Don't filter out low resolution video modes as they are used for gaming

[mmu_man]

The VESA code in the bootloader filters out resolutions lower than 640 pixels width. While they aren't really usable for Haiku itself, some emulators like BeMAME can make use of them when going full-screen.

cf. ​https://git.haiku-os.org/haiku/tree/src/system/boot/platform/bios_ia32/video.cpp#n502

Should we just remove this limitation or add a kernel setting to do it?

[pulkomandy]

We can remove the limitation, but we may need to rework the Screen preferences a bit if the list of available modes becomes too long?

[AlienSoldier]

Yes, it can become too long. One ridiculous list i have in mind is the Amiga list with all the custom mode added or all the different interlace-PAL-NTSC combo etc...

Perhaps a collapsable list with the name "legacy resolution". Or (if the current resolution allow to display it), This interface ​https://en.wikipedia.org/wiki/File:Vector_Video_Standards2.svg instead of a simple list would give more information.

[korli]

Could be of interest: ​https://review.haiku-os.org/c/haiku/+/5320

[nephele]

Wouldn't it make more sense to add a flag to the fullscreen window and let the emulator set this resolution itself directly? if ghe window with the flag is destroyed the app_server could then restore the resolution on it's own.

[pulkomandy]

That's the point of this ticket, currently the driver filters out these resolutions and it's not possible to set them from an app, no matter how hard you try.

This shouldn't be the case, the driver should do whatever is asked by apps.

If there is any filtering needed it could be done in screen preferences, but really I don't see why we should prevent people to run Haiku in 320x200 if that's what they want?

[nephele]

We should only display resolutions in the screen preflet we know haikus UI can run properly with, we already mention a minimum required resolution in the release notes. some apps will not fit on screen with the default font size otherwise (for example preferences/locale)