Enable 2048x1080 resolution

[Oliviervgirard]

Hi!

1st here's the system:

Windows 10 x64

AMD A8-6500 APU with HD 8670D graphics

LG 31MU97 4096x2160 display

Connected with HDMI

So, since the LG monitor is a bit wider than standard 4k, I need to use a 2048x1080 resolution to have a 1:1 1080p pixel match (avoid the black bars on each side)

Windows only offer a max of 1080p (my hardware is probably too old), I cannot use a custom resolution in the AMD driver that go larger than 1920 and the popular free custom resolution utility (CRU) don't allow me to enter those values (number become red). Maybe I'm not using it the right way....

Anyone can give me a hint?

Thanks!

 

[offroadguy56]

I already typed info about the HD8670 below which is the desktop version. I did more research into the HD8670D which is the IGPU variant and all I could turn up is that the max digital resolution is 2560 x 1600 and max VGA resolution is 2048 x 1536. Your resolution fits within the maximum but I can't see why you can't enable it. Have you tried updating your Catalyst drivers? I think AMD has now moved to Crimson as it's new driver/software platform. You can try changing HDMI cables or trying a different a different video standard like DP or DVI. I'm leaving the info in below as it might be useful to someone out there.




According to AMD the max resolution for the HD8670 is 4096x2160 @ 60 Hz per display on Display Port 1.2, 4096x2160 @ 30 Hz on HDMI, 2560x1600 on Dual-link DVI, and 2048x1536 on VGA.

Since you're using HDMI I believe you need an HDMI 1.4 compliant cable. If you're monitor has Display Port you should try that as you would be able to push a higher refresh rate.

 

[Oliviervgirard]

First thanks for your time!

I found the solution, I had to download the beta Crimson drivers for my older iGpu and there I had access to custom resolutions in the "More Radeon Settings"

I clicked "New" and changed the resolution in the "Base Mode" section as well as in the "Synchronisation Details" sections. Clicked "Test" and it worked!

AMD support was impressively useless... but well, it works now!