I tested openmsx 15 for windows.. it stretched fullscreen even with scale 1x...
So I made a clean new install of armbian and installed openmsx 15 source to compile it. Installed all required libraries...compiled the source.. after running it..it is very slow on 2x.. better in 1x...but it wont reach 50fps..it is 35 fps..
Also on armbian it didnt stretch full screen in 1x or 2x...
On armbian..openmsx 17 stretched fullscreen but was very slow even after disabling everything like vsync and reverse bar..
I tried bluemsx core on retro orange pi...it was fast..but the problem it wont run disks or cas..also it is not good as openmsx but it was fast on android tv box..
I tried MESS emulator too..it was slow too...
This appears when running openmsx
https://ibb.co/4VppNz1
And this is openmsx 15 at 1x fullscreen
https://ibb.co/VVrY0jq
Openmsx 12 is fast on android tv box...but openmsx 15 not...
Openmsx 12 on pc..stretched full screen even on 1x and 2x...
Openmsx 13 on rpi stretched full screen on 2x only...in 1x it wont stretch..
It is Raspbian and Armbian issue of scaling ...
Try to change the renderer setting between SDLGL-PP and SDL. Try both to see which is the fastest on that system. Use the newest version possible.
how to switch between the two renderers?? i am not finding anything about it in google..
i got it..it is from openmsx command line...will do it and report..thanks
Compiling openmsx 15 and making renderer as SDL resulted in 50 fps on 1x and 2x...but unfortunatly no stretching...
Compiled openmsx 17..making renderer SDL or SDLGL-PP ... yet it is the same slow result... but stretching on 1x and 2x is good.
In openmsx 17...without fullscreen it is 35 fps both sdl and sdlgl pp..when full screen..it drops to 3 fps..
Seems like we will never have fullscreen fast openmsx on cheap machines
there is one solution to this issue I used but it comes with a downside, I set Armbian resolution to 480P, I think 480X480, the screen become low res and openmsx works full screen at 2X scale, the downside is openmsx's sub menus font becomes not understandable, The main menu (load rom, video, etc...) is clear and readable, but when selecting load rom for example, the sub menu has smaller font and it is not so readable, any idea to set sub menu font size bigger to solve this issue??
"mali_drm" is the GPU driver, so if that doesn't load, you probably don't have accelerated OpenGL. Or maybe no OpenGL at all: what does "set renderer" print after you try to switch to "SDLGL-PP"? It's possible the switch fails and it falls back to the "SDL" renderer.
What hardware are you running on? Do you have the "mali" driver packages installed?