lr-pcsx-rearmed unable to find suitable video mode

Nevohteeb

Hello everyone,

I am trying to setup lr-pcsx-rearmed on my RPI4, which is installed in my arcade cabinet.
The video is provided to the cabinet by GPIO using a homemade VGA 666 to JAMMA adapter.
That works for about a year now and I usually use it for MAME, NES, Master System, SNES and MegaDrive games.

Due to the RPI4 video mode switch limitations (unable to switch resolution on the fly) I usually set the proper resolution in the /boot/config.txt file and reboot the RPI4 whenever I wanna change the system I want to play.

Now, it seems I can not do that using lr-pcsx-rearmed.
As an example, I tried to launch Rayman (USA) and got a segmentation fault. (verbose log above).

The problem is the following : Rayman is a 320x239 (not 240) game, so I set the RPI4 in 320x240 mode, but the emulator is looking for a 256x240 mode at start, does not find it and crashes.
If I set the RPI4 in 256x240 mode, the game launches normally but in game one can easily see that it is not the proper resolution. I can set 320x239 setting x-width and y-width in reatroach, but of course the screen is cropped.

When does concern me is that it only happens with lr-pcsx-rearmed. I can launch any other emulator in any resolution and it works.

Is there a specific option to set in the retroarch-core-options file or something ?

INFO] [Video]: Video @ 256x240
[INFO] [Video]: Starting threaded video driver ...
[INFO] [DRM]: Found 1 connectors.
[INFO] [DRM]: Connector 0 connected: yes
[INFO] [DRM]: Connector 0 has 1 modes.
[INFO] [DRM]: Connector 0 assigned to monitor index: #1.
[INFO] [DRM]: Mode 0: (FIXED_MODE) 320 x 240, 60 Hz
[INFO] [GL]: Found GL context: kms
[INFO] [GL]: Detecting screen resolution 320x240.
[ERROR] [KMS/EGL]: Did not find suitable video mode for 256 x 240.
/opt/retropie/supplementary/runcommand/runcommand.sh : ligne 1285 :  1867 Erreur de segmentation  /opt/retropie/emulators/retroarch/bin/retroarch -L /opt/retropie/libretrocores/lr-pcsx-rearmed/pcsx_rearmed_libretro.so --config /opt/retrop\
ie/configs/psx/retroarch.cfg "/home/pi/RetroPie/roms/psx/Rayman (USA).cue" --verbose --appendconfig /dev/shm/retroarch.cfg

mitu

Looks like the 256x240 resolution might have been saved to the configuration file.
Please add more info about your setup, as detailed in https://retropie.org.uk/forum/topic/3/read-this-first. Post the /opt/retropie/configs/psx/retroarch.cfg file on pastebin.com and provide the link.

Nevohteeb

@mitu said in lr-pcsx-rearmed unable to find suitable video mode:

https://retropie.org.uk/forum/topic/3/read-this-first

You're right, I am so sorry I did not provide enough informations.
Here they are.

Pi Model or other hardware: RPI 4
Power Supply used: official one
RetroPie Version Used (eg 3.6, 3.8.1, 4.1 - do not write latest): Linux retropie 5.10.17-v7l+ #1403 SMP Mon Feb 22 11:33:35 GMT 2021 armv7l GNU/Linux
Built From: (Pre made SD Image on RetroPie website, updated via the retropie-setup script.
USB Devices connected:
Controller used: arcade cabinet (virtual keyboard) and Retro-bit SEGA MegaDrive 6 buttons pad
Error messages received: [KMS/EGL]: Did not find suitable video mode for 256 x 240.
Emulator: the emulator which is in concern is lr-pcsx-rearmed
Attachment of config files:

/opt/retropie/configs/psx/retroarch.cfg
/opt/retropie/configs/all/retroarch.cfg
/opt/retropie/configs/all/retroarch-core-options.cfg

How to replicate the problem: juste by setting the resolution of RPI4 by any other than 256x240 one in the /bootconfig.txt file.

mitu

Looking at the configuration files, I see that the video resolution is not set there, so that's ok. Do you have a per-game configuration or override that sets the video resolution to 256x240 for this game ?
The system has only 1 resolution available (the one you've set via /boot/config.txt), but for some reason RetroArch tries to switch to 256 x 240.

Btw, the lines about multitap added in /opt/retropie/configs/psx/retroarch.cfg have no effect, since they're actually core options - same options are already set in the core options file.

