I just bringed back to life my old laptop with Linux Mint 20 and I can honestly say, MT4 works way better on old hardware, than on new hardware with Windows. No more freezing on M1, M5 charts, which is a big surprise to me. The only problem I can see is with this wavy lines from HGI, this got something to do with fact, that Mint do not contain special characters from Windows. I installed Tft-mscorefonts package and this solved problem with fonts, but not with this. Anybody got any solution?

Mint:
Windows: