Lenovo laptop brightness issue

Greetings!

Recent update broke my laptop screen brightness settings. And I`d like to know how to fix it.

I did a fresh install of Manjaro KDE 21.2.2 (Kernel 5.15.16-1) on a Lenovo Legion 5 (2020) laptop,
on this system changing display brightness worked fine.

Then I updated the system through Add/Remove Software (about 1.3 Gb of files to update), rebooted it and did not change the kernel - display brightness stopped working or rather got stuck on one setting (on which it was set before the update took place) despite moving the slider in Battery and Brightness applet or changing it via keyboard shortcuts.

Then I updated the kernel to 5.16.7-1, rebooted again, checked for updates (everything is up-to-date) and changing brightness still doesn`t work.

I`d like to fix this situation, but the only viable option that I can see is fresh installing the distro that I started out with and not updating it at all. Can someone help me?

please post the output of

ls /sys/class/backlight/

and

xrandr --verbose

amdgpu_bl1 nvidia_0

and

eDP connected primary 1920x1080+0+0 (0x54) normal (normal left inverted right x axis y axis) 344mm x 193mm
        Identifier: 0x52
        Timestamp:  15340
        Subpixel:   unknown
        Gamma:      1.0:1.0:1.0
        Brightness: 1.0
        Clones:    
        CRTC:       0
        CRTCs:      0 1 2 3
        Transform:  1.000000 0.000000 0.000000
                    0.000000 1.000000 0.000000
                    0.000000 0.000000 1.000000
                   filter: 
        EDID: 
                00ffffffffffff0006af8db700000000
                261d0104a5221378033e859156599128
                1f505400000001010101010101010101
                010101010101b68580a070383e406c30
                350058c1100000180000000000000000
                00000000000000000000000000fe0041
                554f0a202020202020202020000000fe
                004231353648414e30392e32200a009b
        GAMMA_LUT_SIZE: 4096 
                range: (0, -1)
        DEGAMMA_LUT_SIZE: 4096 
                range: (0, -1)
        GAMMA_LUT: 0 
                range: (0, 65535)
        CTM: 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 
                0 1 
        DEGAMMA_LUT: 0 
                range: (0, 65535)
        TearFree: auto 
                supported: off, on, auto
        HDCP Content Type: HDCP Type0 
                supported: HDCP Type0, HDCP Type1
        Content Protection: Undesired 
                supported: Undesired, Desired, Enabled
        vrr_capable: 0 
                range: (0, 1)
        abm level: 0 
                range: (0, 4)
        max bpc: 16 
                range: (8, 16)
        underscan vborder: 0 
                range: (0, 128)
        underscan hborder: 0 
                range: (0, 128)
        underscan: off 
                supported: off, on, auto
        scaling mode: None 
                supported: None, Full, Center, Full aspect
        link-status: Good 
                supported: Good, Bad
        CONNECTOR_ID: 78 
                supported: 78
        non-desktop: 0 
                range: (0, 1)
  1920x1080 (0x54) 342.300MHz -HSync -VSync *current +preferred
        h: width  1920 start 2028 end 2076 total 2080 skew    0 clock 164.57KHz
        v: height 1080 start 1083 end 1088 total 1142           clock 144.10Hz
  1680x1050 (0x55) 342.300MHz -HSync -VSync
        h: width  1680 start 2028 end 2076 total 2080 skew    0 clock 164.57KHz
        v: height 1050 start 1083 end 1088 total 1142           clock 144.10Hz
  1280x1024 (0x56) 342.300MHz -HSync -VSync
        h: width  1280 start 2028 end 2076 total 2080 skew    0 clock 164.57KHz
        v: height 1024 start 1083 end 1088 total 1142           clock 144.10Hz
  1440x900 (0x57) 342.300MHz -HSync -VSync
        h: width  1440 start 2028 end 2076 total 2080 skew    0 clock 164.57KHz
        v: height  900 start 1083 end 1088 total 1142           clock 144.10Hz
  1280x800 (0x58) 342.300MHz -HSync -VSync
        h: width  1280 start 2028 end 2076 total 2080 skew    0 clock 164.57KHz
        v: height  800 start 1083 end 1088 total 1142           clock 144.10Hz
  1280x720 (0x59) 342.300MHz -HSync -VSync
        h: width  1280 start 2028 end 2076 total 2080 skew    0 clock 164.57KHz
        v: height  720 start 1083 end 1088 total 1142           clock 144.10Hz
