/sys/class/backlight suddenly empty after disable LVDS1 in arandr

I use sxhkd to change the brightness of my keyboard and display, I only used my hdimi display for a while, and now the backlight folder is empty, anyone now what caused this and how to fix it? I use Garuda on a 2012 Macbook Pro.

I will post garuda-inxi when I get the chance

My sxhkd config

/home/manuel/.config/sxhkd/sxhkdrc

XF86MonBrightnessUp
          sudo xbacklight -inc +5
XF86MonBrightnessDown
          sudo xbacklight -inc -5
XF86AudioRaiseVolume
          pactl set-sink-volume 0 +5%;pamixer --get-volume-human | dzen2 -p 1
XF86AudioLowerVolume
          pactl set-sink-volume 0 -5%;pamixer --get-volume-human | dzen2 -p 1
XF86AudioMute
          pactl set-sink-mute 0 toggle;pamixer --get-volume-human | dzen2 -p 1
XF86KbdBrightnessUp
          sudo xbacklight -ctrl smc::kbd_backlight -inc 5
XF86KbdBrightnessDown
          sudo xbacklight -ctrl smc::kbd_backlight -dec 5
XF86Eject
         eject
super XF86Eject
         flameshot launcher

???
Use live ISO, please.

Summary

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2 Likes

Garuda Inxi Output

System:
  Kernel: 6.1.4-zen2-1-zen arch: x86_64 bits: 64 compiler: gcc
    v: 12.2.0 parameters: BOOT_IMAGE=/@/boot/vmlinuz-linux-zen
    root=UUID=4099c804-740b-4c2b-be89-691b4c6c569a rw
    [email protected] rd.udev.log_priority=3
    vt.global_cursor_default=0
    resume=UUID=7a2bef2e-2051-49ea-b2c2-476cfbd79f28
    loglevel=3 sdhci.debug_quirks2=4 ibt=off
  Desktop: dwm v: 6.3 vt: 1 dm: LightDM v: 1.32.0
    Distro: Garuda Linux base: Arch Linux
Machine:
  Type: Laptop System: Apple product: MacBookPro9,2 v: 1.0
    serial: <superuser required> Chassis: type: 10
    v: Mac-6F01561E16C75D06 serial: <superuser required>
  Mobo: Apple model: Mac-6F01561E16C75D06 v: MacBookPro9,2
    serial: <superuser required> UEFI: Apple v: 425.0.0.0.0
    date: 10/26/2021
Battery:
  ID-1: BAT0 charge: 32.0 Wh (65.7%)
    condition: 48.7/62.9 Wh (77.4%) volts: 11.0 min: 10.9
    model: SMP bq20z451 type: Li-ion serial: N/A
    status: discharging cycles: 401
CPU:
  Info: model: Intel Core i5-3210M bits: 64 type: MT MCP
    arch: Ivy Bridge gen: core 3 level: v2 built: 2012-15
    process: Intel 22nm family: 6 model-id: 0x3A (58)
    stepping: 9 microcode: 0x21
  Topology: cpus: 1x cores: 2 tpc: 2 threads: 4 smt: enabled
    cache: L1: 128 KiB desc: d-2x32 KiB; i-2x32 KiB L2: 512 KiB
    desc: 2x256 KiB L3: 3 MiB desc: 1x3 MiB
  Speed (MHz): avg: 2954 high: 3021 min/max: 1200/3100
    scaling: driver: intel_cpufreq governor: performance cores:
    1: 2894 2: 3021 3: 2893 4: 3008 bogomips: 19953
  Flags: avx ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3
    vmx
  Vulnerabilities: <filter>
Graphics:
  Device-1: Intel 3rd Gen Core processor Graphics vendor: Apple
    driver: i915 v: kernel arch: Gen-7 process: Intel 22nm
    built: 2012-13 ports: active: LVDS-1 empty: DP-1, DP-2,
    DP-3, HDMI-A-1, HDMI-A-2, HDMI-A-3, VGA-1 bus-ID: 00:02.0
    chip-ID: 8086:0166 class-ID: 0300
  Device-2: Apple FaceTime HD Camera type: USB
    driver: uvcvideo bus-ID: 1-1.1:3 chip-ID: 05ac:8509
    class-ID: 0e02 serial: <filter>
  Display: server: X.Org v: 21.1.6 with: Xwayland v: 22.1.7
    driver: X: loaded: intel unloaded: modesetting,vesa
    alternate: fbdev dri: crocus gpu: i915 display-ID: :0
    screens: 1
  Screen-1: 0 s-res: 1280x800 s-dpi: 96
    s-size: 338x211mm (13.31x8.31") s-diag: 398mm (15.69")
  Monitor-1: LVDS-1 mapped: LVDS1 model: Apple 0x9cc5
    built: 2009 res: 1280x800 hz: 60 dpi: 112 gamma: 1.2
