So, today I was playing Minecraft like normal, and I was trying to search for ways to increase fps to have a smooth gameplay, since I have a lot of mods with Forge. I have Optifine too. When I found the "Edit Profile ---> JVM Arguments" way, I thought it was really effective since I had used that method before. The box consisted of '-Xmx16G' before because I had the "Sildur's Shaders" installed. Before I changed it to '-Xmx4G' then '-Xmx6G'. When I launched Minecraft, I went into one of my worlds (which was a downloaded map) and moved a bit. Just after 2 seconds of movement, the screen started to spin anti-clockwise so rapidly that there was a blend of the screen. When I let go of the 'W' key to move forward, I returned back to my normal screen. I could move while flying, but when I pressed SHIFT the same thing. I had no idea what was going on. Whenever I moved in any direction this would happen. I did F5 to take a glimpse of my player, and its hands were spinning RAPIDLY. I looked at other mobs and the same thing for them. I could use my mouse properly, but only the WASD keys were not functioning which was causing this spinning. I even went to a Multiplayer server and other players' hands were spinning too. Whenever something or someone moved, their legs would do the same. I reinstalled Minecraft, tried disabling my shaders, tried changing back the JVM Arguments back to original and I tried restarting the launcher multiple times.
And another problem which got created was that when I try to launch Minecraft on another profile with the original JVM Arguments or when I tried to change the JVM Arguments of my profile back to normal and launched Minecraft, the screen gets stuck on the Mojang splash text.
So, today I was playing Minecraft like normal, and I was trying to search for ways to increase fps to have a smooth gameplay, since I have a lot of mods with Forge. I have Optifine too. When I found the "Edit Profile ---> JVM Arguments" way, I thought it was really effective since I had used that method before. The box consisted of '-Xmx16G' before because I had the "Sildur's Shaders" installed. Before I changed it to '-Xmx4G' then '-Xmx6G'. When I launched Minecraft, I went into one of my worlds (which was a downloaded map) and moved a bit. Just after 2 seconds of movement, the screen started to spin anti-clockwise so rapidly that there was a blend of the screen. When I let go of the 'W' key to move forward, I returned back to my normal screen. I could move while flying, but when I pressed SHIFT the same thing. I had no idea what was going on. Whenever I moved in any direction this would happen. I did F5 to take a glimpse of my player, and its hands were spinning RAPIDLY. I looked at other mobs and the same thing for them. I could use my mouse properly, but only the WASD keys were not functioning which was causing this spinning. I even went to a Multiplayer server and other players' hands were spinning too. Whenever something or someone moved, their legs would do the same. I reinstalled Minecraft, tried disabling my shaders, tried changing back the JVM Arguments back to original and I tried restarting the launcher multiple times.
Here's a video I uploaded to show how it looks:
If you know how to fix this, please do tell me.
I do have the X-Ray mod, but it didn't seem to do anything. It only messed up after I changed the JVM Arguments, which I have done before many times.
And another problem which got created was that when I try to launch Minecraft on another profile with the original JVM Arguments or when I tried to change the JVM Arguments of my profile back to normal and launched Minecraft, the screen gets stuck on the Mojang splash text.
Whenever the screen got stuck I would force quit Minecraft, so I'm not sure whether there were any crash reports.
I checked the latest log of Minecraft, most of them consisted of mod startups.
21:20:33] [Client thread/INFO]: Setting user: Ecstatify
[21:20:36] [Client thread/INFO]: LWJGL Version: 2.9.2
[21:20:39] [Client thread/INFO]: Reloading ResourceManager: Default, FMLFileResourcePack:Forge Mod Loader, FMLFileResourcePack:Minecraft Forge, FMLFileResourcePack:Advanced Capes, FMLFileResourcePack:Animal Bikes, FMLFileResourcePack:Better PVP Mod, FMLFileResourcePack:MrCrayfish's Furniture Mod, FMLFileResourcePack:CustomNPCs, FMLFileResourcePack:Yarr Cute Mob Models - Remake, FMLFileResourcePack:Inventory Tweaks, FMLFileResourcePack:Just Enough Items, FMLFileResourcePack:Oceancraft, FMLFileResourcePack:Wings, Horns, and Hooves, the Ultimate Unicorn Mod!, FMLFileResourcePack:WorldEdit, japanesedowntown309618734.zip, PokeBox(R7).zip, Brobi V2 Pack(2).zip
[21:20:42] [Sound Library Loader/INFO]: Starting up SoundSystem...
