I am not quite sure why this has started to happen? My Main Linux PC is currently my old AMD 9590 with an ATI RX480 and 32GB RAM. It has Kubuntu 20.04 installed as of a few days ago, however I was having the same issue with Mint Cinnamon 19.3 and KUbuntu 19.10 and also Fedora KDE 31 before that, in that order. I have it setup fairly simply sda = 240GB SSD as / sdb = 2TB HD as /home sdc = 2TB HD as /home/data I have a folder thats currently /home/data/Steam and I have that setup as the default downlaod folder for the steam games. I might also add, that my Linux Laptop is setup in exactly the same way. Now, at this time I would also say, that the software packaging has 3 versions of STEAM on it,. plus I have also tried the downloaded version from steampowered and one version does NOT see the extra /home/data mounted drive, so thats a problem, but the others do. I have also gone through the folders, looking for the older steam files.. The list is given in the .deb installer, and I have manually removed each and every file and folder manually to make sure that I got rid of everything, including the two in the home folder itself. But what happens, is that I install steam, and I click on the game, and after a few moments, of it clearly doing something, the play button lights up again, showing me that its ready to play.. I click it and it repeats itself. Its just cycling about. Normally, I just use tha same files, but I have now uninstalled and reinstalled the offending games and no, its made no difference? The Laptop is fully working though? So, I copied the fiels from the laptop to the desktop, but its still wont work? The ONLY difference that will make any possible reason for it to fail is that the Desktop is on an AMD CPU & GPU and the Laptop is Intel / nVidia The CPU wont be anything, but the GPU? Im going to have to try plopping an nVidia into it sometime to try that, but its not easy for me. Anyone have any thoughts?