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Asus Zenbook UX5406AA Display Backlight Fix (#5620)

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* Extract ASUS Expertbook B9406 display backlight fix and apply it for Zenbook ux5406aa too

* Add migration for Panther Lake Asus display bakclight fix

* Check if limine-update exists before executing it in the migration

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
This commit is contained in:
Mateusz Kowalczyk
2026-05-07 12:10:45 +02:00
committed by GitHub
co-authored by Copilot Autofix powered by AI
parent 81aaade827
commit bc62c23351
5 changed files with 39 additions and 8 deletions
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install/config/all.sh
+1
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@@ -51,6 +51,7 @@ run_logged $OMARCHY_INSTALL/config/hardware/intel/sof-firmware.sh
run_logged $OMARCHY_INSTALL/config/hardware/dell/fix-xps-haptic-touchpad.sh
run_logged $OMARCHY_INSTALL/config/hardware/asus/fix-asus-ptl-display-backlight.sh
run_logged $OMARCHY_INSTALL/config/hardware/asus/fix-asus-ptl-b9406-display.sh
run_logged $OMARCHY_INSTALL/config/hardware/asus/fix-asus-ptl-b9406-touchpad.sh
run_logged $OMARCHY_INSTALL/config/hardware/asus/fix-audio-mixer.sh
install/config/hardware/asus/fix-asus-ptl-b9406-display.sh
+2 -8
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@@ -1,21 +1,15 @@
# Display fixes for ASUS ExpertBook B9406 (Panther Lake / Xe3 iGPU).
# Display fix for ASUS ExpertBook B9406 (Panther Lake / Xe3 iGPU).
#
# Panel Replay is Xe3-new, default-on in the xe driver, and has a broken
# exit/wake path on this eDP panel: the panel latches the last-presented
# frame in self-refresh and never wakes for subsequent atomic commits, so
# the screen only updates on a full modeset (e.g. a VT switch). The older
# xe.enable_psr=0 knob does not cover Panel Replay.
#
# The panel's EDID on eDP-1 reads as empty, so xe takes backlight type from
# VBT (which says PWM) but the panel actually wants DPCD AUX backlight.
# Without xe.enable_dpcd_backlight=1, intel_backlight sysfs writes succeed
# but produce no visible change; brightness is effectively binary.
if omarchy-hw-asus-expertbook-b9406; then
sudo mkdir -p /etc/limine-entry-tool.d
cat <<EOF | sudo tee /etc/limine-entry-tool.d/asus-expertbook-b9406-display.conf >/dev/null
# ASUS ExpertBook B9406 (Panther Lake / Xe3) display workarounds
# ASUS ExpertBook B9406 (Panther Lake / Xe3) display workaround
KERNEL_CMDLINE[default]+=" xe.enable_panel_replay=0"
KERNEL_CMDLINE[default]+=" xe.enable_dpcd_backlight=1"
EOF
fi
install/config/hardware/asus/fix-asus-ptl-display-backlight.sh
+16
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@@ -0,0 +1,16 @@
# Display backlight fix for ASUS Panther Lake / Xe3 iGPU laptops.
# Enabled only for ExpertBook B9406 and Zenbook UX5406AA for now.
# Other models need confirmation whether the issue exists there too.
#
# The panel's EDID on eDP-1 reads as empty, so xe takes backlight type from
# VBT (which says PWM) but the panel actually wants DPCD AUX backlight.
# Without xe.enable_dpcd_backlight=1, intel_backlight sysfs writes succeed
# but produce no visible change; brightness is effectively binary.
if omarchy-hw-asus-expertbook-b9406 || omarchy-hw-asus-zenbook-ux5406aa; then
sudo mkdir -p /etc/limine-entry-tool.d
cat <<EOF | sudo tee /etc/limine-entry-tool.d/asus-ptl-display-backlight.conf >/dev/null
# ASUS Panther Lake display backlight fix
KERNEL_CMDLINE[default]+=" xe.enable_dpcd_backlight=1"
EOF
fi