Unable to rotate Chromium Screen in Autostart

[smartoad]

Creating a bug report/issue

[yes] I have searched the existing open and closed issues

Required Information

• DietPi version
  G_DIETPI_VERSION_CORE=9
  G_DIETPI_VERSION_SUB=12
  G_DIETPI_VERSION_RC=1
  G_GITBRANCH=‘master’
  G_GITOWNER=‘MichaIng’

• Distro version
  bookworm 0

• Kernel version
  Linux DietPi 6.12.25+rpt-rpi-v8 #1 SMP PREEMPT Debian 1:6.12.25-1+rpt1 (2025-04-30) aarch64 GNU/Linux

• Architecture
  arm64

• SBC model
  RPi 4 Model B (aarch64)

• Power supply used: 5V custom supply (checked 5V and high current)

Additional Information (if applicable)

• Waveshare 10.1" screen (https://www.waveshare.com/wiki/10.1inch_DSI_LCD_(C))
• Autostart Chroumium
• set 90 degree in settings - console is 90 degrees, chrom isn’t

Steps to reproduce

1. Set screen rotation to 90 in display settings (dietpi-config)
2. set chromium to autolaunch

Expected behaviour

• Chromium rotate 90 degrees

Actual behaviour

• Console rotates 90d but Chromium doesn’t

Extra details

• I have also tried to follow these instructions to no avail: Unable to rotate & set the correct resolution for Waveshare 7.9inch touchscreen (HDMI version) - #16 by Joly
• Have tried Mate desktop but while that does rotate the screen but the touch panel stops working.
• Also found Chromium Autostart and screen rotation but assume didn’t provide enough information but looks like they are having the same thing happen.

[smartoad]

Going deeper I have found in one of those links the command xrandr -d :0 -o left -s 1280x800 so will look at how I can automate that command as it seems to work but doesn’t stay resident after boot

[smartoad]

So I have been following this issue on GitHub Configure screen resolution/orientation in Kiosk mode. · Issue #7263 · MichaIng/DietPi · GitHub which is the exact problem I have. My work around has been to have the xrandr command run from a cron job and delay it for 60 seconds until everything is loaded

[Totof]

Hello smartoad

Try this

sudo nano /etc/X11/xorg.conf.d/99-rotate_screen.conf

Put this line in the file , save and reboot

Section "Monitor"
        Identifier "Monitor0"
        Option "Rotate" "left"
EndSection

Section "Screen"
        Identifier "Screen0"
        Device "Card0"
        Monitor "Monitor0"
EndSection

Work with 7"9 waveshare touchscreen

Tell us if it works for you

[smartoad]

Hi Totof,

Thanks for the tip, tried but unfortunately didn’t work I’m afraid Just to check, the file used with the nano command was a fresh file and had nothign else in it?

[Totof]

Hi
Yes it’s a empty file, you must fill it with the line, save and reboot

Perhaps modifying some part like card1 instead card0