Extreme FPS lag in Minecraft 1.12.2 (Profile in post)

Ask Fedora
1

I’m getting extreme FPS lag in a Minecraft 1.12.2 modpack I made, and a Spark Unforged profile shows this is occuring in LibC Pthread. Any tips on how to fix this? Or is this a bug?

On Fedora 40.

2

It would help to know what hardware and software you are using.
What does `inxi -Fzxx’ report?

You may need to install inxi sudo dnf install inxi.
Please use preformatted text for the output, the </> button.

3 
System:
  Kernel: 6.10.4-200.fc40.x86_64 arch: x86_64 bits: 64 compiler: gcc
    v: 2.41-37.fc40
  Desktop: GNOME v: 46.4 tk: GTK v: 3.24.43 wm: gnome-shell dm: GDM
    Distro: Fedora Linux 40 (Workstation Edition)
Machine:
  Type: Desktop Mobo: Asus model: PRIME B360M-A v: Rev X.0x
    serial: <superuser required> part-nu: ASUS_MB_CNL UEFI: American Megatrends
    v: 0805 date: 08/03/2018
CPU:
  Info: 6-core model: Intel Core i5-9400F bits: 64 type: MCP arch: Coffee Lake
    rev: A cache: L1: 384 KiB L2: 1.5 MiB L3: 9 MiB
  Speed (MHz): avg: 800 min/max: 800/4100 cores: 1: 800 2: 800 3: 800 4: 800
    5: 800 6: 800 bogomips: 34798
  Flags: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx
Graphics:
  Device-1: NVIDIA TU116 [GeForce GTX 1660] vendor: Micro-Star MSI
    driver: nvidia v: 555.58.02 arch: Turing pcie: speed: 2.5 GT/s lanes: 16
    ports: active: none off: HDMI-A-1 empty: DP-1,DP-2,DP-3 bus-ID: 01:00.0
    chip-ID: 10de:2184
  Display: wayland server: X.org v: 1.20.14 with: Xwayland v: 24.1.2
    compositor: gnome-shell driver: gpu: nvidia,nvidia-nvswitch display-ID: 0
  Monitor-1: HDMI-A-1 model: LG (GoldStar) FULL HD res: 1920x1080 dpi: 102
    diag: 551mm (21.7")
  API: OpenGL v: 4.6.0 vendor: nvidia v: 555.58.02 glx-v: 1.4
    direct-render: yes renderer: NVIDIA GeForce GTX 1660/PCIe/SSE2
    display-ID: :0.0
  API: EGL Message: EGL data requires eglinfo. Check --recommends.
Audio:
  Device-1: Intel Cannon Lake PCH cAVS vendor: ASUSTeK driver: snd_hda_intel
    v: kernel bus-ID: 00:1f.3 chip-ID: 8086:a348
  Device-2: NVIDIA TU116 High Definition Audio vendor: Micro-Star MSI
    driver: snd_hda_intel v: kernel pcie: speed: 8 GT/s lanes: 16
    bus-ID: 01:00.1 chip-ID: 10de:1aeb
  Device-3: Logitech H390 headset with microphone
    driver: hid-generic,snd-usb-audio,usbhid type: USB rev: 1.1 speed: 12 Mb/s
    lanes: 1 bus-ID: 1-6:2 chip-ID: 046d:0a8f
  API: ALSA v: k6.10.4-200.fc40.x86_64 status: kernel-api
  Server-1: JACK v: 1.9.22 status: off
  Server-2: PipeWire v: 1.0.7 status: active with: 1: pipewire-pulse
    status: active 2: wireplumber status: active 3: pipewire-alsa type: plugin
Network:
  Device-1: Intel Dual Band Wireless-AC 3168NGW [Stone Peak] driver: iwlwifi
    v: kernel pcie: speed: 2.5 GT/s lanes: 1 bus-ID: 04:00.0 chip-ID: 8086:24fb
  IF: wlp4s0 state: up mac: <filter>
  Device-2: Realtek RTL8111/8168/8211/8411 PCI Express Gigabit Ethernet
    vendor: ASUSTeK RTL8111H driver: r8169 v: kernel pcie: speed: 2.5 GT/s
    lanes: 1 port: 3000 bus-ID: 05:00.0 chip-ID: 10ec:8168
  IF: enp5s0 state: down mac: <filter>
Bluetooth:
  Device-1: Intel Wireless-AC 3168 Bluetooth driver: btusb v: 0.8 type: USB
    rev: 2.0 speed: 12 Mb/s lanes: 1 bus-ID: 1-11:5 chip-ID: 8087:0aa7
  Report: btmgmt ID: hci0 rfk-id: 0 state: up address: <filter> bt-v: 4.2
    lmp-v: 8
Drives:
  Local Storage: total: 4.99 TiB used: 98.01 GiB (1.9%)
  ID-1: /dev/sda vendor: Western Digital model: WDS480G2G0A-00JH30
    size: 447.13 GiB speed: 6.0 Gb/s serial: <filter>
  ID-2: /dev/sdb vendor: Western Digital model: WD10EZEX-08WN4A0
    size: 931.51 GiB speed: 6.0 Gb/s serial: <filter>
  ID-3: /dev/sdc vendor: Seagate model: BUP BK size: 3.64 TiB type: USB
    rev: 3.0 spd: 5 Gb/s lanes: 1 serial: <filter>
Partition:
  ID-1: / size: 1.34 TiB used: 53.74 GiB (3.9%) fs: btrfs dev: /dev/sda3
  ID-2: /boot size: 973.4 MiB used: 451.2 MiB (46.4%) fs: ext4
    dev: /dev/sda2
  ID-3: /boot/efi size: 598.8 MiB used: 19 MiB (3.2%) fs: vfat
    dev: /dev/sda1
  ID-4: /home size: 1.34 TiB used: 53.74 GiB (3.9%) fs: btrfs dev: /dev/sda3
Swap:
  ID-1: swap-1 type: zram size: 8 GiB used: 0 KiB (0.0%) priority: 100
    dev: /dev/zram0
Sensors:
  System Temperatures: cpu: 34.0 C mobo: N/A
  Fan Speeds (rpm): N/A
Info:
  Memory: total: 32 GiB available: 31.25 GiB used: 3.15 GiB (10.1%)
  Processes: 317 Power: uptime: 34m wakeups: 0 Init: systemd v: 255
    target: graphical (5) default: graphical
  Packages: pm: flatpak pkgs: 26 Compilers: clang: 18.1.6 gcc: 14.2.1
    Shell: Bash v: 5.2.26 running-in: gnome-terminal inxi: 3.3.34

I have installed the NVidia drivers from RPMFusion since my original post, and now get an error stating that GLX configs can’t be created on all MC versions.

4

Can you post the full error message and command you ran?

5

The Minecraft error? The GLX config error comes up in the game log when launching the game.

6

To state the obvious I cannot see your screen.

You have to show us what you see. If it not possible as text then a screen shot of the error.
Without that information people have to guess what might be going on and that is hard.

7

I just found an issue report on Prism Launcher’s Github that has a possible solution for this. Will test that and report back.

EDIT: Both issues are now fixed.