I'm going to answer my own post:
I purchased one of these, and it's absolutely perfect for 4k120hz!
Kodi gui is such a breeze and feels entirely new 
You might want to try installing kodi21 from RPiOS which supports wayland, and much like Xorg on the PC, allows the compositor (outside of Kodi's knowledge) to rotate the screen.
Note that this will use EGL for composition, rather than DRM which is a less efficient path. It should be fine for 1080p60, but will struggle with 4K video.
But you can give it a try quite easily, to see if it meets your requirements. Use the preferenced/screen configuration tool (from the desktop) to set the display rotation, then launch kodi (the desktop version, not the fullscreen version). You can switch the desktop kodi to use fullscreen when running.
To sum up; Popcornmix' solution with running kodi from rotated RPiOS (without LE then) is a verified working solution for this problem. 
Hi,
So, reading a lot of different posts about this theme havent really made me any wiser, so i wanted to create this thread to ask users to post their set-up that has a verified working 4k120 LE GUI active.
I simply love the fluent gui "flow" at 120hz. I understand that like 99% of video material is 23.99 or 25 etc, but i would like to test my tv setup with 120hz video files etc to see the full potential (ok ok - to brag to friends )
Now, i don't wanna spend mucho dineros on hw just to find out it's not actually working...
So i ask; Has anyone been able to do this, and could you please post your HW setup here?
RPiOS and an image viewer for slideshows? Or a slideshow screensaver? Don't know if for that you should use Kodi...
Pretty simple stuff actually.
I made a script that autostarts a slideshow when kodi starts. It can use pictures/videos from a local folder or an SMB/FTP share too.
Very stable solution - one of them has been running for 3 years continously in october
Indeed; i was looking for a 90' rotation.
I've set up some screens in the reception at my office with slideshows that use a 90' rotation.
Until recently i've used a small pc to push the slideshow using the Legacy Libreelec installation that supports xrandr, but have replaced the 0' ones with raspberrys
Hi all,
Wanted to check if anyone have been able to figure out how to rotate HDMI output on the Raspberry Pi 5?
Been trying edits of both config.txt and cmdline.txt without much results...
Using LibreELEC 12.2
Using LibreELEC-Generic-legacy.x86_64-12.0.2.img works for me.
Thanks for all tips
Also, 90 doesnt work at all, but 180 do.
chewitt Did some testing, and got "half way there"
Edited syslinux.cfg as you instructed. Thing is; the LibreELEC bootlogo is rotated, but immediately after the main Kodi GUI starts, it's rotated back to the inititial 0 degrees rotation...
Excellent!
Thanks for this - will test it out asap!
Hi All,
Searched without finding a proper matching issue so creating a new thread about this one.
I've run a automatic slideshow with vertical screens with LE9 for years. Now it's time to upgrade to 12 (about friggin time lol).
I used to do "xrandr --output DP3 --rotate left" in autostart.sh, but i understand that xrandr is now gone from the distros.
So therein lies the dilemma; Does LE12 no longer support screen rotation at all?
Any way of sudo'ing back xrandr maybe?
Thankful for all replies.
Hi.
LibreELEC 7.90.009 With Kodi 17.0-BETA6
Guys - i cant find the "allow file renaming and deletion" settings in Kodi anymore.
I even tried changing the option allowfiledeletion in guisettings.xml to TRUE, but it defaults back to FALSE after reboot, and no Delete option in the context menu in the file lists.
Any ideas anyone?
S
