@gargoyle73 said in Vertical Screen Rotation on RP4 400 HELP:

SO what interface do I use to read and alter MAME configs? Can you walk me through steps?

Start the 'File Manager' (mc - Midnight Commander) from the RetroPie system. It has an interface similar to the old Norton Commander, which allows you to browse the filesystem and operate on files/folders. Go to the folder where the retroarch.cfg is located (/opt/retropie/configs/all/) and modify the file by selecting it and pressing F4. This will start an editor, from which you can modify the file and save it afterwords.

There are lots of links with documentation/videos on how to use Midnight Commander - see for instance https://www.tecmint.com/midnight-commander-a-console-based-file-manager-for-linux/ or https://www.linode.com/docs/guides/how-to-install-midnight-commander/.

@mitu xrandr doesn't do anything if I put it there; it only does anything if I use a modified runcommand script

@sheridan please do not mention ROM sites. Read the sticky topics before posting.

@nemo93 NP, thanks for sorting this out. As stated earlier the whole testrun was anticipatory for the time when kernel 4.19 is discontinued. So still a few years development time for full KMS.

TIL that there is an option in lr-desmume which has not yet been ported to lr-desmume2015. Thus there is another option to solve this issue. :)

@mitu said in Emulation station going off the screen:

Please add some info about your setup, as detailed in https://retropie.org.uk/forum/topic/3/read-this-first.
Are you starting EmulationStation rotated also ?

Yes.