Nevohteeb

@mitu said in lr-pcsx-rearmed unable to find suitable video mode:

Looking at the configuration files, I see that the video resolution is not set there, so that's ok. Do you have a per-game configuration or override that sets the video resolution to 256x240 for this game ?

I indeed checked that and did not found any resolution setting for the emulator anywhere.
I do not have any per--game configuration file for this emulator. I tried with 3 different games and I always experience the same issue. Is there any chance the resolution is set in another file ?

@mitu said in lr-pcsx-rearmed unable to find suitable video mode:

The system has only 1 resolution available (the one you've set via /boot/config.txt), but for some reason RetroArch tries to switch to 256 x 240.

RetroArch does that only with lr-pcsx-rearmed. All the other emulators automatically use the native (the one set in /boot/config.txt) resolution.

It worth mentioning that I found that bug reported in some other threads (in 2016) and the solution was to reinstall the emulator from source. So I reinstalled the emulator twice, once from pre-compiled binary, once from sources, and the bug still remains.

@mitu said in lr-pcsx-rearmed unable to find suitable video mode:

Btw, the lines about multitap added in /opt/retropie/configs/psx/retroarch.cfg have no effect, since they're actually core options - same options are already set in the core options file.

Yeah I saw that. I set that earlier to fix the "no controller recognized" bug. I'll delete those lines in the core file.

mitu

@nevohteeb said in lr-pcsx-rearmed unable to find suitable video mode:

It worth mentioning that I found that bug reported in some other threads (in 2016) and the solution was to reinstall the emulator from source. So I reinstalled the emulator twice, once from pre-compiled binary, once from sources, and the bug still remains.

I don't know if it's not the same thing - the video backend for the Pi4 (DRM/KMS) is quite diffferent from the one available in earlier models.

Can you upload a verbose log from the emulator to pastebin.com and post the link ?

Nevohteeb

@mitu

Sure, here are the 3 files that re generated in the/dev/shm/directory :

Thx a lot for the time you spend to help me.

mitu

@nevohteeb said in lr-pcsx-rearmed unable to find suitable video mode:

runcommand.log

You have a core override for lr-pcsx-rearmed:

[INFO] [Overrides] core-specific overrides found at /home/pi/.config/retroarch/config/PCSX-ReARMed/PCSX-ReARMed.cfg.

Delete the file and see if the games will start.

Nevohteeb

@mitu
Damn, you're right. I have no idea why this file existed.
Game started as soon as I deleted it. Thx a lot !

Nevohteeb

I still have a question tho : according to the RetroPie doc page :

global configuration is set in /opt/retropie/configs/all/retroarch.cfg
system specific configuration is set in /opt/retropie/configs/psx/retroarch.cfg
rom specific configuration is set in /home/pi/RetroPie/roms/psx/Rayman.cfg

Attempting to set a specific resolution for Rayman, I figured out that the file /home/pi/RetroPie/roms/psx/Rayman.cfg is absolutely not read at game start whereas /opt/retropie/configs/psx/retroarch.cfg is.

Moreovoer, investigating the runcommand.log file I read that :

[INFO] [Overrides] no core-specific overrides found at /home/pi/.config/retroarch/config/PCSX-ReARMed/PCSX-ReARMed.cfg.
[INFO] [Overrides] no content-dir-specific overrides found at /home/pi/.config/retroarch/config/PCSX-ReARMed/psx.cfg.
[INFO] [Overrides] no game-specific overrides found at /home/pi/.config/retroarch/config/PCSX-ReARMed/Rayman.cfg.

Then I moved the /home/pi/RetroPie/roms/psx/Rayman.cfg file to the/ome/pi/.config/retroarch/config/PCSX-ReARMed/ and figured out that in this case, modifications are taken into account...

So, is the doc page obsolete or is there something I missed ?

mitu

@nevohteeb said in lr-pcsx-rearmed unable to find suitable video mode:

So, is the doc page obsolete or is there something I missed ?

The .cfg must contain the full file name, including the extension. So it's Rayman.cue.cfg, not just Rayman.cfg.

Nevohteeb

@mitu said in lr-pcsx-rearmed unable to find suitable video mode:

@nevohteeb said in lr-pcsx-rearmed unable to find suitable video mode:

So, is the doc page obsolete or is there something I missed ?

The .cfg must contain the full file name, including the extension. So it's Rayman.cue.cfg, not just Rayman.cfg.

You' re right. Thanks a lot.