  1024x768 (0x5a) 342.300MHz -HSync -VSync
        h: width  1024 start 2028 end 2076 total 2080 skew    0 clock 164.57KHz
        v: height  768 start 1083 end 1088 total 1142           clock 144.10Hz
  800x600 (0x5b) 342.300MHz -HSync -VSync
        h: width   800 start 2028 end 2076 total 2080 skew    0 clock 164.57KHz
        v: height  600 start 1083 end 1088 total 1142           clock 144.10Hz
  640x480 (0x5c) 342.300MHz -HSync -VSync
        h: width   640 start 2028 end 2076 total 2080 skew    0 clock 164.57KHz
        v: height  480 start 1083 end 1088 total 1142           clock 144.10Hz
DP-1-0 disconnected (normal left inverted right x axis y axis)
        Identifier: 0x1f9
        Timestamp:  4591
        Subpixel:   unknown
        Clones:    
        CRTCs:      4 5 6 7
        Transform:  1.000000 0.000000 0.000000
                    0.000000 1.000000 0.000000
                    0.000000 0.000000 1.000000
                   filter: 
        PRIME Synchronization: 1 
                supported: 0, 1
        CTM: 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 
                0 1 
        CscMatrix: 65536 0 0 0 0 65536 0 0 0 0 65536 0 
        BorderDimensions: 4 
                supported: 4
        Border: 0 0 0 0 
                range: (0, 65535)
        SignalFormat: DisplayPort 
                supported: DisplayPort
        ConnectorType: DisplayPort 
        ConnectorNumber: 0 
        _ConnectorLocation: 0 
        non-desktop: 0 
                supported: 0, 1
DP-1-1 disconnected (normal left inverted right x axis y axis)
        Identifier: 0x1fa
        Timestamp:  4591
        Subpixel:   unknown
        Clones:    
        CRTCs:      4 5 6 7
        Transform:  1.000000 0.000000 0.000000
                    0.000000 1.000000 0.000000
                    0.000000 0.000000 1.000000
                   filter: 
        PRIME Synchronization: 1 
                supported: 0, 1
        CTM: 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 
                0 1 
        CscMatrix: 65536 0 0 0 0 65536 0 0 0 0 65536 0 
        BorderDimensions: 4 
                supported: 4
        Border: 0 0 0 0 
                range: (0, 65535)
        SignalFormat: TMDS 
                supported: TMDS
        ConnectorType: DisplayPort 
        ConnectorNumber: 0 
        _ConnectorLocation: 0 
        non-desktop: 0 
                supported: 0, 1
HDMI-1-0 disconnected (normal left inverted right x axis y axis)
        Identifier: 0x1fb
        Timestamp:  4591
        Subpixel:   unknown
        Clones:    
        CRTCs:      4 5 6 7
        Transform:  1.000000 0.000000 0.000000
                    0.000000 1.000000 0.000000
                    0.000000 0.000000 1.000000
                   filter: 
        PRIME Synchronization: 1 
                supported: 0, 1
        CTM: 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 
                0 1 
        CscMatrix: 65536 0 0 0 0 65536 0 0 0 0 65536 0 
        BorderDimensions: 4 
                supported: 4
        Border: 0 0 0 0 
                range: (0, 65535)
        SignalFormat: TMDS 
                supported: TMDS
        ConnectorType: HDMI 
        ConnectorNumber: 1 
        _ConnectorLocation: 1 
        non-desktop: 0 
                supported: 0, 1
DP-1-2 disconnected (normal left inverted right x axis y axis)
        Identifier: 0x1fc
        Timestamp:  4591
        Subpixel:   unknown
        Clones:    
        CRTCs:      4 5 6 7
        Transform:  1.000000 0.000000 0.000000
                    0.000000 1.000000 0.000000
                    0.000000 0.000000 1.000000
                   filter: 
        PRIME Synchronization: 1 
                supported: 0, 1
        CTM: 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 
                0 1 
        CscMatrix: 65536 0 0 0 0 65536 0 0 0 0 65536 0 
        BorderDimensions: 4 
                supported: 4
        Border: 0 0 0 0 
                range: (0, 65535)
        SignalFormat: DisplayPort 
                supported: DisplayPort
        ConnectorType: Panel 
        ConnectorNumber: 3 
        _ConnectorLocation: 3 
        non-desktop: 0 
                supported: 0, 1```

okay, let’s test something

xrandr --output 0x52 --brightness 0.5

(where brightness is between 0 and 1 in 0.1 steps)

does it affect the brightness ?

