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I have a Raspberry Pi 2 B connected to a RIF6 projector via HDMI. My goal is to flip the video 180 degrees while the OS is running. I have researched this and found that xrandr should be the way to go. If I run

DISPLAY=:0 xrandr It returns:

xrandr: Failed to get size of gamma for output default
Screen 0: minimum 1136 x 592, current 1136 x 592, maximum 1136 x 592
default connected 1136x592+0+0 0mm x 0mm
   1136x592        0.0*

This would seem to indicate the display 0 is the one I want to rotate.

I have tried many variants to this but I believe the proper command should be:

sudo xrandr --output 0 --rotate left

But the response I get is:

Can't open display

OR I have tried: DISPLAY=:0 xrandr --output 0 --rotate left

Which returns:

xrandr: Failed to get size of gamma for output default
warning: output 0 not found; ignoring

Has anybody successfully achieved rotating the video without restarting the RPi?

Patrick Cook
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user40525
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1 Answers1

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Unfortunately this is not possible. xrandr does not work as the display code is in the GPU. See configure monitor to allow rotation and an answer for what is possible.

Community
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Milliways
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