Dosbox on pi 4, game window is fullscreen but not centered on screen

quicksilver

@Simrose does your TV remote have a button labeled "display" or something similar? My Vizio TV has this, and when pressed it shows the current input selected and the current resolution. Then you can launch a dos game and check to see what resolution it's running in.

A few other things to check. Can you launch a dos game then exit the game. Then go to /dev/shm/runcommand.log and post the contents of that file here?

Also you might try looking up your exact Samsung TV model and see if you can get a list of supported resolutions. Perhaps we are requesting a resolution that your TV doesn't support.

Crush

Great thread, this answers pretty much all the questions i had on this subject really.
But is this an issue that is being worked on to resolve or is it just incompatible with the PI4 drivers and that's the end of story?

quicksilver

@Crush said in Dosbox on pi 4, game window is fullscreen but not centered on screen:

But is this an issue that is being worked on to resolve or is it just incompatible with the PI4 drivers and that's the end of story?

Not much can be done I'm afraid. It doesn't sound like much development is happening on the fkms drivers. But it's possible this isn't an issue on the full kms drivers. Kms seems to be what the rpi devs are focused on right now.

Glaglachel

@quicksilver Very nice workaround, it takes just some time for my projector to adapt the display resolution but as it is automatic, fine for me :-) Thanks !

I even had to slow some games... :-D

Simrose

@quicksilver
The resoltion on tv info says 1920x1080p
so that must be the issue that its not switching and the scripts not activated.
i have them in correct location, do i need to do anything with them before running games.
Sorry took along time to respond
Thanks
Sim

quicksilver

@Simrose try this: drop to the command line (press f4 if youre in emulation station) and type

tvservice -m DMT

Post the output here.

Also do

tvservice -m CEA

And post the output here

Simrose

@quicksilver !
screenshot

quicksilver

@Simrose Ok, so now we know that your TV should support DMT mode 4. Can you verify that your runcommand-onend.sh and runcommand-onstart.sh are named correctly? Can you verify that they are located at /opt/retropie/configs/all/? Can you post the content of each file?

Simrose

@quicksilver

location
runcommand-onend.sh contains
#! /usr/bin/env bash
echo "Hello logfile - runcommand-onend checking in here" >&2
#START DOSBOX SECTION - SNIP HERE IF PASTING INTO EXISITNG SCRIPT
if [ $2 = "dosbox" ]
then
echo "Reverting display back to preferred mode" >&2
tvservice -p
fi
#END DOSBOX SECTION
runcommand-onstart.sh file contanins
#! /usr/bin/env bash
echo "Hello logfile - runcommand-onstart checking in here" >&2
#START DOSBOX SECTION - SNIP CONTENTS IF PASTING INTO EXISTING SCRIPT
if [ $2 = "dosbox" ]
then
echo "dosbox detected - changing video mode to 640x480@60hz" >&2
tvservice -e "DMT 4"
fi
#END DOSBOX SECTION

quicksilver

@Simrose in the start script try changing

tvservice -e "DMT 4"

to

tvservice -e "CEA 1"

also, can you run a dosbox game, quit the game. Then post the contents of
/dev/shm/runcommand.log?

Simrose

@quicksilver said in Dosbox on pi 4, game window is fullscreen but not centered on screen:

CEA 1

/opt/retropie/configs/all/runcommand-onstart.sh: line 10: syntax error: unexpected end of file
Parameters:
Executing: bash /home/pi/RetroPie/roms/pc/+Start\ DOSBox.sh "/home/pi/RetroPie/roms/pc/arkanoid.conf"
/etc/timidity/fluidr3_gm.cfg: No such file or directory
timidity: Error reading configuration file.
Please check /etc/timidity/timidity.cfg
DOSBox version SVN
Copyright 2002-2019 DOSBox Team, published under GNU GPL.

CONFIG: Loading primary settings from config file /home/pi/.dosbox/dosbox-SVN.conf
CONFIG: Loading additional settings from config file /home/pi/RetroPie/roms/pc/arkanoid.conf
ALSA:Client initialised [128:0]
MIDI: Opened device:alsa
Two or more joysticks reported, initializing with 2axis
Using joystick Wireless Controller with 6 axes, 13 buttons and 1 hat(s)
Using joystick Wireless Controller with 6 axes, 13 buttons and 1 hat(s)
timidity: no process found
/opt/retropie/configs/all/runcommand-onend.sh: line 10: syntax error: unexpected end of file

I tried both modes DMT 4, CEA 1
still the same.
Thanks
Sim

quicksilver

Something is wrong with the formatting of your scripts. I suspect you have windows style line endings instead of Unix style. Delete your scripts and download and just use mine exactly as they are.

https://mega.nz/folder/ddJTWKaZ#JQV_WCprVMAP77qRnlGmEg

In the future when you write a script that is intended to be used on a Linux machine, make sure you use a program like notepad++ with formating set to Unix.

