pc > hdtv 1920x1080 ok until power off, then wrong resolution

[dianedebuda]

Guessing EDID is bad; how to overcome?

Setup: PC > Ckitze 550 (1-4 hdmi splitter) > HannsG 24" monitor & Insignia 65" hdtv. All is fine at pc boot. When hdtv powered off/on, all windows are resized. Google results indicate others have had EDID problems with Insignia, but don't see usage with pc. I tried a Ckitze BG-555 (4x2 hdmi matrix), but couldn't get any signals through, so returned it. Resize happens w/o splitter too.

I would actually like a 4x2 matrix and have some override to force 1920x1080 to the hdtv. At minimum, I'd at least like to force 1920x1080 with the current splitter.

Ideas?

[Krispy Kritter]

If the issue is only occurring when the Insignia TV is used, you are likely out of luck. Not much you can do with a TV. There may or may not be a firmware update, and it may or may not resolve HDMI EDID issues.

Splitters can also be a problem. They don't all treat EDID information the same. But as you tested without the splitter, it obviously doesn't matter in this case and it's the TV.

[gastrof]

Guessing EDID is bad; how to overcome?

Setup: PC > Ckitze 550 (1-4 hdmi splitter) > HannsG 24" monitor & Insignia 65" hdtv. All is fine at pc boot. When hdtv powered off/on, all windows are resized. Google results indicate others have had EDID problems with Insignia, but don't see usage with pc. I tried a Ckitze BG-555 (4x2 hdmi matrix), but couldn't get any signals through, so returned it. Resize happens w/o splitter too.

I would actually like a 4x2 matrix and have some override to force 1920x1080 to the hdtv. At minimum, I'd at least like to force 1920x1080 with the current splitter.

Ideas?

Handshake problem due to the TV being turned off?

What happens when you turn the TV back on, see the wrong aspect ratio, and UNPLUG THE HDMI CABLE (either end), then plug it back in?

[Cornucopia]

One of the primary rules of troubleshooting is to test each component link in the chain - in isolation. You haven't fully done that yet: try a different tv.
Another similar rule is to minimize extraneous/complicating variables (hopefully remove altogether). You haven't fully done that yet, either.
It may well be that you want what you can't have with the current equipment, if at all.

Scott

[dianedebuda]

What happens when you turn the TV back on, see the wrong aspect ratio, and UNPLUG THE HDMI CABLE (either end), then plug it back in?

Once Windows has resized the windows to a smaller size, plugging/unplugging hdmi won't have any effect. That is, the resized windows won't magically return to their former sizes.

One of the primary rules of troubleshooting is to test each component link in the chain - in isolation. You haven't fully done that yet: try a different tv.

I didn't have this problem using the same computer with a 42" Vizio that I was using before acquiring the 65" Insignia. Now have same problem with both Win7 & Win8 when using the Insignia. So I'm figuring a muddle between the Insignia & the AMD video driver.

I have mucked a bit with a couple of registry entries (http://answers.microsoft.com/en-us/windows/forum/windows_7-hardware/windows-7-movesres...9-1a68fbd106aa), but not quite "there yet". Wish I knew more about the Simulated Video stuff 'cause I'm thinking the software solution may be "there" (unless AMD refines the catalyst, of course).

Cornicopia, your comment made me think about my "old" setup. I used the Vizio for "computer" work and for playing movies. The HDMI was terrible for text, so I used VGA for spreadsheets, programming, etc; used HDMI for movie playback. So had both cables plugged to the same Vizio and "duplicated" the displays. On the Insignia, the VGA is horrible for text, so I only use HDMI. As a lark, tried the same VGA+HDMI setup with the Insignia - and my resize problem goes away. Who'da thunk?

edit: Any way to add "solved" to thread title?

[Cornucopia]

It sounds like a combination of the "duplicated" display constraint and the VGA constraint. Both VGA and HDMI negotiate between source (video card) and sink (display) about which resolutions are common to both source and sink. It's very likely that HDMI has a list of available resolutions, but for whatever reason the 1920x1080 one is not its primary/preferred. Add to that mix the list that VGA has, which is likely a smaller subset. Maybe in that list 1920x1080 is higher up on the list, and that it becomes the "preferred" when the added constraint of a "duplicate" screen size exists on both.

I did not get a clear indication from your original post that you were using spanned/dual/duplicate monitors from a single video card, rather it seemed you were relying on the HDMI splitter to do that work. Hence the confusion.

Scott

[dianedebuda]

The original problem was with a single monitor using only hdmi to a single video card, so your initial view was correct. It was your comment that prompted me to think about an earlier configuration that worked. For a while, it seemed that the splitter was masking some of the resizing effects. I'd kind of remembered posts mentioning devices that spoofed EDID, so that was an area I thought a software/registry mod or piece of hardware might resolve the headache.

I'm glad to have been lucky here & stumbled on an "odd" solution.

[dianedebuda]

For future searches...

I found a better solution today in an old post http://www.tomshardware.com/forum/327519-33-resolution-auto-switching. In short, went to AMD Catalyst Control Center, My Digital Flat-Panels, HDTV Support and selected "Add 1080p60 format to the Display Manager (NTSC)". That fixed it and I don't have to duplicate the display to VGA and HDMI.