postmarketOS

Screen Calibration

Framebuffer

On most Android devices, a somewhat working framebuffer is required to get Weston and other Wayland compositors running. The alternative to framebuffer would be [[DRI|Glossary#dri]].

If your framebuffer does not work out of the box, try the following: Run this to set the framebuffer resolution: cat /sys/class/graphics/fb0/modes > /sys/class/graphics/fb0/mode Boot TWRP/Android and read out the correct framebuffer configurations from the /sys... paths and try to set them in pmOS * If you made it work, create an initfs hook, that instantly sets the framebuffer right. Example

Weston

• Make sure, that Weston runs on the device
• Look in /tmp/weston.log (via SSH) for the touch device name. For lg-mako, the name is touch_dev, but it may be different for your device.
• Copy 90-android-touch-dev.rules from device-lg-mako to your device's aport. Replace touch_dev with your touch device name. Adjust the APKBUILD, so it gets installed properly (Example)
• This calibration may just work fine (it has been reported, that it works on hammerhead). If it does, you are done here. Otherwise continue for the calibration.
• Connect to your phone via SSH
• Get a root shell: sudo su - (Because right now, Weston runs as root)
• Run weston-calibrator as root
• Adjust your udev rules-file to the output from weston-calibrator