# Validate OpenGL Source: [https://docs.qualcomm.com/doc/80-88500-3/topic/11_Validate_OpenGL.html](https://docs.qualcomm.com/doc/80-88500-3/topic/11_Validate_OpenGL.html) The source code of the sample triangle application for rendering on screen is available at <workspace/display/weston/clients/simple-egl.c>. To run the sample application, ensure that Weston is launched, and use the following commands: - Linux Ubuntu: adb rootCopy to clipboard adb remountCopy to clipboard adb shell mount -o remount,rw /Copy to clipboard adb shell export XDG_RUNTIME_DIR=/run/user/root Copy to clipboard cd /usr/bin/Copy to clipboard ./weston-simple-eglCopy to clipboard - Linux Embedded: adb rootCopy to clipboard adb remountCopy to clipboard adb shell mount -o remount,rw /Copy to clipboard export WAYLAND_DISPLAY=wayland-1Copy to clipboard adb shell export XDG_RUNTIME_DIR=/run/user/root Copy to clipboard cd /usr/bin/Copy to clipboard ./weston-simple-eglCopy to clipboard **Parent Topic:** [Configure graphics settings](https://docs.qualcomm.com/doc/80-88500-3/topic/9_Configure_graphics_settings.html) Last Published: Sep 26, 2023 [Previous Topic Verify Weston](https://docs.qualcomm.com/bundle/publicresource/80-88500-3/topics/10_Verify_Weston.md) [Next Topic Verify GPU usage](https://docs.qualcomm.com/bundle/publicresource/80-88500-3/topics/12_Check_GPU_usage.md)