DVI to HDMI stopped working at 1080p and other bizarre problems

[Vicaris]

A step by step of what happened to me.

My hardware -
HD 7750.
Main Monitor: LG E2260V
Secondary Monitor: 42LG50FD, it's a television.

Main monitor connected with an DVI to HDMI cable. DVI on the GPU, HDMI on the monitor.
Secondary Monitor connected with an HDMI cable.

The first problem:
Full screened Netflix on secondary monitor.
Turned off main monitor
When main monitor is turned on again, I get no image on it.
Fixed the problem by removing unplugging the HDMI end from main monitor and plugging it back.

This first problem didn't use to happen, it just started happening one day.

Second problem:
The first problem couldn't be fixed by unplugging the cable.

The only way to make any image appear on the DVI-to-HDMI cable was by setting the resolution to 720 or 1080i. This only works on the LG E2260V. On the television, nothing works.

If it is set to 1080i, the screen flickers.

At some point, 1080p actually worked, when I had the television set as main and the monitor set as secondary and connected to the DVI port using the DVI-to-HDMI cable. It worked only if the mouse arrow was the only thing on screen. The moment I dragged a window to the secondary screen, it stopped working.

I have tried: updating drivers on the monitors, updating the graphics card (which seems to be impossible to do on my own and in fact I don't even know if I have updated it or not), uninstalling drivers on the screens, uninstalling Microsoft Silverlight (it is the software used by Netflix to go fullscreen), unhooking every cable and changing them around in every possible way.

So, to sum up:

My GPU's DVI port will only display at 1280x720 or 1080i. It can work at 1080p but only if there's nothing on screen but the mouse arrow.


Things I know for sure are fine: the monitor and the television work fine, the HDMI cables. Not sure about the DVI to HDMI cable but I think it is fine too. It seems to be a software problem. I suspect that for some reason, Silverlight has told my graphics card that I cannot do 1080p with a DVI to HDMI cable and my GPU believed in the bastard.

 

[Ironsounds]

Hello... Sounds like a cable/sync problem... My TV/Computer Sync'd up best using the last HDMI port on the set. Go to your local Computer RE-cycling store for a another DVI cable $5... and try a DVI-I to HDMI adaptor $5 Ebay.

 

[Vicaris]

I'd gladly buy a new cable for that much and be sorted with it but in my country they cost way more, also weekend.

 

[Ironsounds]

Hello... my other question is " how far are you trying to send the signal to your TV ?" a long length requires a better quality/shielded cable.

 

[Vicaris]

TV monitor and PC are next to each other. I think both cables are less than 2m long.

 

[Vicaris]

I have detected another weird issue. The monitor doesn't support audio, yet, since this problem started, my e2260v monitor is listed as a playback device.

I think the problem's related to windows not realizing this isn't a HDMI cable, but an DVI-D to HDMI cable. I also think it has to do with some sort of refresh rate problem.

In fact I don't think changing the cable will fix it, this is a software problem.