Hello Manjaro Community,
I’m relatively new to Linux and could use some guidance on how to tackle this issue. Your assistance would be greatly appreciated.
So I’ve recently encountered an issue with my screen brightness. Unfortunately, I can’t pinpoint what triggered it, as I only noticed it recently. I’ve scoured the forums and tried several solutions, but the problem persists.
The core problem is that my screen brightness remains fixed at a constant level, regardless of my attempts to adjust it.
Here’s what I’ve done so far:
I added the i915.enable_dpcd_backlight=0 boot parameter to GRUB_CMDLINE_LINUX_DEFAULT in the /etc/default/grub file. Afterward, I ran the following command: sudo update-grub and rebooted my system. However, this didn’t resolve the issue.
I also attempted using the acpi_backlight=video option, which brought back the brightness control interface when I used the function keys (F5 and F6). Furthermore, when I ran the brightnessctl command, it reported a change in brightness levels, as shown below::
Device 'acpi_video0' of class 'backlight':
Current brightness: 1 (7%)
Max brightness: 15
This is an improvement from the previous state, where brightnessctl would show no change and the brightness control interface wouldn’t show up when using the function keys. However, despite these indications of adjustments, there is no observable change in screen brightness and it remains excessively bright as before… (I also tried the same with vendor and native)
If it helps to with the issue, I’ve read that ThinkPad laptops, such as my ThinkPad X13, typically utilize ACPI for screen brightness control.
Edit; Additional info
System:
Kernel: 6.4.12-zen1-1-zen arch: x86_64 bits: 64 compiler: gcc v: 13.2.1
clocksource: tsc available: hpet,acpi_pm
parameters: BOOT_IMAGE=/boot/vmlinuz-linux-zen
root=UUID=cbfd4763-2607-4b8c-ab5f-d49265f317d1 rw quiet splash apparmor=1
security=apparmor udev.log_priority=3 acpi_backlight=video
Desktop: GNOME v: 44.5 tk: GTK v: 3.24.38 wm: gnome-shell dm: GDM v: 44.1
Distro: Manjaro Linux base: Arch Linux
Machine:
Type: Laptop System: LENOVO product: 20XHCTO1WW v: ThinkPad X13 Gen 2a
serial: <superuser required> Chassis: type: 10 serial: <superuser required>
Mobo: LENOVO model: 20XHCTO1WW serial: <superuser required> UEFI: LENOVO
v: R1NET56W (1.26) date: 02/21/2023
Battery:
ID-1: BAT0 charge: 45.4 Wh (83.6%) condition: 54.3/54.7 Wh (99.3%)
power: 15.9 W volts: 16.4 min: 15.4 model: Sunwoda 5B10W51820 type: Li-poly
serial: <filter> status: discharging cycles: 22
Memory:
System RAM: total: 16 GiB note: est. available: 14.46 GiB
used: 3.49 GiB (24.1%)
RAM Report: permissions: Unable to run dmidecode. Root privileges
required.
CPU:
Info: model: AMD Ryzen 5 PRO 5650U with Radeon Graphics bits: 64
type: MT MCP arch: Zen 3 gen: 4 level: v3 note: check built: 2021-22
process: TSMC n7 (7nm) family: 0x19 (25) model-id: 0x50 (80) stepping: 0
microcode: 0xA50000D
Topology: cpus: 1x cores: 6 tpc: 2 threads: 12 smt: enabled cache:
L1: 384 KiB desc: d-6x32 KiB; i-6x32 KiB L2: 3 MiB desc: 6x512 KiB
L3: 16 MiB desc: 1x16 MiB
Speed (MHz): avg: 1519 high: 2389 min/max: 1600/4288 boost: enabled
scaling: driver: acpi-cpufreq governor: schedutil cores: 1: 1397 2: 1450
3: 1444 4: 1445 5: 2389 6: 1429 7: 1360 8: 1449 9: 1737 10: 1366 11: 1371
12: 1397 bogomips: 55092
Flags: 3dnowprefetch abm adx aes aperfmperf apic arat avic avx avx2 bmi1
bmi2 bpext cat_l3 cdp_l3 clflush clflushopt clwb clzero cmov cmp_legacy
constant_tsc cpb cppc cpuid cqm cqm_llc cqm_mbm_local cqm_mbm_total
cqm_occup_llc cr8_legacy cx16 cx8 de decodeassists erms extapic
extd_apicid f16c flushbyasid fma fpu fsgsbase fsrm fxsr fxsr_opt ht
hw_pstate ibpb ibrs ibs invpcid irperf lahf_lm lbrv lm mba mca mce
misalignsse mmx mmxext monitor movbe msr mtrr mwaitx nonstop_tsc nopl npt
nrip_save nx ospke osvw overflow_recov pae pat pausefilter pclmulqdq
pdpe1gb perfctr_core perfctr_llc perfctr_nb pfthreshold pge pku pni
popcnt pse pse36 rapl rdpid rdpru rdrand rdseed rdt_a rdtscp rep_good sep
sha_ni skinit smap smca smep ssbd sse sse2 sse4_1 sse4_2 sse4a ssse3
stibp succor svm svm_lock syscall tce topoext tsc tsc_scale umip
