Picom - Temporarily disable vsync

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.

aesthetics/.config/picom.conf

@@ -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)

root/etc/X11/xorg.conf.d/my-xorg.conf

@@ -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

scripts/bin/fixtear

@@ -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

scripts/bin/gpu-switch

@@ -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"

scripts/bin/helpers/xenv.sh

@@ -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
 
@@ -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