Lost brightness control after reinstall

Hi fellow Linux lovers.
I recently reinstalled my Garuda due to package issues, and i can no longer change my brightness.

I used to have the brightness control under the battery tray icon, but it is no longer there.
And i can not control the brightness with the keyboard shortcuts either.
I booted up a live USB and the brightness controls are there, just not in my install.
Here are some screenshots.

The live usb

And my install

And here is my inxi output

╰─λ garuda-inxi
Kernel: 6.2.2-zen1-1-zen arch: x86_64 bits: 64 compiler: gcc v: 12.2.1
parameters: BOOT_IMAGE=/@/boot/vmlinuz-linux-zen
root=UUID=20bc95d4-ae4d-4478-bc06-8f41b580fbe1 rw [email protected]
quiet quiet splash rd.udev.log_priority=3 vt.global_cursor_default=0
resume=UUID=f403acd8-a61f-4949-b37c-5a6faafc7937 loglevel=3 ibt=off
Desktop: KDE Plasma v: 5.27.2 tk: Qt v: 5.15.8 wm: kwin_x11 vt: 1 dm: SDDM
Distro: Garuda Linux base: Arch Linux
Type: Laptop System: ASUSTeK product: G74Sx v: 1.0
serial: <superuser required>
Mobo: ASUSTeK model: G74Sx v: 1.0 serial: <superuser required>
BIOS: American Megatrends v: G74Sx.203 date: 09/23/2011
ID-1: BAT0 charge: 34.0 Wh (99.1%) condition: 34.3/61.6 Wh (55.7%)
volts: 16.4 min: 14.4 model: ASUSTek G74--52 type: Li-ion serial: N/A
status: not charging
Info: model: Intel Core i7-2670QM bits: 64 type: MT MCP arch: Sandy Bridge
gen: core 2 level: v2 built: 2010-12 process: Intel 32nm family: 6
model-id: 0x2A (42) stepping: 7 microcode: 0x2F
Topology: cpus: 1x cores: 4 tpc: 2 threads: 8 smt: enabled cache:
L1: 256 KiB desc: d-4x32 KiB; i-4x32 KiB L2: 1024 KiB desc: 4x256 KiB
L3: 6 MiB desc: 1x6 MiB
Speed (MHz): avg: 1374 high: 3100 min/max: 800/3100 scaling:
driver: intel_cpufreq governor: schedutil cores: 1: 3100 2: 3100 3: 798
4: 798 5: 800 6: 800 7: 800 8: 800 bogomips: 35121
Flags: avx ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx
Vulnerabilities: <filter>
Device-1: NVIDIA GF116M [GeForce GT 560M] vendor: ASUSTeK driver: nvidia
v: 390.157 alternate: nouveau,nvidia_drm non-free: series: 390.xx+
status: legacy-active (EOL~late 2022) arch: Fermi code: GF1xx
process: 40/28nm built: 2010-16 pcie: gen: 2 speed: 5 GT/s lanes: 16
bus-ID: 01:00.0 chip-ID: 10de:1251 class-ID: 0300
Device-2: IMC Networks Integrated Webcam type: USB driver: uvcvideo
bus-ID: 1-1.2:4 chip-ID: 13d3:5134 class-ID: 0e02
Display: x11 server: X.Org v: 21.1.7 with: Xwayland v: 22.1.8
compositor: kwin_x11 driver: X: loaded: nvidia unloaded: modesetting,nouveau
alternate: fbdev,nv,vesa gpu: nvidia display-ID: :0 screens: 1
Screen-1: 0 s-res: 1920x1080 s-dpi: 128 s-size: 381x211mm (15.00x8.31")
s-diag: 436mm (17.15")
Monitor-1: LVDS-0 res: 1920x1080 hz: 60 dpi: 128
size: 382x215mm (15.04x8.46") diag: 438mm (17.26") modes: N/A
API: OpenGL v: 4.6.0 NVIDIA 390.157 renderer: GeForce GTX 560M/PCIe/SSE2
direct-render: Yes
Device-1: Intel 6 Series/C200 Series Family High Definition Audio
vendor: ASUSTeK driver: snd_hda_intel v: kernel bus-ID: 00:1b.0
chip-ID: 8086:1c20 class-ID: 0403
Device-2: NVIDIA GF116 High Definition Audio vendor: ASUSTeK
driver: snd_hda_intel v: kernel pcie: gen: 2 speed: 5 GT/s lanes: 16
bus-ID: 01:00.1 chip-ID: 10de:0bee class-ID: 0403
Sound API: ALSA v: k6.2.2-zen1-1-zen running: yes
Sound Server-1: PulseAudio v: 16.1 running: no
Sound Server-2: PipeWire v: 0.3.66 running: yes
Device-1: Intel Centrino Advanced-N 6235 driver: iwlwifi v: kernel pcie:
gen: 1 speed: 2.5 GT/s lanes: 1 bus-ID: 03:00.0 chip-ID: 8086:088e
class-ID: 0280
IF: wlp3s0 state: up mac: <filter>
Device-2: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet
