Android 7.1 64bit on Onda V820W V1.1, screen rotation and touch work incorrectly.

[konata2021]

Hey everyone, I'm trying to install Android x86 7.1 (64bit) on my V820W, a tablet manufactured by ONDA, a Chinese company. Seems most of the component in system work perfectly, but screen rotation and touch still not work incorrectly, And when I enable the auto-rotation function, the screen always 90 degrees different. After reading some posts in this community I found two properties that seem can use to solve this problem.

- hal.sensors.iio.accel.matrix

- ro.iio.accel.[x/y/z].opt_scale

but IDK what's the meaning of these two properties, and I'm trying to change the value of `hal.sensors.iio.accel.matrix` (by writing these values to `build.prop`)  but seems not to have any effect. Does someone know how to adjust these two values or other ways to solve this problem? Thank you.