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I am unable to find a .tcz in APP gui call "graphics-KERNEL" ...
tce-load -w graphics-KERNEL
And if you are on Virtualbox, you also can change the Max Screen Size there.This instructions is taken from the web:1. Go to File > Preferences2. Go to Display3. Change Maximum Guest Screen Size to Hint or to None.4. Enter 1920 x 1080 as a width and height.5. Restart the virtual machine and voila! It just shows the right resolution.
Did you use tc-install-GUI to install tinycore to the vm hard drive?