Thanks to viewtopic.php?f=38&t=79330 - I've successfully setup a Raspberry Pi 2 display to a Dell P2715Q in 3840x2160. My /boot/config.txt looks like:
If I add "display_rotate=1", it no longer boots (the green LED blinks a couple of times, but nothing is displayed on the monitor and I'm unable to connect to it over the network). I've tried upping the gpu_mem to 640, but I have the same problem.
Code: Select all
disable_overscan=1 hdmi_ignore_edid=0xa5000080 hdmi_group=2 hdmi_mode=87 hdmi_timings=3840 1 48 32 80 2160 1 3 5 54 0 0 0 28 0 248140000 3 framebuffer_width=3840 framebuffer_height=2160 framebuffer_depth=24 max_framebuffer_width=3840 max_framebuffer_height=2160 gpu_mem=256 hdmi_pixel_freq_limit=400000000
I don't need the console rotated, just rotating X would work too. However, I wasn't successful with xrandr either.
Any suggestions (or ideas as to why it won't boot with display_rotate=1)?