35" curved RPI3b+ retropie bad quality

supebillen

Asus vg35vq 35" curved monitor for vertical build.
Installed retropie image with emulation station quality looks bad do I need to change resolution?
Resolution of monitor are 3440x1440p 100hz how do I set the correct resolution so all picture fill the monitor. Have tried several images but they all look bad.
This my first experience with vertical image and monitor

mitu

You can change the resolution through config.txt parameters - see the Video Options parameters (hdmi_group/hdmi_mode).

The 3b+ may not support the - native - high resolution of the monitor so you may need to scale it down. To be honest, the monitor is a bit overkill for a Pi/playing old/retro games.

supebillen

@mitu said in 35" curved RPI3b+ retropie bad quality:

You can change the resolution through config.txt parameters - see the Video Options parameters (hdmi_group/hdmi_mode).

The 3b+ may not support the - native - high resolution of the monitor so you may need to scale it down. To be honest, the monitor is a bit overkill for a Pi/playing old/retro games.

@mitu thanks for answer.
I had this monitor anyway and was hooping to try it out before I build it ind an bartop. Only have an raspberry 3b+ on hand as the 4 is out of stock anywhere.
The monitor is 100hz but I know most games only runs 60fps.
Thanks for links to video options didn't know about the hdmi group mode options. I think this is what I am looking for but I am not able to finde correct hdmi_mode to use.
Can you help.
The asus monitor er in 3440x1440p 21:9 resolution. What do you think would be the best option?
Also the config.txt are modified on the SD card connected to the pc, right?
Or am I able to change the setting on the pi with USB keyboard connected to it?

mitu

@supebillen said in 35" curved RPI3b+ retropie bad quality:

The asus monitor er in 3440x1440p 21:9 resolution. What do you think would be the best option?

Depends on what video modes the monitor supports. Looking at the video modes in the docs, I don't see an out-of-the box mode with 21:9 aspect ration.
Try the settings from https://forums.raspberrypi.com/viewtopic.php?t=203100

Also the config.txt are modified on the SD card connected to the pc, right?

Yes, add the options at the end of the file.

supebillen

@mitu said in 35" curved RPI3b+ retropie bad quality:

@supebillen said in 35" curved RPI3b+ retropie bad quality:

The asus monitor er in 3440x1440p 21:9 resolution. What do you think would be the best option?

Depends on what video modes the monitor supports. Looking at the video modes in the docs, I don't see an out-of-the box mode with 21:9 aspect ration.
Try the settings from https://forums.raspberrypi.com/viewtopic.php?t=203100

Also the config.txt are modified on the SD card connected to the pc, right?

Yes, add the options at the end of the file.

OK,
Will try this when i come home to see if it boots up

display_rotate=2

disable_overscan=1
dtparam=audio=on
dtoverlay=disable-bt
dmi_cvt=3440 1440 50 7 0 0 1
max_framebuffer_width=3440
max_framebuffer_height=1440
framebuffer_width=3440
framebuffer_height=1440
hdmi_group=2
hdmi_mode=88
hdmi_aspect_21_9=7

#dtoverlay=vc4-fkms-v3d
max_framebuffers=2
gpu_mem=64
disable_splash=1