Does not work but with Full HD

I have some VGA adapters from different manufacturers in use, because I'm too lazy to scrap my existing VGA cable collection, even if it goes like this. I use a 21.5 "full HD monitor and an old 17" -1280x1024 monitor. For the latter, this adapter does not work wonderfully and with no problems, but for the former, because the adapter does not support full HD resolution (more specifically is nothing like 1600x1200). I do not know why that is, all other adapters display this resolution. On another computer, this adapter was even completely unusable, because for some reason recognized the graphics card does not, what resolution of monitor should get, and the monitor was black. It helped another adapter. Pity!

I know that one should not complain for few euros, but if someone wants to use a large monitor, then he needs another adapter!