alphanumeric wrote: ↑
Sun Sep 22, 2019 10:06 pm
gkaiseril wrote: ↑
Sun Sep 22, 2019 8:03 pm
Edit the config.txt file to rotate the LCD screen 180 degrees.
Documentation - Configuration - Config.txt - Video
Scroll down to the section "LCD display/touchscreen options" for the lcd-rotate for values to rotate the image 0, 90, 180, or 270 degrees. Note this setting does not affect the HDMI or composite video outputs. Also only one video output can work at any time.
If you do that, flipping the display 180 degrees, you compromise / effect the viewing angle of the display. Thats doable but not all that desirable for some setups. As far as I know the viewing angle is optimised for the display being right side up.
Why some stands flip it is so the Pi's Power jack is pointing up and not pointing down, to make it easier to plug in your power supply.
Everything I've read agrees with what you said. So which way is up? Does this drawing show the correct orientation? https://www.raspberrypi.org/documentati ... 092015.pdf
where it says "VIEWING ORIENTATION" with the arrow pointing up thus the flex ribbon cable comes off in a downward direction?
I designed a custom case for the display for a project relying on that drawing and now I'm I'm seeing cases designed with the ribbon cable coming off the top indicating the display is rotated 180 degrees. And if I can believe the documentation that then makes the optimal viewing angle from below and not above.
I've also seen reports that "lcd_rotate=2" does not work, granted the posts were old, but that then would be a problem if the drawing's documented "VIEWING ORIENTATION" for optimal viewing angle being from above did make the display upside down.
I've also seen old posts where a firmware change made the default orientation flip 180 degrees and some cited that was done because manufacturers made the cases wrong.
Hard to know what to believe.
So which way is "UP" for optimal viewing angle being from above, ribbon cable going down like the drawing shows? Or ribbon cable going up?