SNES monitor: input not supported

Mc78

Hi.
Got a little problem with playing snes roms.

Pi Model or other hardware: 3 b+
Power Supply used: A-dapt Model pwr 10009B 100/240V 50/60hz 5v 2.5a European, it came with the raspberry in the official case.
RetroPie Version Used: 4.4
Built From: SD Image on RetroPie website
VGA monitor using HDMI-vga switch
USB Devices connected: 1 lightstrip LED to light up marquee
Controller used: joystick + buttons (don't remember the brand but there's no problem with it)
Connected to Wifi (BE)

Config.txt msg:
https://1drv.ms/u/s!Avpe-NxF0f3LxnSoczEHKiZDxSEx
I don't know how to copy that config log to pastebin, so I thought a picture might do as well.
Link to my build: https://imgur.com/gallery/ZOfnPTh

So when I try to start up snes roms, I only get sound and the monitor states 'input not supported'whilst all other systems play fine.
When I hook up the Pi to the tv with only HDMI (no switch) snes also works fine.

When I boot up the system it also sometimes (like one out of 3 times) boots up in the wrong resolution, not stretched with bigger and blurry letters. When I turn it off and on again it Always boots up right. Maybe this problem is related to the snes problem?

I sometimes also get the yellow low voltage Arrow, but only when the Pi is getting real 'busy' with the extra kb scraping or dl themes or managing roms etc. Do the marquee led lights make a huge difference in this? I never had a malfunction cause of low voltage (I think) so I don't know if this is related but figured I just added it to this post.

I found someone posted a similar problem on the forum with NES games, but the way he solved it don't work for me. The arm_freq line already has a # etc, I posted a log earlier in this post.
i'm quite hesitant to mess around with it if i'm unsure what I'll do.

Anyone has any ideas how to solve this problem?

Thanks in advance :)

Mc78

Found the solution for the snes.
I thought i could not reach the quick setup menu when launching a rom cause the screen gave an error. Turned out i could if i pressed the button fast enough after launching the rom and changed the default resolution to 800x600 and it works!

Clyde

Thanks for sharing your solution.

Do you mean the Runcommand menu? If so, you can increase its timeout via RetroPie-Setup (and then Configuration / Tools -> runcommand) or via the runcommand configuration option in the RetroPie area of Emulation Station. See the link for further information.

Mc78

@clyde
Yes it was tje runcommand menu, thanks for the further info about it.

My retropie still sometimes boots up in the wrong resolution.
Anyone got any ideas what the cause of this problem might be?

Clyde

You can force a certain resolution in the /boot/config.txt. See Video issues in the docs.

If you need help with this, which resolution do you want to set?

Also, showing us your /boot/config.txt in a code block might help us helping you. See the Markdown reference how to make one.