vendor: ASUSTeK U6V/U31J laptop driver: r8169 v: kernel pcie: gen: 1
speed: 2.5 GT/s lanes: 1 port: a000 bus-ID: 04:00.0 chip-ID: 10ec:8168
class-ID: 0200
IF: enp4s0 state: down mac: <filter>
Device-1: Intel Centrino Bluetooth Wireless Transceiver type: USB
driver: btusb v: 0.8 bus-ID: 1-1.1:3 chip-ID: 8087:07da class-ID: e001
Report: bt-adapter ID: hci0 rfk-id: 1 state: up address: <filter>
Local Storage: total: 965.93 GiB used: 272.39 GiB (28.2%)
SMART Message: Unable to run smartctl. Root privileges required.
ID-1: /dev/sda maj-min: 8:0 vendor: LITE-ON IT model: LAT-256M3S
size: 238.47 GiB block-size: physical: 512 B logical: 512 B speed: 6.0 Gb/s
type: SSD serial: <filter> rev: VBA2 scheme: GPT
ID-2: /dev/sdb maj-min: 8:16 vendor: Western Digital
model: WD7500BPKX-00HPJT0 size: 698.64 GiB block-size: physical: 4096 B
logical: 512 B speed: 6.0 Gb/s type: HDD rpm: 7200 serial: <filter>
rev: 1A01 scheme: MBR
ID-3: /dev/sdc maj-min: 8:32 type: USB vendor: Kingston
model: DataTraveler 3.0 size: 28.82 GiB block-size: physical: 512 B
logical: 512 B type: N/A serial: <filter> scheme: MBR
SMART Message: Unknown USB bridge. Flash drive/Unsupported enclosure?
ID-1: / raw-size: 230.46 GiB size: 230.46 GiB (100.00%)
used: 20.43 GiB (8.9%) fs: btrfs dev: /dev/sda3 maj-min: 8:3
ID-2: /home raw-size: 230.46 GiB size: 230.46 GiB (100.00%)
used: 20.43 GiB (8.9%) fs: btrfs dev: /dev/sda3 maj-min: 8:3
ID-3: /var/log raw-size: 230.46 GiB size: 230.46 GiB (100.00%)
used: 20.43 GiB (8.9%) fs: btrfs dev: /dev/sda3 maj-min: 8:3
ID-4: /var/tmp raw-size: 230.46 GiB size: 230.46 GiB (100.00%)
used: 20.43 GiB (8.9%) fs: btrfs dev: /dev/sda3 maj-min: 8:3
Kernel: swappiness: 133 (default 60) cache-pressure: 100 (default)
ID-1: swap-1 type: zram size: 19.51 GiB used: 0 KiB (0.0%) priority: 100
dev: /dev/zram0
ID-2: swap-2 type: partition size: 8 GiB used: 0 KiB (0.0%) priority: -2
dev: /dev/sda2 maj-min: 8:2
System Temperatures: cpu: 41.0 C mobo: N/A gpu: nvidia temp: 38 C
Fan Speeds (RPM): cpu: 2200
Processes: 281 Uptime: 19m wakeups: 1 Memory: 19.51 GiB
used: 3.24 GiB (16.6%) Init: systemd v: 253 default: graphical
tool: systemctl Compilers: gcc: 12.2.1 Packages: pm: pacman pkgs: 1873
libs: 446 tools: octopi,pamac,paru Shell: fish v: 3.6.0 default: Bash
v: 5.1.16 running-in: konsole inxi: 3.3.25
Garuda (2.6.15-1):
System install date:     2023-02-23
Last full system update: 2023-03-11 ↻
Is partially upgraded:   No
Relevant software:       snapper NetworkManager mkinitcpio
Windows dual boot:       <superuser required>
Failed units:            systemd-vconsole-setup.service

Any help would be greatly appreciated.

Check if you have in the journal errors similar to those in this bug report.
The reporter is mentioning external monitor, but you never can say...


OK thanks, I will look into that

OK i ran journalctl | grep devil and found a few possibly related entries.

Mar 12 04:54:56 Garuda backlighthelper[1295]: org.kde.powerdevil: no kernel backlight interface found

Mar 12 04:54:56 Garuda org_kde_powerdevil[1254]: org.kde.powerdevil: org.kde.powerdevil.backlighthelper.bright
ness failed
Mar 12 04:54:57 Garuda org_kde_powerdevil[1254]: org.kde.powerdevil: Handle button events action could not che
ck for screen configuration

I have no experience in this area so i have no clue what actions i should take here.

I would say that there is a good chance that it is the same bug, and that you should therefore wait for the KDE fix (and for it to be released).


Thanks for the help

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