I’ve had a number of tablets and small “laptops”. Right now, I’ve
booted Haiku OS on my GPD Pocket. These kinds of devices start the
screen in portrait mode, so the contents are sideways. This screen is
1200x1920 instead of 1920x1200. It is running the VESA driver.
Is it possible to rotate the screen? I don’t see anything in the Screen
Preference.
Same issue with my GPD Win,I think I’ve already mentioned that years ago.
These devices are super tiny and do in fact use a portrait-mode phone screen,so it needs to be rotated by the software.
The BIOS/UEFI menu is also shown in wrong orientation there.
GPU have support for that.
If it has to be done in software, for framebuffer driver , iirc it comes with notable performance impact. From memory Be faced such issue with their BeIA implementation…