[21:20:42] [Thread-11/INFO]: Initializing LWJGL OpenAL
[21:20:42] [Thread-11/INFO]: (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
[21:20:42] [Thread-11/INFO]: OpenAL initialized.
[21:20:42] [Sound Library Loader/INFO]: Sound engine started
[21:20:44] [Client thread/INFO]: Created: 16x16 textures-atlas
[21:20:47] [Client thread/INFO]: Reloading ResourceManager: Default, FMLFileResourcePack:Forge Mod Loader, FMLFileResourcePack:Minecraft Forge, FMLFileResourcePack:Advanced Capes, FMLFileResourcePack:Animal Bikes, FMLFileResourcePack:Better PVP Mod, FMLFileResourcePack:MrCrayfish's Furniture Mod, FMLFileResourcePack:CustomNPCs, FMLFileResourcePack:Yarr Cute Mob Models - Remake, FMLFileResourcePack:Inventory Tweaks, FMLFileResourcePack:Just Enough Items, FMLFileResourcePack:Oceancraft, FMLFileResourcePack:Wings, Horns, and Hooves, the Ultimate Unicorn Mod!, FMLFileResourcePack:WorldEdit, japanesedowntown309618734.zip, PokeBox(R7).zip, Brobi V2 Pack(2).zip
[21:20:47] [Client thread/INFO]: SoundSystem shutting down...
[21:20:47] [Client thread/WARN]: Author: Paul Lamb, www.paulscode.com
[21:20:47] [Sound Library Loader/INFO]: Starting up SoundSystem...
[21:20:47] [Thread-15/INFO]: Initializing LWJGL OpenAL
[21:20:47] [Thread-15/INFO]: (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
[21:20:47] [Thread-15/INFO]: OpenAL initialized.
[21:20:48] [Sound Library Loader/INFO]: Sound engine started
[21:20:49] [Client thread/ERROR]: Using missing texture, unable to load cfm:textures/items/itemmoney.png, java.io.FileNotFoundException
[21:20:50] [Client thread/ERROR]: Using missing texture, unable to load minecraft:textures/blocks/wool_colored_light_gray.png, java.io.FileNotFoundException
[21:20:54] [Client thread/INFO]: Created: 4096x4096 textures-atlas
[21:21:16] [Server thread/INFO]: Starting integrated minecraft server version 1.8.9
[21:21:16] [Server thread/INFO]: Generating keypair
[21:21:30] [Server thread/INFO]: Preparing start region for level 0
[21:21:33] [Server thread/WARN]: Skipping Piece with id TownPart
[21:21:33] [Server thread/WARN]: Skipping Piece with id TownPart
[21:21:33] [Server thread/WARN]: Skipping Piece with id TownPart
[21:21:33] [Server thread/WARN]: Skipping Piece with id TownPart
[21:21:33] [Server thread/WARN]: Skipping Piece with id TownPart
[21:21:33] [Server thread/WARN]: Skipping Piece with id TownPart
[21:21:33] [Server thread/WARN]: Skipping Piece with id TownPart
[21:21:33] [Server thread/WARN]: Skipping Piece with id TownPart
[21:21:33] [Server thread/WARN]: Skipping Piece with id TownPart
[21:21:33] [Server thread/WARN]: Skipping Piece with id TownPart
[21:21:33] [Server thread/WARN]: Skipping Piece with id TownPart
[21:21:33] [Server thread/WARN]: Skipping Piece with id TownPart
[21:21:33] [Server thread/WARN]: Skipping Piece with id TownPart
[21:21:33] [Server thread/WARN]: Skipping Piece with id TownPart
[21:21:33] [Server thread/INFO]: Preparing spawn area: 0%
[21:21:34] [Server thread/INFO]: Preparing spawn area: 65%
[21:21:36] [Server thread/INFO]: Changing view distance to 13, from 10
[21:21:45] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 2974ms behind, skipping 59 tick(s)
[21:21:45] [Server thread/INFO]: Ecstatify[local:E:93eb2bd1] logged in with entity id 10 at (-242.69999998807907, 148.0, 169.727534710919)
[21:21:45] [Server thread/INFO]: Ecstatify joined the game
[21:21:53] [Thread-13/INFO]: [CHAT] §2AnimalBikes§f installed. For more info §9§nClick here
[21:21:53] [Thread-9/INFO]: [CHAT] §2CustomNpcs§f installed. For more info §9§nClick here
[21:22:06] [Client thread/INFO]: [CHAT] InvTweaks: Configuration loaded.
I seemed to fix it by moving the %appdata% .minecraft folder to my desktop. Thank you anyway