Catalyst 9.1 HDMI problem

[biscuitboy]

Hi Guys,

I have a 4890 with the latest Catalyst drivers and am having trouble with the HDMI out on the card.

When I first plugged in my 42" 1080P TV to my Card via HDMI it showed in the catalyst drivers and extended my desktop across to it brilliantly...

(My main PC monitor is connected via DV-I)

But I was fiddling with the resolution settings to try to get it to display 1080p properly. (Text was blurry @ 1080p, but fine at 1280X1024 and games and videos were fine at 1080p)... I set to display the HDMI Only so it would not stress the graphics card while gaming and then accidentally set the resolution to one not displayable by the TV as I struggled to read the text.

Now, whenever I plug the HDMI in it automatically switches to the TV as primary display, powers off my monitor and outputs the unsupported resolution... So I get no picture.

I cannot access the settings for the TV in the catalyst drivers when it is unplugged and cannot see a picture when it is plugged in.

I also have tried reinstalling the catalyst drivers and run driversweeper on the ATI drivers but it still maintains these settings somewhere, also, restore to factory defaults in the driver doesnt seem to do anything...

Please help guys! :banghead:

Regards

Biscuitboy

 

[biscuitboy]

Okay,

after much fiddling around in the ccc I found a resolution, I had to enable the hotkey manager and set hotkeys to switch display, I had tried this via profiles manager, but must be done in hotkeys...

My main issue now is the display in 1080p, ie the blurry text.

It seems fine in Games and 1080p displays brilliantly, however windows text is poor.

Does display well in 1280X1024 however on a big 42" tv it doesnt look the best,

any help would be appreciated!

 

[Rastalovich]

Off the top of my head, I would say that ur 1080 display for text on the 42" is "just the way it is".

Text on TV is awful for interlaced and progressive screens.

As u've noticed, games, films, probably look fairly good. Text in them can look bad also.

Interlacing and progressive screens are a really old technology that tvs have adopted to make themselves look as good as they can whilst using the resolutions intended for computer monitors. Thank your lucky stars they don't use any hold-and-modify modes.

Interlace screens for commodore 64s never looked good on even an rgb monitor, but pics and genlock stuff u could get away with.

Thing u could possibly do is try changing text colors, shadowing or even highlighting. Contrasting colors are the ones that look the worst. That or settle for a native resolution without p or i. Still won't look like a monitor, but the irritating bit should be gone.

 

[biscuitboy]

After quite a bit of playing and tweaking, it seemed it was to do with the refresh rates...

At 1080i on the Philips TV the text was Spot on, however 1080p was blury..

I think it has to do with the Pixel mapping....

I switched to an LG TV and now 1080p is spot on, I assume due to its 1:1 pixel mapping at 1080p..

So i guess that means, even if a TV says it is 1080p, make sure it has 1:1 pixel mapping if you want to use as a monitor...... Otherwise you will have to run at 720p or 1080i...



Might help someone else out somewhere down the line..

 

[zak4994]

That did answer some questions for me.

 

[Rastalovich]

Key thing to take note of here is "native resolution".

Pretty much all HDTVs will list it in their specs.