1) Would any of you here by any chance know a solution to this issue: https://forums.linuxmint.com/viewtopic.php?f=90&t=309375&sid=81edfe3451d426923a49eacfd4f994cb
It's the single thing which really messes up my experience so far. Having to scroll to the end if I want to run a program that starts with a letter from the end of the alphabet. Is there no way to display all programs at once? It doesn't have to be exactly like the classical windows menu, just a way that gives me a full list without scrolling.
If not, anything similar. Any workarounds, applets, third party tools, anything?
As you already found out, there used to be a classic style menu under applets, but it doesn't seem to be available any more. I'm sure it'll return eventually though as there seems to be demand for it.
Personally I don't mind the default menu (search is very fast & anything I want more immediate access to I put on the desktop), but it's a matter of personal preference I guess.
2) About installing programs. I've set up my installation so the 45GB partition is mounted as root, while the 130GB is mounted as /home, because I was under the impression that the root one will just contain the OS, while /home is where all the user's installed programs will go.
However, all programs installed from the Install Manager go to the root partition. I understand that it goes to /usr /lib /etc folders and so on, but this means that slowly but steadily my root partition is getting filled up, while my home partition has... nothing.
I've got only 30GB free on the root one, and I haven't installed any games yet. Once the games start arriving, at this rate I'll run out of space real soon.
Is there anything that can be done that doesn't involve reinstalling from scratch?
45GB will most likely be plenty. Stuff installed from the repositories (or via .deb packages) is installed to fixed locations but GOG games are installed to wherever you want them (as long as the current user has write permission for the location you want to install to - on a related note, never run GOG installers as root). Similarly, Steam will install to whereever you set your library path(s) to (the default path is ~/.steam/steam/steamapps).
So in the week that I have been using it, the system froze on me 3 times now. Hope it's not a sign of things to come. None of the times I was doing anything special in particular. I was playing with settings in two of them (though at the time of free I wasn't changing any setting; just happened in the middle of reading). The third time it happened I was browsing Linux Mint forums on Firefox.
No error messages or anything. Just a complete freeze. Mouse and keyboard not responding.
Is there anything one can try doing in such a case? I just did a hard reset.
I would suspect something driver related. When I've had this happen to me before it's almost always been due to broken graphics drivers (the open drivers for Nvidia graphics cards in particular have a tendency for doing this). The other times have been due to issues with the hardware itself, e.g. the defect that affected some first gen Ryzen CPUs (and in that case I had to RMA my R7 1700 & get a replacement).
If you're running an Nvidia GPU, add the proprietary drivers PPA then install the latest available Nvidia driver; if you're running an AMD or Intel GPU then you should add Kisak's stable Mesa PPA and then simply update your system. Also make sure you're running the latest available kernel (5.3.0-26 at the time of writing).
As Gydion posted, if it's possible to do so then using 'Magic SysRq' to force a more controlled reboot of the system is better than a hard reset.