    size: 290x180mm (11.42x7.09") diag: 337mm (13.3")
    ratio: 16:10 modes: 1280x800
  API: OpenGL v: 4.2 Mesa 22.3.2 renderer: Mesa Intel HD
    Graphics 4000 (IVB GT2) direct render: Yes
Audio:
  Device-1: Intel 7 Series/C216 Family High Definition Audio
    driver: snd_hda_intel v: kernel bus-ID: 00:1b.0
    chip-ID: 8086:1e20 class-ID: 0403
  Sound API: ALSA v: k6.1.4-zen2-1-zen running: yes
  Sound Interface: sndio v: N/A running: no
  Sound Server-1: JACK v: 1.9.21 running: no
  Sound Server-2: PulseAudio v: 16.1 running: yes
  Sound Server-3: PipeWire v: 0.3.63 running: no
Network:
  Device-1: Broadcom NetXtreme BCM57765 Gigabit Ethernet PCIe
    driver: tg3 v: kernel pcie: gen: 1 speed: 2.5 GT/s lanes: 1
    port: N/A bus-ID: 01:00.0 chip-ID: 14e4:16b4 class-ID: 0200
  IF: enp1s0f0 state: down mac: <filter>
  Device-2: Broadcom BCM4331 802.11a/b/g/n
    vendor: Apple AirPort Extreme driver: wl v: kernel
    modules: bcma pcie: gen: 1 speed: 2.5 GT/s lanes: 1
    bus-ID: 02:00.0 chip-ID: 14e4:4331 class-ID: 0280
  IF: wlp2s0 state: up mac: <filter>
  IF-ID-1: anbox0 state: down mac: <filter>
  IF-ID-2: virbr0 state: down mac: <filter>
Bluetooth:
  Device-1: Apple Bluetooth USB Host Controller type: USB
    driver: btusb v: 0.8 bus-ID: 2-1.8.1.3:9 chip-ID: 05ac:821d
    class-ID: fe01
  Report: bt-adapter ID: hci0 rfk-id: 1 state: up
    address: <filter>
Drives:
  Local Storage: total: 931.51 GiB used: 385.75 GiB (41.4%)
  SMART Message: Unable to run smartctl. Root privileges
    required.
  ID-1: /dev/sda maj-min: 8:0 vendor: Crucial
    model: CT1000MX500SSD1 size: 931.51 GiB block-size:
    physical: 4096 B logical: 512 B speed: 6.0 Gb/s type: SSD
    serial: <filter> rev: 033 temp: 36 C scheme: GPT
Partition:
  ID-1: / raw-size: 922.99 GiB size: 922.99 GiB (100.00%)
    used: 385.68 GiB (41.8%) fs: btrfs dev: /dev/sda2
    maj-min: 8:2
  ID-2: /boot/efi raw-size: 300 MiB size: 299.4 MiB (99.80%)
    used: 70.7 MiB (23.6%) fs: vfat dev: /dev/sda1 maj-min: 8:1
  ID-3: /home raw-size: 922.99 GiB size: 922.99 GiB (100.00%)
    used: 385.68 GiB (41.8%) fs: btrfs dev: /dev/sda2
    maj-min: 8:2
  ID-4: /var/log raw-size: 922.99 GiB
    size: 922.99 GiB (100.00%) used: 385.68 GiB (41.8%) fs: btrfs
    dev: /dev/sda2 maj-min: 8:2
  ID-5: /var/tmp raw-size: 922.99 GiB
    size: 922.99 GiB (100.00%) used: 385.68 GiB (41.8%) fs: btrfs
    dev: /dev/sda2 maj-min: 8:2
Swap:
  Kernel: swappiness: 133 (default 60)
    cache-pressure: 100 (default)
  ID-1: swap-1 type: zram size: 3.74 GiB
    used: 552.2 MiB (14.4%) priority: 100 dev: /dev/zram0
  ID-2: swap-2 type: partition size: 8.23 GiB
    used: 0 KiB (0.0%) priority: -2 dev: /dev/sda3 maj-min: 8:3
Sensors:
  System Temperatures: cpu: 64.0 C mobo: N/A
  Fan Speeds (RPM): N/A
Info:
  Processes: 247 Uptime: 12m wakeups: 3 Memory: 3.74 GiB
  used: 2.08 GiB (55.5%) Init: systemd v: 252
  default: multi-user tool: systemctl Compilers: gcc: 12.2.0
  clang: 14.0.6 Packages: 2923 pm: dpkg pkgs: 0 pm: pacman
  pkgs: 2900 libs: 574
  tools: gnome-software,octopi,pamac,paru,trizen,yay
  pm: flatpak pkgs: 23 Shell: fish v: 3.5.1
  running-in: alacritty inxi: 3.3.24
Garuda (2.6.14-1):
  System install date:     2022-04-24
  Last full system update: 2023-01-11 ↻
  Is partially upgraded:   Yes
  Relevant software:       snapper NetworkManager mkinitcpio
  Windows dual boot:       No/Undetected
  Failed units:            systemd-networkd-wait-online.service 

Bring your system fully up to date:

garuda-update

Then reboot. If that doesn't resolve the issue, please re-post the garuda-inxi afterward.

