The following sections detail what tweaks can be viable for certain hardware: Raspberry Pi 3 Therefore they should be applied at a system level, or even a game-specific level rather than globally. Whilst unsupported, careful application of some of these tweaks can be useful for certain games and systems where additional headroom is available. If you should choose to make use of them, always keep in mind that you have done so if performance issues arise and be prepare to try removing them as a potential cause. All these settings are unsupported by Retropie. However, all those noted below will have additional performance penalties, or no effect whatsoever. The internet is full of input lag configuration changes for RetroPie. Some users report having less input lag using a bluetooth dongle rather than the Raspberry Pi 3's on-board Bluetooth. Wireless controllers can add further delay. Users have discovered that if the TV's HDMI input for the Pi is already selected/activated when the TV is powered on (as opposed to a Blu-ray player, game console, etc.), this input lag can be avoided. HDMI sourceĬertain models of older Vizio TVs (and possibly others) may exhibit input lag after switching over to the Raspberry Pi from a different HDMI source. The latter will feel noticeably slower and less responsive. NTSC (eg USA/Japanese) versions of games will run at 60Hz, but PAL (eg European) versions will run at 50Hz. CRTs do not process and display video signals in the same way. NOTE: The above only applies to modern digital TVs. Be sure you haven’t done this by checking both of these options are set to blank for your emulators and games, which is the default. Such operations are often VERY slow.īy default RetroPie will output to your TV's native resolution, but this can be overridden via Runcommand - options 4 and 5 - "Video Mode". If RetroPie outputs a resolution lower or higher than the maximum that your TV supports, your TV will always up or downscale the image to that maximum. NOTE: Some TVs are known to look worse via 'GAME MODE' typically those that have atypical native panel resolusions like 1366x768, where it may force them to run at 1080p/720p, causing ugly scaling. Via /boot/config.txtĪdd the following line to /boot/config.txt to cause newer TVs to automatically attempt to request 'GAME MODE': Switch to the AV channel used for RetroPie, and search in the display or picture options for such an option. This mode is generally called 'GAME MODE', and can be activated in two ways: Via TV Input Lag, therefore, can be a real problem in a RetroPie environment, but fortunately there are a number of simple fixes: Set TV to 'GAME MODE'Īlmost every HDTV or monitor will have a way of setting any given AV channel to a special mode that cuts out all non-essential post-processing, ensuring the lowest possible response time. The games created for them assumed this level of response, and were fast and unforgiving. Digital controllers connected to dedicated games consoles, pumping raw analogue images straight to the screen. Typically, emulated games come from the CRT and wired controller era. Finally, running emulators on computer operating systems can add more delay in excess of the original hardware. Wireless controllers can also add additional delay. Typical HDTVs perform 'post-processing' on images before they are displayed, causing a delay. Input Lag describes the delay between pressing a button on the controller, and the corresponding action being performed on screen. Universal Controller Calibration & Mapping Using xboxdrvĬonvert RetroPie SD Card Image to NOOBS Image Validating, Rebuilding, and Filtering Arcade ROMs
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