Problem with Amiga on CRT. No display at all !

ZFEbHVUE

Hello All,

I put recently the Batocera 5.25 on a PC (64bits) in my arcade station with 15KHz CRT screen. I modified the .xinitrc.
I tried some modelines in Pal (50Hz/15KHz/interlace) and it's work for almost the systems emulations but no for Amiga where i get every times a black screen (must shutdown all the system). I have two CRT TV with 50Hz (but not support 60Hz). I try different modes in 50Hz but there didn't work on Amiga. I don't how is launched the emulators (more importantly Amiga).

I'd be very grateful if anyone had an idea, a solution or a path to explore.

take of yourself,

Stéphane.

Ps : For information No modes work on EmulationStation with 60Hz (interlace or not) because my CRT TV is in 50Hz even on the original 1084 (50Hz) CRT screen of the Amiga.

ZFEbHVUE

Hi,

I tried LIBRETRO-PUAE and it works under on my CRT monitor but the screen isn't big enough and it's the same under my LCD monitor.

FS-UAE doesn't work at all with my CRT monitor but the display is quite perfect under my LCD.

Are there people who know how FS-UAE is launched and where its init files are located?
(same for LIBRETRO-PUAE for the image resolution )

Best regards

Stéphane.

ZFEbHVUE

Hello all,

nadenislamarre;

Do you have an idea about changing Batocera's native resolution to run on a 15KHz/50Hz CRT monitor, the FS-UAE emulator launches with a black screen and nothing else (forced to reboot)?

(LIBRETRO-PUAE works on CRT with not a good screen dimension but same with LCD monitor).

The other emulators work very well except the one from apple2 (not working at all) and some problems with C64.

Thank you.

Take care of yourself and your loved ones :-)

Best regards.

Stéphane.

BZZ

ZFEbHVUE So first of all I found this topic that might put you in the right direction: https://forum.batocera.org/d/79-15khz-for-tv-monitor/14
Did you check your Xorg.0.log for what might cause your black screen? And xrandr.txt for available settings?

The problem I encountered with Xrandr is that it often disconnects the screen if the screen is old. This is apparently due to the fact that it detects the screen as turned off hence why it goes to 'black'. At least it did in my case. Take a look: https://wiki.archlinux.org/index.php/Display_Power_Management_Signaling.

The other side of the coin is the resolution. Did you try this wiki: https://wiki.batocera.org/doku.php?id=display_issues ?
Try setting it to something low in Batocera terminal like:
cp /etc/X11/xinit/xinitrc ~/.xinitrc
export DISPLAY=:0.0
xrandr
xrandr -s 640x480

Also when the screen goes black did you try swaping to terminal to see if the screen refreshes? If it does you can always do 'startx' to see if it goes back to Batocera interface.

What is your CPU/GPU/RAM? and/or pc/laptop model? Are you on 5.25 or 5.25legacy? Did you turn on Nvidia driver (if applicable) ?: )

Have you tried setting your global.videooutput to VGA in /userdata/system/batocera.conf? I.E global.videooutput="VGA1" ?

ZFEbHVUE

BZZ

First of all, my batocera 5.25 works under a CRT 15KHz (50Hz (pal) not 60Hz).

And I know these two posts
https://forum.batocera.org/d/79-15khz-for-tv-monitor/14
https://wiki.batocera.org/doku.php?id=display_issues ?

it was my post 1 month ago … I gave all my system ans i explain the way to work
https://forum.batocera.org/d/3489-batocera-on-crt

(PCx64bits)
ATI Radeon X600 256MB.
intel® Core™2 duo cpu E4700 @2.6GHz
Memory 4GB.

xrandr -s 640×480 doesn’t work for CRT 15KHz for sure …. this is for 60Hz vga

The command in .xinitrc who work for most emulators under batocera is :

In .xinitrc, you must put

xrandr –newmode “648×480_15KHz_50Hz” 12.625000 648 672 736 808 480 534 539 625 -HSync -VSync interlace
xrandr –addmode DVI-0 “648×480_15KHz_50Hz”
xrandr –output DVI-0 –mode “648×480_15KHz_50Hz”

Here is a example of pal modeline 50Hz 15KHz. it can be changed by other modeline

I wrote two codes for that. One for verify an modeline and another one for calculated a modeline with the resolution, the V H blanking (front and back porch), the pixel clock, the V H sync, the framerate (interlac or not) and the parameters for moving picture.

The only question is why batocera works for lots of systems but not for FS-UAE amiga and why it’s work Libretro PUAE.

Stéphane.

BZZ

ZFEbHVUE ok. You seem to be versed and researched in topic already ;-) Did you check your Xorg log ?