Hi. I just installed ubuntu-mate-desktop into my Ubuntu 20.04 (64-bit) system, and up on reboot chose to try out MATE. However, I have 3 folders load at startup in all my DEs (via the usual Startup Applications), but upon logging into MATE, it just goes berserk loading those 3 folders non-stop, till the point the taskbar has a series of dots within about 10 seconds. And it just keeps on going. When I manage to get Alt+F2 up to caja -q, and the folders are killed, it just starts all over again, non-stop. I've never seen anything like this. If I try to get anywhere, try to get in to the system menu, bring the run dialogue up, anything, the folder just cover them. The furious disk activity during this does not cease when I manage to log out, and is still going when at the greeter, so I am forced to reboot. I've done this 3 times, and it just keeps happening.
I can't see what the issue is - it's only 3 folders opening in Caja upon login, and does exactly that in KDE or Gnome - but MATE is stuck in this loop, and even restarts it when I manage to kill Caja.
Any ideas what is going on, or how I can fix it? Obviously, I can't do it in MATE, as it is totally unusable, but if there are config files I can edit or something, I can do that from within KDE. Actually, I suppose I can disable those folders from loading at startup in KDE before I log out to try MATE, but still need some guidance on how to rectify this bizarre behaviour when logging in. Hope you can help, as I would really like to give this DE a try.
WORKAROUND UPDATE: I edited the .desktop file for each of the folder launchers in ~/.config/autostart to specify the following:
Now, the MATE desktop loads without that bizarre behaviour (because MATE is not trying to launch Caja), and I can continue to load those folders in KDE and Gnome. It's a small price to pay to have to manually load those folders in MATE, but I have to say MATE having such a problem with it's own file manager, when other DEs don't, is pretty disappointing. i Would still like someone with some expertise to shed some light on this, because I fear this will probably start all over again if I create autostart entries for Caja within MATE.