@henk Seeing as you CRT has Scart inputs it would be a downgrade to pair it with a Composite cable when the CRT has support for RGB. Look into PI2SCART or Recalbox RGB Dual instead and save yourself the hassle and trouble.

@mitu Yep it was that. Bought an official cable and it works. Now I just need to work out how to get emulationstation and the console to be the same scale

@barbudreadmon will try reading it, but thing is i don't have any problem untill i run something outside of emulationstation...
when system boots (and boot use config.ini settings) all is as it should be.

EDIT: i didn't find anything useful in that link :/

@Mrakobijes said in trying to use KMS driver yields no composite video output (Raspberry Pi 4):

dtoverlay-vc4-kms-v3d-pi4,composite=1

This looks like a mis-spelling, it should be just:

dtoverlay=vc4-kms-v3d,composite=1

and you should start with stock config.txt, instead of the one you're using, which has too many overclocking options which may conflict.

Note that this configuration is not fully supported by RetroPie yet and for the KMS driver is recommended to use an up-to-date Linux kernel/firmware.

You

@dankcushions said in N64 games "shakes" on CRT (composite connection):

it sounds like you might have a tearing issue?

It's looks like wrong\incorrect vsync

@dankcushions said in N64 games "shakes" on CRT (composite connection):

have you tried pure kms mode?

Not sure understood how activate it - just wrote

dtoverlay= vc4-kms-v3d

in config.txt at all or what else?

@beldar I think it's something where the cable probably shouldn't be working, but does.

I mentioned here I was using an Argon One V2 case, that case didn't work with the same cable.

However I just purchased an official cable, and it works fine.

False positives everywhere

@busywait Thanks for that, I added "composite=1" to the "dtoverlay" line in config.txt, and it has had some change, but the screen is still blank.

Now when I run modetest, the connector "composite-1" shows up, but its status is "unknown", and it has no associated encoder id.

The list of encoders has also changed to include TVDAC, but it has a crtc of 0.

TBH I'm not sure how connector, encoder, and crtc interrelate, and/or whether it's possible to fix the relations (assuming that's all the problem is).

@buzz I've tried this before, but I've tried again just now, to make sure.

overscan_top=40 overscan_bottom=40 overscan_left=40 overscan_right=40 overscan_scale=0

While this does add the overscan on the console, it also adds it to EmulationStation and RetroArch while emulating.

@brentriddell to apply it first put the file tweakvec.py into directory home/pi/tweakvec/ on your sd card ( or other storage whre retopie is installed if that).
Then you can enter in terminal window on your PC or in retropie console next:

sudo python3 /home/pi/tweakvec/tweakvec.py --preset PAL60 you get true colors and pal 60 mode (must be sdtv mode = 1 in config.txt to get 60 Hz in all emulators)

But after next reboot you got standard ntsc mode ( with wrong colores), so if you want tweakwec fix always turned on you need write this command in file /opt/retropie/configs/all/autostart.sh It will be run tweakwec automatilly at every retropie start.

But in the end i've get right colors but also get "flickering" in some games. So to get flickering off i've used progressive mode ( write sdtv mode = 16 in config.txt)

Maybe it was helpfully too ( find my messages in the bottom of thread) https://github.com/raspberrypi/firmware/issues/811

I have the same problem, I can solve it changing sdtv_mode=1 for use NTSC system instead mode=2 for PAL.
I prefer PAL colours but the flickers are awful!

@mitu thank you Mitu!!! 👍😎

The BIOS Files are in the rom folder of "AdvanceMame".
It were about 40, which i renamed to (i.e.) "ZZZ BIOS - CPS1" to get them all together on the bottom of the gamelist and hide them.
As mentioned the only two ones that are still visible since a couple of weeks in full mode are Akklaim PSX and Naomi.
It does not really disturb me!!!, but i will Post the filenames as soon as i am back on my Pi 😉

The jagity edge is on any straight line. Thanks so much for the link. I have been trying all sorts of things to get this to look good. Thanks so much. The lines show on front end or in game.

@240pnoob said in 240p Over Composite to CRT Problems:

any easy guides on how to do this? Keep in mind I have only had a raspi for about 24 hours, with 20 of them being me fighting it.

You really should read on about the Raspberry Pi and RetroPie in general before trying to customize your installation. Themes can be installed from the RetroPie setup script - https://retropie.org.uk/docs/Themes/.

Thanks Mitu!!

It seems that adding/enabling these lines in the config.txt fixes the problem

sdtv_mode=2 #My tv is PAL
sdtv_aspect=1 #4:3
audio_pwm_mode=0
dtparam=audio=on (this one is enabled by default)