DOSBox on Ubuntu tablet - going fullscreen on a cloned display

[XSportSeeker]

Hey guys, new to the forum, sorry if this is the wrong place.

Specific problem here. I have a Dell Venue 11 tablet (former Windows 8) running Ubuntu with RetroPie installed on top. ROMs running on an external HDD with the roms directory serving as mounting point.
Display is cloned to a bigger fullHD TV via miniHDMI out.

I'm trying to run DOSBox games on it and everything worked well on tests so far... only the games run in a small window instead of going fullscreen. Sound is working fine that way.

If I try the standard alt+return to go fullscreen, DOSBox reconfigures the display... it turns screen cloning off, goes back to the tablet display only, and then goes fullscreen.

Then I tried a dual monitor setup with the TV as main panel and tablet as secondary, but it doesn't help... DOSBox still turns HDMI output off, goes fullscreen on the tablet display only.

Is there a way to configure DOSBox into Retropie to go fullscreen automatically and preserve configurations like the screen cloning or at least run fullscreen on an HDMI output?

Other consoles work fine without any fine tuning, this must be specific to DOSBox.

I'm kind of a newbie to everything in this, found some stuff on the "+Start DOSBox.sh", and some alternative ways to try to mess with configuration, but I'm not sure about parameters and what exactly I should try for this particular problem.

Sorry if it's some lame question, and thanks in advance! :D

[XSportSeeker]

@xsportseeker
agh! Nevermind that... I found the dosbox config file and it seems to be solving my problem!
Duh, like I said, newbie. :/

[edmaul69]

@xsportseeker well i guess i read that all for nothing!! :) yeah im glad i read your second post because i was about to point you to that file. Glad you got it working. If you are interested in making .sh files to have all dos games show up in the gamelist or any other configuring help in dosbox feel free to ask.