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FIREFLY-RK3399-UBUNTU-20.04 GUI info 

root@firefly:~# cat /proc/version
Linux version 4.4.194+ (jincheng@jincheng-PC) (local/internal-gitlab/rk3399/firefly: 44a8d8fabe4b94d62ed24e19b7946084a0a5fe29) (gcc version 6.3.1 20170404 (Linaro GCC 6.3-2017.05) ) #3 SMP Thu Sep 9 14:41:07 CST 2021
root@firefly:~#
root@firefly:~# cat /etc/^C
root@firefly:~# cat /etc/issue
Ubuntu 20.04.3 LTS \n \l


firefly@firefly:~$ echo $XDG_SESSION_TYPE
x11
firefly@firefly:~$



firefly@firefly:~$ xdriinfo
libGL error: failed to create dri screen
libGL error: failed to load driver: rockchip
libGL error: failed to create dri screen
libGL error: failed to load driver: rockchip
Screen 0: swrast
firefly@firefly:~$ tty
/dev/pts/3
firefly@firefly:~$



irefly@firefly:~$ glmark2-es2-drm
arm_release_ver of this libmali is 'r18p0-01rel0', rk_so_ver is '4'.arm_release_ver of this libmali is 'r18p0-01rel0', rk_so_ver is '4'.=======================================================
    glmark2 2021.02
=======================================================
    OpenGL Information
    GL_VENDOR:     ARM
    GL_RENDERER:   Mali-T860
    GL_VERSION:    OpenGL ES 3.2 v1.r18p0-01rel0.5cb5681058e8e076ff89747c20c32578
=======================================================
[build] use-vbo=false: FPS: 60 FrameTime: 16.667 ms
[build] use-vbo=true: FPS: 60 FrameTime: 16.667 ms
[texture] texture-filter=nearest: FPS: 60 FrameTime: 16.667 ms
[texture] texture-filter=linear:^C FPS: 60 FrameTime: 16.667 ms
=======================================================
                                  glmark2 Score: 60
=======================================================