After install, resolution might be off. Xrandr might so something like this:

xrandr: Failed to get size of gamma for output default
Screen 0: minimum 1024 x 768, current 1024 x 768, maximum 1024 x 768
default connected 1024×768+0+0 0mm x 0mm
1024×768 76.00*

Step 1: Grub resolution is wrong (optional)

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