How to do N2 HDMI screen rotation

[potato1992]

I have a 7 inch 1024x600 waveshare touch sreen with VID and PID as 0x0eef:0x0005, working perfect with N2 ubuntu.
I wondered if there is anyway I could rotate the screen by 90/180/270, since I could not do it in the display settings menu (only one option "no rotation" could be selected).
I see one topic:
viewtopic.php?f=97&t=18193#p120549

But there is no /etc/X11/xorg.conf file in my system.....
Anyone knows how could I achieve it?

[odroid]

If you use Ubuntu 18.04, you need to create a xconf file under /usr/share/X11/xorg.conf.d/
viewtopic.php?f=136&t=34097&p=253694#p248459

sudo nano /usr/share/X11/xorg.conf.d/99-odroidn2.conf

And paste the following items and save it.

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# This is a minimal sample config file, which can be copied to
# /etc/X11/xorg.conf in order to make the Xorg server pick up
# and load xf86-video-fbturbo driver installed in the system.
#
# When troubleshooting, check /var/log/Xorg.0.log for the debugging
# output and error messages.
#
# Run "man fbturbo" to get additional information about the extra
# configuration options for tuning the driver.

Section "Device"
        Identifier      "FBTURBO"
        Driver          "fbturbo"
        Option          "fbdev" "/dev/fb0"
        Option          "Rotate" "CCW"
        Option          "SwapbuffersWait" "true"
        Option          "alpha_swap" "true"
EndSection

And restart the desktop.

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sudo service lightdm restart

You will get portrait display rotated by 270 degree (CCW).

[davidix68]

Hello, we're working on N2+ fresh installed from wiki odroid to Ubuntu 22.04 (MATE DESKTOP) and updated. When we add Option "Rotate" "CCW" to the 99-odroidn2.conf file, when we restart the service the screen remains blank (black) and lightdm don't restart.
To integrate this device in the place of the C4 we need to be able to work in portrait mode. We tried every other solution using xrandr without success
Any help ?

Thanks

[Niaz]

Same in here. CW or CCW does nothing.

[Niaz]

Reinstalled with different OS (DietPi) and rotating works with Mate (through GUI menu) and LXDE (through xrandr).

[mdrjr]

For ODROID-N2/N2L/C4/GOU

To rotate the screen you have to change the /media/boot/boot.ini file.

You'll see a line starting with:

# Boot Args
setenv bootargs "......

Between the " " from that you have to add fbcon=rotate:3

Valid options are:

0 - normal orientation (0 degree)
1 - clockwise orientation (90 degrees)
2 - upside down orientation (180 degrees)
3 - counterclockwise orientation (270 degrees)

[Niaz]

Isn't fbcon for rotating console, if you don't run X?

[meveric]

If you use an upstream image with Panfrost support you can easily rotate display with xrandr as you would do on any normal PC.
Not sure if the waveshare touch screen is fully supported though.

But with upstream image and panfrost support you can easy type:

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xrandr --output HDMI-1 --rotate left

and the display turns around.

You can even add an xorg config like this:

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cat /etc/X11/xorg.conf.d/10-monitor.conf 
Section "Monitor"
	Identifier	"HDMI-1"
	Option		"Rotate"		"left"
EndSection

which would rotate the screen every time an XServer is started.

[mdrjr]

Isn't fbcon for rotating console, if you don't run X?

That is correct!

For X rotation on N2:

edit: /usr/share/X11/xorg.conf.d/99-odroidc2.conf

change driver to fbdev and add option rotate like below.

Section "Device"
Identifier "FBTURBO"
Driver "fbdev"
Option "fbdev" "/dev/fb0"
Option "rotate" "CW"
Option "SwapbuffersWait" "true"
Option "alpha_swap" "true"
EndSection

That will do the trick!