3 Likes

New garuda-inxi

System:
  Kernel: 6.1.6-zen1-2-zen arch: x86_64 bits: 64 compiler: gcc v: 12.2.1
    parameters: BOOT_IMAGE=/@/boot/vmlinuz-linux-zen
    root=UUID=4099c804-740b-4c2b-be89-691b4c6c569a rw [email protected]
    rd.udev.log_priority=3 vt.global_cursor_default=0
    resume=UUID=7a2bef2e-2051-49ea-b2c2-476cfbd79f28 loglevel=3
    sdhci.debug_quirks2=4 ibt=off
  Desktop: dwm v: 6.3 vt: 1 dm: LightDM v: 1.32.0 Distro: Garuda Linux
    base: Arch Linux
Machine:
  Type: Laptop System: Apple product: MacBookPro9,2 v: 1.0
    serial: <superuser required> Chassis: type: 10 v: Mac-6F01561E16C75D06
    serial: <superuser required>
  Mobo: Apple model: Mac-6F01561E16C75D06 v: MacBookPro9,2
    serial: <superuser required> UEFI: Apple v: 425.0.0.0.0 date: 10/26/2021
Battery:
  ID-1: BAT0 charge: 42.2 Wh (85.1%) condition: 49.6/62.9 Wh (78.9%)
    volts: 12.4 min: 10.9 model: SMP bq20z451 type: Li-ion serial: N/A
    status: charging cycles: 402
CPU:
  Info: model: Intel Core i5-3210M bits: 64 type: MT MCP arch: Ivy Bridge
    gen: core 3 level: v2 built: 2012-15 process: Intel 22nm family: 6
    model-id: 0x3A (58) stepping: 9 microcode: 0x21
  Topology: cpus: 1x cores: 2 tpc: 2 threads: 4 smt: enabled cache:
    L1: 128 KiB desc: d-2x32 KiB; i-2x32 KiB L2: 512 KiB desc: 2x256 KiB
    L3: 3 MiB desc: 1x3 MiB
  Speed (MHz): avg: 2990 high: 3024 min/max: 1200/3100 scaling:
    driver: intel_cpufreq governor: performance cores: 1: 2972 2: 3011 3: 3024
    4: 2953 bogomips: 19954
  Flags: avx ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx
  Vulnerabilities: <filter>
Graphics:
  Device-1: Intel 3rd Gen Core processor Graphics vendor: Apple driver: i915
    v: kernel arch: Gen-7 process: Intel 22nm built: 2012-13 ports:
    active: LVDS-1 empty: DP-1, DP-2, DP-3, HDMI-A-1, HDMI-A-2, HDMI-A-3,
    VGA-1 bus-ID: 00:02.0 chip-ID: 8086:0166 class-ID: 0300
  Device-2: Apple FaceTime HD Camera type: USB driver: uvcvideo
    bus-ID: 1-1.1:3 chip-ID: 05ac:8509 class-ID: 0e02 serial: <filter>
  Display: server: X.Org v: 21.1.6 with: Xwayland v: 22.1.7 driver: X:
    loaded: intel unloaded: modesetting,vesa alternate: fbdev dri: crocus
    gpu: i915 display-ID: :0 screens: 1
  Screen-1: 0 s-res: 1280x800 s-dpi: 96 s-size: 338x211mm (13.31x8.31")
    s-diag: 398mm (15.69")
  Monitor-1: LVDS-1 mapped: LVDS1 model: Apple 0x9cc5 built: 2009
    res: 1280x800 hz: 60 dpi: 112 gamma: 1.2 size: 290x180mm (11.42x7.09")
    diag: 337mm (13.3") ratio: 16:10 modes: 1280x800
  API: OpenGL v: 4.2 Mesa 22.3.3 renderer: Mesa Intel HD Graphics 4000 (IVB
    GT2) direct render: Yes
Audio:
  Device-1: Intel 7 Series/C216 Family High Definition Audio
    driver: snd_hda_intel v: kernel bus-ID: 00:1b.0 chip-ID: 8086:1e20
    class-ID: 0403
  Sound API: ALSA v: k6.1.6-zen1-2-zen running: yes
  Sound Interface: sndio v: N/A running: no
  Sound Server-1: JACK v: 1.9.21 running: no
  Sound Server-2: PulseAudio v: 16.1 running: yes
  Sound Server-3: PipeWire v: 0.3.64 running: no
Network:
  Device-1: Broadcom NetXtreme BCM57765 Gigabit Ethernet PCIe driver: tg3
    v: kernel pcie: gen: 1 speed: 2.5 GT/s lanes: 1 port: N/A bus-ID: 01:00.0
    chip-ID: 14e4:16b4 class-ID: 0200
