[SOLVED] Frame skipping on X11 and Nvidia

RandomBK · 2021-09-26 21:36:37

Hi all, I'm currently struggling with yet another classic Nvidia graphics problem: frameskipping and general lagginess.

On both Gnome X11 and Plasma X11, I'm getting a 30fps experience on my 60fps displays. All applications claim to be running at 60fps, but the experience is decidedly *not* 60fps.
Common frame skipping tests such as https://www.testufo.com/frameskipping indicate that I'm skipping every other frame.

NOTE: I'm running a dual-4K setup, but the same issue applies when only using one display. CPU usage is very low at all times.

archlinux-keyring 20210902-1
chrome-gnome-shell-git 10.1.r2.gf6d3cc32580c-1
gnome-alsamixer 0.9.7-4
gnome-autoar 0.4.0-1
gnome-backgrounds 40.1-1
gnome-bluetooth 3.34.5-2
gnome-calculator 40.1-1
gnome-color-manager 3.36.0-1
gnome-common 3.18.0-4
gnome-control-center 40.0-1
gnome-desktop 1:40.4-1
gnome-dictionary 40.0-1
gnome-disk-utility 40.2-1
gnome-font-viewer 40.0-1
gnome-keyring 1:40.0-1
gnome-menus 3.36.0-1
gnome-online-accounts 3.40.0-1
gnome-panel 3.40.0-1
gnome-screenshot 40.0-2
gnome-session 40.1.1-1
gnome-settings-daemon 40.0.1-2
gnome-shell 1:40.4-1
gnome-system-monitor 40.1-1
gnome-terminal 3.40.3-1
gnome-themes-extra 3.28-2
gnome-tweaks 40.0-1
gnome-user-docs 40.4-1
gnome-user-share 3.34.0-2
gnome-video-effects 0.5.0+4+g9554041-2
lib32-nvidia-utils 470.74-1
lib32-util-linux 2.37.2-1
libgnome-keyring 3.12.0+13+g4f8ab73-3
libgnomekbd 3.26.1+2+g8d02ebd-2
linux 5.14.7.arch1-1
linux-api-headers 5.12.3-1
linux-firmware 20210818.c46b8c3-1
linux-headers 5.14.7.arch1-1
linux-vfio 5.14.3.arch1-2
linux-vfio-docs 5.14.3.arch1-2
linux-vfio-headers 5.14.3.arch1-2
mutter 40.4-1
nvidia-dkms 470.74-1
nvidia-settings 470.74-1
nvidia-utils 470.74-1
polkit-gnome 0.105-8
syslinux 6.04.pre2.r11.gbf6db5b4-3
util-linux 2.37.2-1
util-linux-libs 2.37.2-1
xorg-fonts-encodings 1.0.5-2
xorg-iceauth 1.0.8-2
xorg-server 1.20.13-2
xorg-server-common 1.20.13-2
xorg-server-xvfb 1.20.13-2
xorg-setxkbmap 1.3.2-2
xorg-xauth 1.1-2
xorg-xdpyinfo 1.3.2-4
xorg-xhost 1.0.8-2
xorg-xinit 1.4.1-3
xorg-xkbcomp 1.4.5-1
xorg-xmodmap 1.0.10-2
xorg-xprop 1.2.5-1
xorg-xrandr 1.5.1-2
xorg-xrdb 1.2.1-1
xorg-xset 1.2.4-2
xorg-xsetroot 1.1.2-2
xorg-xwayland 21.1.2-1
xorgproto 2021.5-1

neofetch:

OS: Arch Linux x86_64 
Host: Z270M-D3H 
Kernel: 5.14.3-arch1-2-vfio 
Uptime: 26 mins 
Packages: 1551 (pacman) 
Shell: bash 5.1.8 
Resolution: 2160x3840, 3840x2160 
DE: GNOME 40.4 
WM: Mutter 
WM Theme: Adwaita 
Theme: Adwaita-dark [GTK2/3] 
Icons: Adwaita [GTK2/3] 
Terminal: guake 
CPU: Intel i7-7700K (8) @ 4.500GHz 
GPU: NVIDIA 01:00.0 NVIDIA Corporation Device 2489 
GPU: Intel HD Graphics 630 
Memory: 3065MiB / 32025MiB

x11:

# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings:  version 470.74

Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0" 0 0
    InputDevice    "Keyboard0" "CoreKeyboard"
    InputDevice    "Mouse0" "CorePointer"
    Option         "Xinerama" "0"
EndSection

