Hi! Just to get this one clarified, could anyone else give a try for if X driven by WSFB (that's EFIFB of UEFI) can do screen rotation?
So the steps are, UEFI-boot OpenBSD 6.1 AMD64, use this /etc/X11/xorg.conf : Section "Device" Identifier "Card0" Driver "wsfb" EndSection Start X (startx) and run "xrandr -o left" from the xterm. Please tell here if it works. (You could try "xrandr --output default --rotate left" too (or in place of "default", whatever name "xrandr" shows that your output has).) If it works, great! And I'd need to figure why it not worked for me. If not, also great, and I'll look into the WSFB driver sources. WSFB's sourcecode is https://cvsweb.openbsd.org/cgi-bin/cvsweb/xenocara/driver/xf86-video-wsfb/src/wsfb_driver.c?rev=1.36&content-type=text/x-cvsweb-markup , last updated 2014, I don't see anything obvious about it so that it not would support orientation/rotation, however also i presently have no idea what to look for. Thanks! Tinker