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libretro / parallel-n64

Optimized/rewritten Nintendo 64 emulator made specifically for Libretro. Originally based on Mupen64 Plus.
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Setting the Framerate setting to "fullspeed" causes the screen to flicker #495

Open ehw opened 6 years ago

ehw commented 6 years ago

Using the latest build of Parallel (as of writing) while using the OpenGL video driver in the latest nightly build of RetroArch, the screen will flicker if the Framerate setting is set to fullspeed. The screen doesn't flicker when set to "original". This seems to affect any game that can run in Parallel. My Parallel settings have always remained the same, and this problem hasn't happened until just recently. I am not using any shaders. I 'reinstalled' retroarch by making a new folder and redownloading the same nightly builds and I can reproduce the same issue by setting the framerate setting to fullspeed.

You should be able to reproduce this issue by doing the following: 1.) Download the latest nightly build of Retroarch and Parallel (as of writing) 2.) Open Retroarch and make sure the video driver is set to 'gl'. 3.) Load up any game using the Parallel core (you shouldn't get any screen flickering. 4.) Press F1 and select 'Option'. 5.) Set the Framerate option to "fullspeed". 6.) Close the ROM out and reopen it within Retroarch, the game should now flicker. Restarting the game as recommended by the setting doesn't seem to apply the setting correctly (another bug?), but closing the ROM out and reopening it seems to.

My settings in Parallel are configured as follows, but I've also tested with default settings and setting the Framerate setting to fullspeed before closing/reopening the ROM seems to always cause the problem: CPU Core - dynamic_recompiler Audio Buffer Size - 2048 Analog Deadzone - 15 Player 1 Pak - rumble Enable Expansion Pak RAM - ON GFX Accuracy (restart) - verhigh Send audio lists to HLE RSP - OFF GFX Plugin - auto RSP Plugin - auto Resolution (restart) 2240x1680 Aspect ratio hint - widescreen Texture Filtering - automatic (Glide64) Polygon Offset Factor - -3.0 (Glide64) Polygon Offset Units - -3.0 (Angrylion) VI Overlay - OFF VI Refresh (Overclock - 2200 Buffer Swap - OFF Framerate (restart) - fullspeed

My computer: OS - Windows 10 x64 Graphics - NVIDIA GeForce 680 GTX (388.71) CPU - Intel 2500k Motherboard - Asrock z68 gen3

EDIT: I've also tested this on macos and the same thing occurs as well.

ehw commented 6 years ago

Small update but changing the GFX plugin to angrylion fixes the flickering. The flickering occurs in the rice and glide64 plugins. I don't know about gln64, since that is currently producing a black screen for me at the moment.