With some laptops like the one in the Getting XIDU PhilBook Max to Play Nice with Linux tutorial there can be a different offset than the standard one that is expected.
In order to avoid staring at the screen at right angles (to the detriment of both your neck and sense of orientation) we must make some changes to the configuration file for the orientation matrix in the distro. In the previous tutorial we covered a situation where the distribution didn’t support automatic rotation out of the box; now we cover a situation where the distro does support it.
First lets fix the head cranking temporarily so we can keep our sanity as we do this
xrandr -o normal
First lets get the driver name
sudo udevadm info -n /dev/iio:device0
Now lets get the vendor and product name
sudo dmidecode | grep Manufacturer sudo dmidecode | grep Product
Now we need to replace the information into the brackets in the string below
sensor:modalias:acpi:[driver name]*:dmi:*:svn[Manufacturer]:pn[Product Name]:* ACCEL_MOUNT_MATRIX=0, 1, 0; 1, 0, 0; 0, 0, 1
In our case we end up with (using * as wildcards)
sensor:modalias:acpi:*KIOX010A*:dmi:*:svn*:pn*XN141A*:* ACCEL_MOUNT_MATRIX=0, 1, 0; 1, 0, 0; 0, 0, 1
Where ACCEL_MOUNT_MATRIX is the transformation matrix that represents our orientation
Now lets add it to the end of our list of display rotations, to do this we follow the instructions at the top of the /usr/lib/udev/hwdb.d/60-sensor.hwdb
sudo nano /etc/udev/hwdb.d/61-sensor.hwdb
Paste in the string you made above, and save
Now we need to get the system to adopt the changes
sudo systemd-hwdb update sudo udevadm trigger -v -p DEVNAME=/dev/iio:device0 sudo service iio-sensor-proxy restart
Now the screen should rotate as expected!
Remember this was for my specific laptop and the transformation matrix necessary for your laptop may be different.