Affects Version/s: Minecraft 19w06a, Minecraft 19w07a, Minecraft 19w08b, Minecraft 19w09a, Minecraft 19w11b, Minecraft 19w12a, Minecraft 19w12b, Minecraft 19w13b, Minecraft 19w14a, Minecraft 19w14b, Minecraft 1.14 Pre-Release 2, Minecraft 1.14, Minecraft 1.14.1 Pre-Release 1, Minecraft 1.14.1, Minecraft 1.14.2 Pre-Release 2, Minecraft 1.14.2 Pre-Release 3, Minecraft 1.14.2 Pre-Release 4, Minecraft 1.14.2, Minecraft 1.14.4 Pre-Release 5, Minecraft 1.14.4 Pre-Release 6, 1.14.4, 19w34a, 1.15 Pre-release 4, 1.15.2, 20w06a
Environment:PC on which this problem occurs:
* OS: Linux Manjaro 64bit KDE
** Kernel version: 4.19.16-1 MANJARO
** KDE Plasma Version: 5.14.5
** Window manager: KWin
* Java version: 1.8.0_192 64bit
* CPU: i5 2500k @ 3.7GHz
* RAM: 16GB 1333MHz DDR3
* GPU: GTX 550 Ti
* SSD: SATA Samsung 750
PC on which this problem DOESN'T occur:
* OS: Windows 10 Home 64bit
* Java version: ??
* CPU: i5-6600K
* RAM: 16GB 1600MHz DDR4
* GPU: GTX 970
* SSD: Intel M.2PC on which this problem occurs: * OS: Linux Manjaro 64bit KDE * ** Kernel version: 4.19.16-1 MANJARO ** KDE Plasma Version: 5.14.5 ** Window manager: KWin * Java version: 1.8.0_192 64bit * CPU: i5 2500k @ 3.7GHz * RAM: 16GB 1333MHz DDR3 * GPU: GTX 550 Ti * SSD: SATA Samsung 750 PC on which this problem DOESN'T occur: * OS: Windows 10 Home 64bit * Java version: ?? * CPU: i5-6600K * RAM: 16GB 1600MHz DDR4 * GPU: GTX 970 * SSD: Intel M.2
While in windowed mode, moving the mouse causes the in-game camera to rotate in a glitchy manner, in a seemingly random direction, which makes the game very hard to play. The faster the mouse is moved, the more pronounced the issue becomes.
Example video of the problem: https://www.youtube.com/watch?v=fK0o0rVldZ8
In the video I am moving my mouse side to side, and returning it to the middle (parallel to the ground) when the problem happens.
A I found is that . But playing using touchscreen mode is not easy with the mouse either, so a proper fix is very much needed.
This problem started happening in 19w06a, so for me.
, tried with a generic Gembird mouse, generic Logitech mouse and Razer Taipan.
The world chosen doesn't affect the problem, it happens on new, old, regular and superflat worlds.
It happens in singleplayer, when connected to a local server hosted on the same PC and a server hosted ~50 ms away from the client.
When my friend connects to said server, she doesn't have this problem. She also doesn't experience it in singleplayer. The major difference our systems have is the OS we use.
This leads me to believe that the problem (version specified in the Environment section). Because this problem doesn't happen in previous MC versions on the same machine, I think that some change in 19w06a somehow affects the way Minecraft handles mouse input which doesn't play well with the way KDE handles mouse movement.
Tested . It happens only in KDE Plasma.
Tested on KDE again, but this time in fullscreen instead of windowed mode,
A small update, I have a new computer now and it seems that on a fresh install of Linux with KDE/Kwin this issue doesn't happen.
It's possible that because , the change in drivers and X-server settings affected if this problem happens or not. LWJGL version changed in MultiMC when I reinstalled everything.