Help my desire resolution (1920x1080 full screen) is stretched

[Lil T]

when I want to put 1920x1080 full screen for some reason its stretched, if i put same resolution but windowed its fine, same problem with 1600x900
other resolutions like 1280x720, 1360x768 and 1366x768 full screen work fine
(on windowed everything is fine and works normally)
https://ibb.co/Pc9MwK0 (here is the pic how it looks 1920x1080 full screen)
so i tried:
-Open Steam and then your library
-Here, right-click on Song of Nunu
-Click Manage
-Then select Browse local files
-Right-click on the executable and select Properties
-Click the Compatibility tab
-Select Change high DPI Settings
-Here, check Override High DPI scaling behavior, and make sure the Application is selected in the dropdown
-Press OK

Still nothing, then i tried:
-Right-click on your desktop and select Display settings
-Under Scale and Layout, set the value to 100% (Recommended)
and still nothing,

My brother and friend downloaded the game and its fine for them idk whats the problem for me, my friend also tried other things and he couldn't find the problem, plz someone help :')

I tried to get in touch with riot and I'm waiting for their response, if they give me a solution and it works I will post it

[Dante]

"my resolution is not working" is not the right description of the problem. Explain what problem exactly are you getting. Are you not able to select your desired resolution in graphics settings? Also kindly explain which display you are using and at what resolution.

[Lil T]

oh, well I did write what was the problem or mby it was inside my head xD
either way, so when I want to put 1920x1080 for some reason its stretched when its full screen, if i put same resolution but windowed its fine, same problem with 1600x900
other resolutions like 1280x720, 1360x768 and 1366x768 works fine (full screen) (on windowed everything is fine and works normally)
also if i try 1920x1080 and 1600x900 on fullscrene it doesnt change anything it stays the same, but on windowed it changes

[Lil T]

https://ibb.co/Pc9MwK0
this is how it looks when its 1920x1080 full screen, also 1600x900 full screen looks the same as 1920x1080

[Dante]

This does not look like a 16:9 aspect ratio display at all. I saved the image you shared and it was 1440 x 1080. It is not a stretched image. You are just getting black borders at top and bottom because of the weird aspect ratio of your monitor which is normal.

[Lil T]

yeah I get that but idk how to fix it, i went to nvidia and tried to put it on full screen and someother things
https://ibb.co/p0mVk8v

[GiN^^]

ENG: You probably have more than one screen connected, and they are in different resolutions. Perhaps the screens are in cloning mode. I had the same problem, and I solved it by putting the screens in the "Expand" mode.

RU: Вероятно у тебя подключено больше одного экрана, и они в разном разрешении. Возможно экраны стоят в режиме клонирования. У меня была такая же проблема, и я её решил поставив экраны в режим "Расширить".