LibreELEC:~ # retroarch -L /path/to/libretro/core.so --verbose
[INFO] RetroArch 1.7.0 (Git 12cf1bf)
[INFO] === Build =======================================
Capabilities: MMX MMXEXT SSE1 SSE2 SSE3 SSSE3
Built: Feb  7 2018
[INFO] Version: 1.7.0
[INFO] Git: 12cf1bf
[INFO] =================================================
[INFO] [Config]: Loading default config.
[INFO] [Config]: loading config from: (null).
[INFO] Looking for config in: "/storage/.config/retroarch/retroarch.cfg".
[INFO] Environ SET_PIXEL_FORMAT: RGB565.
[INFO] Version of libretro API: 1
[INFO] Compiled against API: 1
[INFO] [Audio]: Set audio input rate to: 29970.03 Hz.
[INFO] Found shader "/tmp/shaders/bilinear.glslp"
[INFO] Found shader "/tmp/shaders/nearest.glslp"
[INFO] Found shader "/tmp/shaders/slang-conversion-template.glsl"
[INFO] Found shader "/tmp/shaders/stock.glsl"
[INFO] Found shader "/tmp/shaders/stock.slang"
[INFO] [Video]: Video @ fullscreen
[INFO] [GLX]: GLX_OML_sync_control and GLX_MESA_swap_control supported, using be                                             tter swap control method...
[INFO] [GL]: Found GL context: x
[INFO] [GL]: Detecting screen resolution 1920x1080.
[INFO] [XINERAMA]: Xinerama version: 1.1.
[INFO] [XINERAMA]: Xinerama screens: 1.
[INFO] [GLX]: Using Xinerama on screen #0.
[INFO] [GLX]: X = 0, Y = 0, W = 1920, H = 1080.
[INFO] [GLX]: Using true fullscreen.
[INFO] [GLX]: Found swap function: glXSwapIntervalMESA.
[INFO] [GLX]: glXSwapInterval(1)
[INFO] [GL]: Vendor: Intel Open Source Technology Center, Renderer: Mesa DRI Int                                             el(R) 945GM .
[INFO] [GL]: Version: 1.4 Mesa 18.0.0-rc3.
[INFO] [GL]: Using resolution 1920x1080
[INFO] [GL]: Default shader backend found: glsl.
[INFO] [Shader driver]: Using GLSL shader backend.
[INFO] [GLSL]: Checking GLSL shader support ...
[WARN] [GL]: Stock GLSL shaders will be used.
[INFO] [GLSL]: Found GLSL vertex shader.
[INFO] [GLSL]: Found GLSL fragment shader.
[INFO] [GLSL]: Linking GLSL program.
[INFO] [GLSL]: Found GLSL vertex shader.
[INFO] [GLSL]: Found GLSL fragment shader.
[INFO] [GLSL]: Linking GLSL program.
[INFO] [GLSL]: Found GLSL vertex shader.
[INFO] [GLSL]: Found GLSL fragment shader.
[INFO] [GLSL]: Linking GLSL program.
[INFO] [GLSL]: Found GLSL vertex shader.
[INFO] [GLSL]: Found GLSL fragment shader.
[INFO] [GLSL]: Linking GLSL program.
[INFO] [GLSL]: Found GLSL vertex shader.
[INFO] [GLSL]: Found GLSL fragment shader.
[INFO] [GLSL]: Linking GLSL program.
[INFO] [GLSL]: Found GLSL vertex shader.
[INFO] [GLSL]: Found GLSL fragment shader.
[INFO] [GLSL]: Linking GLSL program.
[INFO] [GLSL]: Found GLSL vertex shader.
[INFO] [GLSL]: Found GLSL fragment shader.
[INFO] [GLSL]: Linking GLSL program.
[INFO] [GLSL]: Found GLSL vertex shader.
[INFO] [GLSL]: Found GLSL fragment shader.
[INFO] [GLSL]: Linking GLSL program.
[INFO] Linker log: warning: Couldn't flatten if-statement.  This will likely res                                             ult in software rasterization.

[INFO] [GLSL]: Found GLSL vertex shader.
[INFO] [GLSL]: Found GLSL fragment shader.
[INFO] Shader log: 0:3(311): warning: `atime' used uninitialized

[INFO] [GLSL]: Linking GLSL program.
[INFO] Linker log: warning: Couldn't flatten if-statement.  This will likely res                                             ult in software rasterization.

[INFO] [GL]: Using 4 textures.
[INFO] [GL]: Loaded 1 program(s).
[INFO] [GL]: Using GL_RGB565 for texture uploads.
[INFO] [udev]: Keyboard #0 (/dev/input/event2).
[INFO] [udev]: Keyboard #1 (/dev/input/mouse0).
[ERROR] [udev] Failed to open device: /dev/input/event2 (Success).
[INFO] [udev]: Mouse #0 (/dev/input/mouse0).
[INFO] [udev]: Plugged pad: Microntek              USB Joystick           (121:6                                             ) on port #0.
[INFO] [Autoconf]: 187 profiles found.
[INFO] [udev]: Pad #0 (/dev/input/event3) supports force feedback.
[INFO] [udev]: Pad #0 (/dev/input/event3) supports 16 force feedback effects.
[INFO] [Joypad]: Found joypad driver: "udev".
[INFO] [Font]: Using font rendering backend: bitmap.
[INFO] [X11]: Suspending screensaver (X11, xdg-screensaver).
sh: xdg-screensaver: not found
[WARN] Could not suspend screen saver.
[INFO] [Video]: Found display server: x11
[INFO] [autoconf]: selected configuration: /tmp/autoconfig/udev/Microntek                                                           USB Joystick          .cfg
[INFO] ALSA: Using signed 16-bit format.
[INFO] ALSA: Period size: 1024 frames
[INFO] ALSA: Buffer size: 2048 frames
[INFO] [Menu]: Found menu display driver: "menu_display_gl".
[INFO] [Font]: Using font rendering backend: freetype.
[INFO] [Font]: Using font rendering backend: freetype.
[INFO] [LED]: LED driver = 'null' 0x8e5500
[INFO] SRAM will not be saved.
[INFO] Loading history file: [/storage/.config/retroarch/content_history.lpl].
[INFO] Loading history file: [/storage/.config/retroarch/content_favorites.lpl].
[INFO] Loading history file: [/storage/.config/retroarch/content_music_history.l                                             pl].
[INFO] Loading history file: [/storage/.config/retroarch/content_video_history.l                                             pl].
[INFO] Loading history file: [/storage/.config/retroarch/content_image_history.l                                             pl].
[INFO] [GL]: VSync => on
[INFO] [GLX]: glXSwapInterval(1)
[INFO] [GL]: VSync => on
[INFO] [GLX]: glXSwapInterval(1)
[INFO] [Config]: Saved new config to "/storage/.config/retroarch/retroarch.cfg".
[INFO] [XINERAMA]: Xinerama version: 1.1.
[INFO] [XINERAMA]: Xinerama screens: 1.
[INFO] [XINERAMA]: Saved monitor #0.
[INFO] [Video]: Does not have enough samples for monitor refresh rate estimation. Requires to run for at least 4096 frames.
[INFO] [Video]: Does not have enough samples for monitor refresh rate estimation. Requires to run for at least 4096 frames.