What problem report file? I have no problem but I don't know how to enable HiDPI mode.
then maybe SwitchResX software may help you, not used it myself thoughThat sadly doesn't work. The Surface Display is recognized as an external display though.
it should have an icon on your bar at the top where you can change resolutionsAlso didn't work. There are not any other resolutions showing up in settings.
okI thought it should show up under Settings -> Display. I'll go see if it's in the bar right now.