v_spec_ctrl v_vmsave_vmload vaes vgif vmcb_clean vme vmmcall vpclmulqdq
wbnoinvd wdt xgetbv1 xsave xsavec xsaveerptr xsaveopt xsaves
Vulnerabilities:
Type: gather_data_sampling status: Not affected
Type: itlb_multihit status: Not affected
Type: l1tf status: Not affected
Type: mds status: Not affected
Type: meltdown status: Not affected
Type: mmio_stale_data status: Not affected
Type: retbleed status: Not affected
Type: spec_rstack_overflow mitigation: safe RET, no microcode
Type: spec_store_bypass mitigation: Speculative Store Bypass disabled via
prctl
Type: spectre_v1 mitigation: usercopy/swapgs barriers and __user pointer
sanitization
Type: spectre_v2 mitigation: Retpolines, IBPB: conditional, IBRS_FW,
STIBP: always-on, RSB filling, PBRSB-eIBRS: Not affected
Type: srbds status: Not affected
Type: tsx_async_abort status: Not affected
Graphics:
Device-1: AMD Cezanne [Radeon Vega Series / Radeon Mobile Series]
vendor: Lenovo driver: N/A alternate: amdgpu arch: GCN-5 code: Vega
process: GF 14nm built: 2017-20 pcie: gen: 3 speed: 8 GT/s lanes: 16
link-max: gen: 4 speed: 16 GT/s bus-ID: 05:00.0 chip-ID: 1002:1638
class-ID: 0300
Device-2: Chicony Integrated Camera driver: uvcvideo type: USB rev: 2.0
speed: 480 Mb/s lanes: 1 mode: 2.0 bus-ID: 1-2:2 chip-ID: 04f2:b70f
class-ID: 0e02 serial: <filter>
Display: wayland server: X.Org v: 23.2.1 with: Xwayland v: 23.2.1
compositor: gnome-shell driver: X: loaded: amdgpu
unloaded: modesetting,radeon alternate: fbdev,vesa dri: radeonsi gpu: N/A
display-ID: :0 screens: 1
Screen-1: 0 s-res: 1920x1200 s-dpi: 96 s-size: 508x317mm (20.00x12.48")
s-diag: 599mm (23.57")
Monitor-1: Unknown-1 mapped: None-1 res: 1920x1200 hz: 60 dpi: 96
size: 508x317mm (20x12.48") modes: 1920x1200
API: EGL v: 1.5 platforms: device: 0 drv: swrast gbm: drv: kms_swrast
surfaceless: drv: swrast wayland: drv: swrast x11: drv: swrast
API: OpenGL v: 4.5 vendor: mesa v: 23.1.9-manjaro1.1 glx-v: 1.4
direct-render: yes renderer: llvmpipe (LLVM 16.0.6 256 bits)
device-ID: ffffffff:ffffffff memory: 14.12 GiB unified: yes
Audio:
Device-1: AMD Renoir Radeon High Definition Audio vendor: Lenovo
driver: snd_hda_intel v: kernel pcie: gen: 3 speed: 8 GT/s lanes: 16
link-max: gen: 4 speed: 16 GT/s bus-ID: 05:00.1 chip-ID: 1002:1637
class-ID: 0403
Device-2: AMD ACP/ACP3X/ACP6x Audio Coprocessor vendor: Lenovo
driver: snd_rn_pci_acp3x v: kernel alternate: snd_pci_acp3x, snd_pci_acp5x,
snd_pci_acp6x, snd_acp_pci, snd_rpl_pci_acp6x, snd_pci_ps,
snd_sof_amd_renoir, snd_sof_amd_rembrandt pcie: gen: 3 speed: 8 GT/s
lanes: 16 link-max: gen: 4 speed: 16 GT/s bus-ID: 05:00.5
chip-ID: 1022:15e2 class-ID: 0480
Device-3: AMD Family 17h/19h HD Audio vendor: Lenovo driver: snd_hda_intel
v: kernel pcie: gen: 3 speed: 8 GT/s lanes: 16 link-max: gen: 4
speed: 16 GT/s bus-ID: 05:00.6 chip-ID: 1022:15e3 class-ID: 0403
API: ALSA v: k6.4.12-zen1-1-zen status: kernel-api with: aoss
type: oss-emulator tools: alsactl,alsamixer,amixer
Server-1: JACK v: 1.9.22 status: off tools: N/A
Server-2: PipeWire v: 0.3.81 status: off tools: pw-cli
Server-3: PulseAudio v: 16.1 status: active with: pulseaudio-alsa
type: plugin tools: pacat,pactl
Network:
Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet
vendor: Lenovo driver: r8169 v: kernel pcie: gen: 1 speed: 2.5 GT/s lanes: 1
port: 2000 bus-ID: 02:00.0 chip-ID: 10ec:8168 class-ID: 0200
IF: enp2s0f0 state: down mac: <filter>
Device-2: MEDIATEK MT7921 802.11ax PCI Express Wireless Network Adapter
vendor: Lenovo driver: mt7921e v: kernel pcie: gen: 2 speed: 5 GT/s lanes: 1
bus-ID: 03:00.0 chip-ID: 14c3:7961 class-ID: 0280
IF: wlp3s0 state: up mac: <filter>
IP v4: <filter> type: dynamic noprefixroute scope: global
broadcast: <filter>
IP v6: <filter> type: dynamic noprefixroute scope: global
IP v6: <filter> type: noprefixroute scope: link
WAN IP: <filter>
Bluetooth:
Device-1: Foxconn / Hon Hai MediaTek Bluetooth Adapter driver: btusb v: 0.8
type: USB rev: 2.1 speed: 480 Mb/s lanes: 1 mode: 2.0 bus-ID: 5-4:3
chip-ID: 0489:e0cd class-ID: e001 serial: <filter>
Report: rfkill ID: hci0 rfk-id: 0 state: up address: see --recommends
Logical:
Message: No logical block device data found.
