Why does Windows think I have a 1440p display?

Thirith

I've now installed my HTPC and it's working okay, although there are still some niggling bugs. One of them is this: Windows seems to think that the display I've got is 1440p, when it's actually a regular Full HD TV. The computer is hooked up to a Sony receiver (STR-DH800) via HDMI, and that receiver is connected to the TV, again via HDMI.

Anyone know why Windows is confused as to the TV's resolution? And is there any way I can convince the system that, no, there's no point in upping the resolution?

P.S.: It actually seems to be more than just Windows; when the computer boots, the TV doesn't display all of the ASUS boot screen, as if the system thought the TV was bigger than it actually is.

Erlkönig

Thirith wrote: »

I've now installed my HTPC and it's working okay, although there are still some niggling bugs. One of them is this: Windows seems to think that the display I've got is 1440p, when it's actually a regular Full HD TV. The computer is hooked up to a Sony receiver (STR-DH800) via HDMI, and that receiver is connected to the TV, again via HDMI.

Anyone know why Windows is confused as to the TV's resolution? And is there any way I can convince the system that, no, there's no point in upping the resolution?

P.S.: It actually seems to be more than just Windows; when the computer boots, the TV doesn't display all of the ASUS boot screen, as if the system thought the TV was bigger than it actually is.

The bolded part happens with every single computer running Windows 8 or 10 that I have hooked up to a regular ol' 1080p TV. Surface Pro 2: image is extended off the screen; main desktop (with Win10 and GeForce 980): extended image; main laptop (Win10 and 980M): extended image. In all cases, the computer in question has been connected straight into the TV via HDMI (no intermediary receivers). So I would be very interested in seeing if anybody here knows off-hand what's going on.

Bendery It Like Beckham

The gpu relies on your tv to tell it what the resolution is. Your str-dh800 has automatic upscaling, as do most newer hd tvs. If I was to guess your tv is trying to upscale your 1080p signal from your pc. Try disabling that in your tv settings.

Synthesis

To be clear, OP, you're only using one monitor, right? A lot of Nvidia cards have a bad habit of deciding that, between an HDTV and a monitor, the HDTV must be where the BIOS is supposed to be sent, even if it's not the primary display (or it'll decide that the HDTV is the primary display, and you must be using it as such).

Thirith

Yup, just one monitor, a 1920x1080 TV. Since pretty much every signal that goes through the Sony receiver is 1080p but the HTPC is the only one where I get this issue, I'm a bit confused. Bendery, why/how would my TV try to upscale to a signal larger than 1080p if it cannot handle such a signal? I'll check if it's got such a function, though. (The AV components are ~5 years old, I'd estimate.)

Bendery It Like Beckham

I'm just taking a swing based on the information I have. But your tv isn't showing the screen at 1440p, your pc just thinks it is. Gpus aren't really designed with upscaling tvs in mind.

tsmvengy

My guess is your PC is confused because of whatever information it is getting from the receiver.

As to how to fix it, force 1080p either in the bios or in windows.

Thirith

Cool, will try that out. I didn't know there's anything in the BIOS on resolution, but then I've never had any problems with it previously.

tsmvengy

Also, what happens if your PC is just plugged straight into the TV?

Thirith

Haven't tried it yet, but I will. Anyway, it seems that Windows at least has stopped bothering me with notifications about how I could change to a higher resolution; perhaps it's got something to do with whether the receiver and TV are on before I switch on the HTPC or not.