I had been running an older version of LibreElec with the Leia version for a while now. It's actually running off of the USB hard drive, with no SD card at all. The same hard drive contains my KODI library.
I just followed the instructions to update to the latest version of LibreElec and Kodi. I downloaded the file LibreELEC-RPi4.arm-9.95.2.img.gz and copied it (using ssh) to the /storage/.update folder. When I rebooted, it looked like it went thru the upgrade successfully, and then rebooted itself again at the end. I saw the rainbow color box, but that 's it. Nothing else but a a completely black screen (and my monitor eventually goes into power save because of no signal).
I did notice that the screen said that it found an "incompatible config.txt file" that it copied to config.txt.old. When I look at the files (thru the ssh connection that still works), I see that it changed the gpu_mem from my old value of 320 back to 76. I don't see any other changes in that file.
Known issue with latest Matrix build of Kodi? Any recommendations on how to recover this? Thanks much!!!
Oh - and after a couple more reboots, even ssh no longer connects! 
