Bad resolution on HP TouchSmart 600 all-in-one

[Yorgos Kourtakis]

I’ve installed Debian 10 Buster with Xfce with the option acpi=off, because no video was available without this option.
The video hw is nVIDIA GT218M [GeForce G210M], but the suggested driver, nvidia-legacy-340xx-driver, hangs the computer, so I use nouveau driver.
The problem is the higher resolution, limited to 1280x720, instead of 1920x1080 available for this 22” screen!
Any suggestion?
Thanks for your help
YK