PHDM rescue disc displayed in VGA mode with Dell QHD+ display

Using PHDM17 rescue disc, I boot into Dell XPS 13 notebook with QHD+ display. PHDM17 seems to only display in VGA i.e. half-screen is displayed and I couldn't reach the right part of the screen regardless how I moved or clicked the mouse.

It works OK with FHD+ screen.

Please rectify this.

Thanks

Correction. PHDM17 rescue disc, does not work with FHD+ screen as well.

Basically a useless piece of rescue disc software for any newer notebook.