

I've seen some people even fix their issue with a different brand of cable.

I just learned that handshake only refers to HDCP content if I understand that correctly. And that the DVI doctor does not pass HDCP. No biggee I think anydvd fixes that.

I got one more fix to try before I go dump another 60 bucks on something that should not be required. Somewhere I saw a link to some program that does what the DVI DR does and that is it reads the EDID from the TV and then you add it to the display driver file. If I find the link I'll post it.

And where the heck is the 9.1 driver from ATI. They'll probably fix this issue the day after I get it fixed.

Offline
Joined: 29 Nov 2006

The DVI Doctor magically(!) works as an HDMI doctor, but you'll need two HDMI to DVI cables.  I go HDMI out of my HTPC, DVI into the DVI Doctor and HDMI into my receiver.  No issues with the TV switching inputs (or even being on), and the audio is still passed through (including hi-def audio formats).  This surprised me as I assumed the audio would be lost when converting to DVI, but it isn't.

ET

Offline
Joined: 3 Oct 2006

So sound goes thru. After seeing the price I was begiing to wonder if I shouldn't spend a little more for a HDMI matrix setup. If one of those fixes the EDID problem and also lets me send my HTPC to multiple TV that might be a nice feature for a few dollars more.

Here is the link discussing that software that pull the EDID
http://www.laptopvideo2go.com/forum

I am pretty sure the link I found yesterday discussed using an ATI card.

Offline
Joined: 29 Nov 2006

Is your problem that you have to re-set your HTPC's resolution whenever you switch your TVs input away the back to your HTPC?  I found both the Nvidia and Intel drivers detect this has occurred, and switches to a "safe mode" resolution (or back to single-display mode if you're running dual/clone as I am).  It's not a loss of handshaking per se, it's a "feature" of the drivers.  DVI Doctor will definitely fix this for you.

By an HDMI matrix setup, do you mean a powered HDMI splitter?  If so, that won't help, unless the one you get has some sort of built-in EDID-saver.

I'm curious if the hack you linked to will work, though I use Intel graphics so it's no good for me.  My guess is no, they're overriding the EDID but your situation is that there is no EDID.  Worth a shot though if you can find an ATI equivalent.

ET

Login or register to post comments
Website design by Yammm Software
Powered by Drupal