007d6fcd7d
* Match display backlight candidates against real globs [[ ]] does not do pathname expansion, so amdgpu_bl* and acpi_video* only ever tested for files with a literal asterisk in the name. Every machine without intel_backlight silently fell through to the alphabetical first entry, which picks acpi_video0 over amdgpu_bl0. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> * Use the gmux backlight instead of the Touch Bar on T2 Macs /sys/class/backlight on a T2 Mac holds appletb_backlight and gmux_backlight. Neither was a candidate, so the alphabetical fallback picked the Touch Bar and brightness keys dimmed it instead of the display. Add gmux_backlight and never fall back to the Touch Bar, which is not a display panel on any Mac. gmux ranks above the GPU backlights because apple-gmux only registers its device when the kernel has already selected it for the machine, and on dual-GPU Macs the GPU's own PWM stops driving the panel as soon as that GPU suspends. Fixes #6558 Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
26 lines
1005 B
Bash
Executable File
26 lines
1005 B
Bash
Executable File
#!/bin/bash
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# omarchy:summary=Print the most likely display backlight device.
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# omarchy:examples=omarchy-hw-display
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backlight_path="${OMARCHY_BACKLIGHT_PATH:-/sys/class/backlight}"
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# Start with the first possible output, then refine to the most likely given an order heuristic.
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# Glob the candidates in the loop list: [[ ]] does not do pathname expansion.
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# The Touch Bar on T2 Macs registers a backlight that never drives the display panel.
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device="$(ls -1 "$backlight_path" 2>/dev/null | grep -vx appletb_backlight | head -n1)"
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# gmux comes first: apple-gmux only registers when the kernel has already picked it, and on
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# dual-GPU Macs the GPU's own PWM stops driving the panel once that GPU suspends.
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for candidate in "$backlight_path"/gmux_backlight "$backlight_path"/amdgpu_bl* "$backlight_path"/intel_backlight "$backlight_path"/acpi_video*; do
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if [[ -e $candidate ]]; then
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device="${candidate##*/}"
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break
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fi
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done
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if [[ -n $device ]]; then
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printf '%s\n' "$device"
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else
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exit 1
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fi
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