RAID:
Message: No RAID data found.
Drives:
Local Storage: total: 953.87 GiB used: 42.84 GiB (4.5%)
SMART Message: Required tool smartctl not installed. Check --recommends
ID-1: /dev/nvme0n1 maj-min: 259:0 vendor: Micron model: MTFDKBA1T0TFK
size: 953.87 GiB block-size: physical: 512 B logical: 512 B speed: 63.2 Gb/s
lanes: 4 tech: SSD serial: <filter> fw-rev: 7003V5LN temp: 34.9 C
scheme: GPT
Message: No optical or floppy data found.
Partition:
ID-1: / raw-size: 953.57 GiB size: 937.53 GiB (98.32%)
used: 42.84 GiB (4.6%) fs: ext4 dev: /dev/nvme0n1p2 maj-min: 259:2
label: N/A uuid: cbfd4763-2607-4b8c-ab5f-d49265f317d1
ID-2: /boot/efi raw-size: 300 MiB size: 299.4 MiB (99.80%)
used: 288 KiB (0.1%) fs: vfat dev: /dev/nvme0n1p1 maj-min: 259:1 label: N/A
uuid: D6D6-314E
Swap:
Alert: No swap data was found.
Unmounted:
Message: No unmounted partitions found.
USB:
Hub-1: 1-0:1 info: hi-speed hub with single TT ports: 2 rev: 2.0
speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 1d6b:0002
class-ID: 0900
Device-1: 1-2:2 info: Chicony Integrated Camera type: video
driver: uvcvideo interfaces: 2 rev: 2.0 speed: 480 Mb/s (57.2 MiB/s)
lanes: 1 mode: 2.0 power: 500mA chip-ID: 04f2:b70f class-ID: 0e02
serial: <filter>
Hub-2: 2-0:1 info: super-speed hub ports: 2 rev: 3.0
speed: 5 Gb/s (596.0 MiB/s) lanes: 1 mode: 3.2 gen-1x1 chip-ID: 1d6b:0003
class-ID: 0900
Hub-3: 3-0:1 info: hi-speed hub with single TT ports: 4 rev: 2.0
speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 1d6b:0002
class-ID: 0900
Hub-4: 4-0:1 info: super-speed hub ports: 2 rev: 3.1
speed: 10 Gb/s (1.16 GiB/s) lanes: 1 mode: 3.2 gen-2x1 chip-ID: 1d6b:0003
class-ID: 0900
Hub-5: 5-0:1 info: hi-speed hub with single TT ports: 4 rev: 2.0
speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 1d6b:0002
class-ID: 0900
Device-1: 5-3:2 info: Shenzhen Goodix USB2.0 MISC type: <vendor specific>
driver: N/A interfaces: 1 rev: 2.0 speed: 12 Mb/s (1.4 MiB/s) lanes: 1
mode: 1.1 power: 100mA chip-ID: 27c6:6594 class-ID: ef00 serial: <filter>
Device-2: 5-4:3 info: Foxconn / Hon Hai MediaTek Bluetooth Adapter
type: bluetooth driver: btusb interfaces: 3 rev: 2.1
speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 power: 100mA
chip-ID: 0489:e0cd class-ID: e001 serial: <filter>
Hub-6: 6-0:1 info: super-speed hub ports: 2 rev: 3.1
speed: 10 Gb/s (1.16 GiB/s) lanes: 1 mode: 3.2 gen-2x1 chip-ID: 1d6b:0003
class-ID: 0900
Sensors:
System Temperatures: cpu: 59.0 C mobo: N/A
Fan Speeds (rpm): fan-1: 2500 fan-2: 2500
Info:
Processes: 302 Uptime: 49m wakeups: 36510 Init: systemd v: 254
default: graphical tool: systemctl Compilers: gcc: 13.2.1 clang: 16.0.6
Packages: 2732 pm: pacman pkgs: 1366 libs: 384
tools: gnome-software,pamac,yay pm: rpm pkgs: N/A note: see --rpm tools: dnf
pm: flatpak pkgs: 0 Shell: Zsh v: 5.9 running-in: gnome-terminal
inxi: 3.3.30