Simrose

@quicksilver

Thanks I'm just waiting to get a chance to try and will let you know. I was using notepad ++ but didn't change format thanks for the tip. I never experimented with them before.
Sim

Simrose

@quicksilver I am using your scripts and still no good. I can see the script message now and the game does play but the video is small in top left and rest of the screen is a graphical mess. I have no idea why. I really want to get it working.
Thanks Sim

Hello logfile - runcommand-onstart checking in here
dosbox detected - changing video mode to 640x480@60hz
Parameters:
Executing: bash /home/pi/RetroPie/roms/pc/+Start\ DOSBox.sh "/home/pi/RetroPie/roms/pc/arkanoid.conf"
/etc/timidity/fluidr3_gm.cfg: No such file or directory
timidity: Error reading configuration file.
Please check /etc/timidity/timidity.cfg
DOSBox version SVN
Copyright 2002-2019 DOSBox Team, published under GNU GPL.

CONFIG: Loading primary settings from config file /home/pi/.dosbox/dosbox-SVN.conf
CONFIG: Loading additional settings from config file /home/pi/RetroPie/roms/pc/arkanoid.conf
ALSA:Client initialised [128:0]
MIDI: Opened device:alsa
One joystick reported, initializing with 4axis
Using joystick Wireless Controller with 6 axes, 13 buttons and 1 hat(s)
timidity: no process found
Hello logfile - runcommand-onend checking in here
Reverting display back to preferred mode

quicksilver

@Simrose are you using these settings in your arkanoid.conf?

fullscreen = true
fulldouble       = false
fullresolution = original
windowresolution = original
output = surface
autolock         = true
sensitivity      = 100
waitonerror      = true
priority         = higher,normal
usescancodes = false
frameskip = 0
aspect    = true
scaler = normal2x

Also when you post code or configs here on the forums put them in a code block by placing three back ticks (```) above your code and three below it. The back ticks should be on their own lines.

Also when was the last time you updated dosbox?

Simrose

@quicksilver

No I just thought that we just had to change the Dosbox svn like you have it above.

I just updated from source I'll try again then after that I'll try changing the Conf settings for the actual game.

Is that what I should of done before?

Should i keep in dosbox-SVN.conf
fullscreen = true
fulldouble = false
fullresolution = desktop
windowresolution = original
output = overlay
autolock = true
sensitivity = 100
waitonerror = true
priority = higher,normal
mapperfile = mapper-SVN.map
usescancodes = false
frameskip = 0
aspect = true
scaler = normal2x
Or should i restore that file to default and just change in arkanoid.conf

Sorry
Sim

Edit
I added those above values to the arkanoid.conf and now the screen is much to large and doesnt fit into my resolution.

The game runs but i would esitmate the top left corner of the game fills the whole screen.
thanks
Sim

quicksilver

@Simrose try to restore the default dosbox-svn.conf to default and just change those settings in the arkanoid.conf.

I can post the default settings if needed. Or delete the dosbox-svn.conf right before updating dosbox and it should get replaced.

Simrose

I kept the original but that didnt work. I deleted dosbox-svn.conf and now reinstalling so hopefully will work after that.
this is my arkanoid.conf
mount c "/home/pi/RetroPie/roms/pc/.data/arkanoid.pc"
c:
ARKANOID.COM
EXIT
fullscreen = true
fulldouble = false
fullresolution = original
windowresolution = original
output = surface
autolock = true
sensitivity = 100
waitonerror = true
priority = higher,normal
usescancodes = false
frameskip = 0
aspect = true
scaler = normal2x

quicksilver

@Simrose can you post your full arkanoid.conf?

Remember put three back ticks (```) above and below it (no parentheses)

Simrose

@quicksilver said in Dosbox on pi 4, game window is fullscreen but not centered on screen:

[autoexec]
# Lines in this section will be run at startup.
# You can put your MOUNT lines here.

mount c "/home/pi/RetroPie/roms/pc/.data/arkanoid.pc"
c:
ARKANOID.COM
EXIT
fullscreen = true
fulldouble       = false
fullresolution = original
windowresolution = original
output = surface
autolock         = true
sensitivity      = 100
waitonerror      = true
priority         = higher,normal
usescancodes = false
frameskip = 0
aspect    = true
scaler = normal2x