Thanks for detailed reply! I tried out xrandr, it did the trick that I got 1920x1080 resolution. HOWEVER, I found still the problem: I can only got 1366x768 region "usable" on my monitor, which means, when I start out any application, for example konsole, chromium, whatever, they were displayed in a 1366x768 region and the rest region was black. Strange thing is, I can move my mouse cursor out of that region into the dark region... maybe I should read more articles on xrandr... Thx!
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