Section "Files"
EndSection

Section "Module"
    Load           "dbe"
    Load           "extmod"
    Load           "type1"
    Load           "freetype"
    Load           "glx"
EndSection

Section "InputDevice"
    # generated from default
    Identifier     "Mouse0"
    Driver         "mouse"
    Option         "Protocol" "auto"
    Option         "Device" "/dev/psaux"
    Option         "Emulate3Buttons" "no"
    Option         "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"
    # generated from default
    Identifier     "Keyboard0"
    Driver         "kbd"
EndSection

Section "Monitor"
    # HorizSync source: edid, VertRefresh source: edid
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "LG Electronics LG Ultra HD"
    HorizSync       30.0 - 135.0
    VertRefresh     56.0 - 61.0
    Option         "DPMS"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "NVIDIA GeForce RTX 3060 Ti"
    Option "CoolBits" "24"
    Option "TrippleBuffer" "True"
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "Stereo" "0"
    Option         "nvidiaXineramaInfoOrder" "DFP-1"
    Option         "metamodes" "HDMI-0: nvidia-auto-select +0+0 {rotation=left, ForceCompositionPipeline=On, ForceFullCompositionPipeline=On}, DP-0: nvidia-auto-select +2160+975 {ForceCompositionPipeline=On, ForceFullCompositionPipeline=On}"
    Option         "SLI" "Off"
    Option         "MultiGPU" "Off"
    Option         "BaseMosaic" "off"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

kernel cmdline:

BOOT_IMAGE=/vmlinuz-linux-vfio root=UUID=XXXXX rw rootflags=subvol=rdlp2-root cryptdevice=PARTUUID=XXXXXX:system:allow-discards root=UUID=XXXXX intel_iommu=on iommu=pt pcie_acs_override=id:8086:a2f0 nvidia-drm.modeset=1 mitigations=off nvidia.NVreg_RegistryDwords=EnableBrightnessControl=1 raid0.default_layout=2

mkinitcpio:

MODULES="vfio vfio_iommu_type1 vfio_pci vfio_virqfd i915 nvidia nvidia_modeset nvidia_uvm nvidia_drm"

grep -iE 'vdpau | dri driver' /var/log/Xorg.0.log:

[  4896.982] (II) NVIDIA(0): [DRI2]   VDPAU driver: nvidia

vainfo:

vainfo: VA-API version: 1.12 (libva 2.12.0)
vainfo: Driver version: Splitted-Desktop Systems VDPAU backend for VA-API - 0.7.4
vainfo: Supported profile and entrypoints
      VAProfileMPEG2Simple            :	VAEntrypointVLD
      VAProfileMPEG2Main              :	VAEntrypointVLD
      VAProfileMPEG4Simple            :	VAEntrypointVLD
      VAProfileMPEG4AdvancedSimple    :	VAEntrypointVLD
      <unknown profile>               :	VAEntrypointVLD
      VAProfileH264Main               :	VAEntrypointVLD
      VAProfileH264High               :	VAEntrypointVLD
      VAProfileVC1Simple              :	VAEntrypointVLD
      VAProfileVC1Main                :	VAEntrypointVLD
      VAProfileVC1Advanced            :	VAEntrypointVLD
      VAProfileVP9Profile0            :	VAEntrypointVLD

Last edited by RandomBK (2021-09-27 00:10:18)

V1del · 2021-09-26 22:03:06

Please use [ code ] not [ quote ] for outputs

Forcing full composition pipeline while also running a normal standalone compositor is likely to introduce stuff like this. What's the behaviour with a vanilla config without the composition pipeline and/or triple buffering enabled?

RandomBK · 2021-09-26 22:30:49

That fixed the issue. Thanks!

I'm not sure why I had that enabled in the first place... I think I was following https://wiki.archlinux.org/title/NVIDIA … en_tearing to fix an issue that no longer applied.

V1del · 2021-09-26 23:39:53

Great, please mark as [SOLVED] by editing the title in your first post.

Arch Linux

#1 2021-09-26 21:36:37

[SOLVED] Frame skipping on X11 and Nvidia

#2 2021-09-26 22:03:06

Re: [SOLVED] Frame skipping on X11 and Nvidia

#3 2021-09-26 22:30:49

Re: [SOLVED] Frame skipping on X11 and Nvidia

#4 2021-09-26 23:39:53

Re: [SOLVED] Frame skipping on X11 and Nvidia

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