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Picom - Temporarily disable vsync
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yshui/picom#1265

After a somewhat recent update, picom with vsync enabled causes
slowdown/freezing, and I'm having other nvidia issues (e.g. various issues with
mpv failing to open).

Because I've disable vsync, screen tearing is very bad by default, so I'm
enabling force full composition pipeline now to prevent it.
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@noctuid
noctuid committed Jun 8, 2024
1 parent a9aa35e commit 7d83188
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Showing 5 changed files with 31 additions and 2 deletions.
3 changes: 2 additions & 1 deletion aesthetics/.config/picom.conf
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Expand Up @@ -28,7 +28,8 @@ glx-no-rebind-pixmap = true;
use-damage = true;

# * Tearing
vsync = true;
# https://github.com/yshui/picom/issues/1265
vsync = false;

# don't unredirect all windows when there is an opaque fullscreen window (true
# maximizes performance but disables compositing)
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13 changes: 13 additions & 0 deletions root/etc/X11/xorg.conf.d/my-xorg.conf
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Expand Up @@ -42,3 +42,16 @@ EndSection

# * GPU
# handled by optimus-manager; not recommended to mess with

# TODO for now am doing manually; see fixtear script
# https://wiki.archlinux.org/title/NVIDIA/Troubleshooting#Multi-monitor
# fix screen tearing
# only keep screen section
# Section "Screen"
# Identifier "Screen0"
# Device "Device0"
# Monitor "Monitor0"
# Option "ForceFullCompositionPipeline" "on"
# Option "AllowIndirectGLXProtocol" "off"
# Option "TripleBuffer" "on"
# EndSection
11 changes: 11 additions & 0 deletions scripts/bin/fixtear
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@@ -0,0 +1,11 @@
#!/usr/bin/env bash
# https://wiki.archlinux.org/title/NVIDIA/Troubleshooting#Avoid_screen_tearing
# fixes screen tearing (tested and this works if applied correctly)

# had to run this with monitor connected then disconnect monitor then reconnect
# just sticking with that because it's easy, otherwise would need to specify
# both displays:
# https://wiki.archlinux.org/title/NVIDIA/Troubleshooting#Multi-monitor
nvidia-settings --assign CurrentMetaMode="nvidia-auto-select +0+0 { ForceFullCompositionPipeline = On }"

# can validate with: nvidia-settings --query CurrentMetaMode
4 changes: 3 additions & 1 deletion scripts/bin/gpu-switch
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@@ -1,5 +1,7 @@
#!/usr/bin/env bash
# probably won't use this much (will just stay in hybrid mode)
# pretty much only use nvidia mode; too many issues hybrid mode; would use
# integrated only for battery saving
# arg: (integrated|hybrid|nvidia)

echo "Run 'sudo prime-switch' after X stops."
echo "Press anything to continue"
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2 changes: 2 additions & 0 deletions scripts/bin/helpers/xenv.sh
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Expand Up @@ -11,6 +11,7 @@ export QT_AUTO_SCREEN_SCALE_FACTOR=1

if monitor_is_hidpi; then
export MONITOR_IS_HIDPI=true
export POLYBAR_DPI=192

export QT_ENABLE_HIGHDPI_SCALING=1

Expand All @@ -24,6 +25,7 @@ if monitor_is_hidpi; then
# export GDK_DPI_SCALE=0.5
else
export MONITOR_IS_HIDPI=false
export POLYBAR_DPI=96
fi

# * WM and Polybar
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2 comments on commit 7d83188

@yaaama
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@yaaama yaaama commented on 7d83188 Nov 16, 2024

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What nvidia drivers are you using? and which picom are you using?

I was facing the same problem but its fixed now (somehow).

Maybe copying my setup if applicable can help?

Drivers: nvidia-open-dkms

& I'm using the picom-git repo from the AUR.

Try this configuration:

backend = "glx";
detect-transient = true;
detect-client-leader = true;
use-damage = true;
shadow = true;

# vsync seems to work now | forced pipeline comp OFF
vsync = true;

# This stopped helping after upgrading to picom-git
# no-frame-pacing = true;

# Helps mask some issues
fading = true;
fade-delta = 3.0;
fade-in-step = 0.03;
fade-out-step = 0.03;

mark-wmwin-focused = false;
use-ewmh-active-win = true;
unredir-if-possible = true;
mark-ovredir-focused = true;
detect-rounded-corners = false;
use-damage = false;

@noctuid
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Yes, it was fixed: yshui/picom#1265

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