  IF: enp1s0f0 state: down mac: <filter>
  Device-2: Broadcom BCM4331 802.11a/b/g/n vendor: Apple AirPort Extreme
    driver: wl v: kernel modules: bcma pcie: gen: 1 speed: 2.5 GT/s lanes: 1
    bus-ID: 02:00.0 chip-ID: 14e4:4331 class-ID: 0280
  IF: wlp2s0 state: up mac: <filter>
  IF-ID-1: anbox0 state: down mac: <filter>
  IF-ID-2: virbr0 state: down mac: <filter>
Bluetooth:
  Device-1: Apple Bluetooth USB Host Controller type: USB driver: btusb v: 0.8
    bus-ID: 2-1.8.1.3:9 chip-ID: 05ac:821d class-ID: fe01
  Report: bt-adapter ID: hci0 rfk-id: 1 state: up address: <filter>
Drives:
  Local Storage: total: 931.51 GiB used: 400.31 GiB (43.0%)
  SMART Message: Unable to run smartctl. Root privileges required.
  ID-1: /dev/sda maj-min: 8:0 vendor: Crucial model: CT1000MX500SSD1
    size: 931.51 GiB block-size: physical: 4096 B logical: 512 B speed: 6.0 Gb/s
    type: SSD serial: <filter> rev: 033 temp: 37 C scheme: GPT
Partition:
  ID-1: / raw-size: 922.99 GiB size: 922.99 GiB (100.00%)
    used: 400.24 GiB (43.4%) fs: btrfs dev: /dev/sda2 maj-min: 8:2
  ID-2: /boot/efi raw-size: 300 MiB size: 299.4 MiB (99.80%)
    used: 70.7 MiB (23.6%) fs: vfat dev: /dev/sda1 maj-min: 8:1
  ID-3: /home raw-size: 922.99 GiB size: 922.99 GiB (100.00%)
    used: 400.24 GiB (43.4%) fs: btrfs dev: /dev/sda2 maj-min: 8:2
  ID-4: /var/log raw-size: 922.99 GiB size: 922.99 GiB (100.00%)
    used: 400.24 GiB (43.4%) fs: btrfs dev: /dev/sda2 maj-min: 8:2
  ID-5: /var/tmp raw-size: 922.99 GiB size: 922.99 GiB (100.00%)
    used: 400.24 GiB (43.4%) fs: btrfs dev: /dev/sda2 maj-min: 8:2
Swap:
  Kernel: swappiness: 133 (default 60) cache-pressure: 100 (default)
  ID-1: swap-1 type: zram size: 3.74 GiB used: 0 KiB (0.0%) priority: 100
    dev: /dev/zram0
  ID-2: swap-2 type: partition size: 8.23 GiB used: 0 KiB (0.0%)
    priority: -2 dev: /dev/sda3 maj-min: 8:3
Sensors:
  System Temperatures: cpu: 68.0 C mobo: N/A
  Fan Speeds (RPM): N/A
Info:
  Processes: 206 Uptime: 1m wakeups: 2 Memory: 3.74 GiB
  used: 778.5 MiB (20.3%) Init: systemd v: 252 default: multi-user
  tool: systemctl Compilers: gcc: 12.2.1 clang: 15.0.7 Packages: 2927 pm: dpkg
  pkgs: 0 pm: pacman pkgs: 2904 libs: 574
  tools: gnome-software,octopi,pamac,paru,trizen,yay pm: flatpak pkgs: 23
  Shell: fish v: 3.6.0 running-in: alacritty inxi: 3.3.24
Garuda (2.6.14-1):
  System install date:     2022-04-24
  Last full system update: 2023-01-18 ↻
  Is partially upgraded:   No
  Relevant software:       snapper NetworkManager mkinitcpio
  Windows dual boot:       No/Undetected
  Failed units:            

The brightness does seem to change depending if it's turned on with the lid open or closed.

are you sure it's caused by that arandr change? Is it reproducible? Have you tried xrandr --listmonitors? Anything of interest in dmesg? What if you try to set the brightness via xrandr --brightness?

While writing this I noticed that my brightness folder is also empty, are you sure there was a file in there before?

1 Like

I'm not sure if it was caused by arandr, and there was definitley a file there before, as xbacklight and gbacklight both worked a while ago. xrandr -brightness just changes gamma, not backlight.