1 Like

Yes, it did. Brightness was lowered significantly.

okay, please set it back to 1 (that should be 100%). is it correct or still too dark ?

It feels like it was returned to 100%.

okay there is an issue with the lenovo and the kernel but the only description i got is from a lenovo 7 / 7i. can you check the hardware-difference between this and yours and additional please post the output as described here

:+1: Welcome to Manjaro! :+1:

  1. Please read this:
    [HowTo] Provide System Information
    and press the three dots … below your post and press the :pencil2: to give us more information so we can see what’s really going on.
    Now we know the symptom of the disease, but we need some more probing to know where the origin lies… :grin:
  2. An inxi --admin --verbosity=7 --filter --no-host --width would be the minimum required information for us to be able to help you. (Personally Identifiable Information like serial numbers and MAC addresses will be filtered out by the above command)
    Also, please copy-paste that output in-between 3 backticks ``` at the beginning and end of the code/text.

:+1:

1 Like

I`ve checked and the differences between Legion 5 and Legion 7 are negligible.

  Kernel: 5.16.7-1-MANJARO x86_64 bits: 64 compiler: gcc v: 11.1.0
    parameters: BOOT_IMAGE=/boot/vmlinuz-5.16-x86_64
    root=UUID=fd159167-2945-462b-8821-1e90ae3cf87b rw quiet apparmor=1
    security=apparmor udev.log_priority=3
  Desktop: KDE Plasma 5.23.5 tk: Qt 5.15.2 wm: kwin_x11 vt: 1 dm: SDDM
    Distro: Manjaro Linux base: Arch Linux
Machine:
  Type: Laptop System: LENOVO product: 82B1 v: Lenovo Legion 5 15ARH05H
    serial: <superuser required> Chassis: type: 10 v: Lenovo Legion 5 15ARH05H
    serial: <superuser required>
  Mobo: LENOVO model: LNVNB161216 v: NO DPK serial: <superuser required>
    UEFI: LENOVO v: FSCN18WW date: 01/01/2021
Battery:
  ID-1: BAT0 charge: 75.8 Wh (100.0%) condition: 75.8/80.0 Wh (94.7%)
    volts: 17.3 min: 15.4 model: Celxpert L19C4PC1 type: Li-poly
    serial: <filter> status: Full cycles: 41
Memory:
  RAM: total: 15.07 GiB used: 4.57 GiB (30.4%)
  RAM Report:
    permissions: Unable to run dmidecode. Root privileges required.
CPU:
  Info: model: AMD Ryzen 7 4800H with Radeon Graphics bits: 64 type: MT MCP
    arch: Zen 2 family: 0x17 (23) model-id: 0x60 (96) stepping: 1
    microcode: 0x8600104
  Topology: cpus: 1x cores: 8 tpc: 2 threads: 16 smt: enabled cache:
    L1: 512 KiB desc: d-8x32 KiB; i-8x32 KiB L2: 4 MiB desc: 8x512 KiB L3: 8 MiB
    desc: 2x4 MiB
  Speed (MHz): avg: 3953 high: 3968 min/max: 1400/2900 boost: enabled
    scaling: driver: acpi-cpufreq governor: schedutil cores: 1: 3957 2: 3958
    3: 3949 4: 3949 5: 3949 6: 3955 7: 3946 8: 3936 9: 3953 10: 3945 11: 3968
    12: 3964 13: 3956 14: 3960 15: 3957 16: 3954 bogomips: 92663
  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 cpuid cqm cqm_llc cqm_mbm_local cqm_mbm_total
    cqm_occup_llc cr8_legacy cx16 cx8 de decodeassists extapic extd_apicid
    f16c flushbyasid fma fpu fsgsbase fxsr fxsr_opt ht hw_pstate ibpb ibrs ibs
    irperf lahf_lm lbrv lm mba mca mce misalignsse mmx mmxext monitor movbe
    msr mtrr mwaitx nonstop_tsc nopl npt nrip_save nx osvw overflow_recov pae
    pat pausefilter pclmulqdq pdpe1gb perfctr_core perfctr_llc perfctr_nb
    pfthreshold pge 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 vgif vmcb_clean vme vmmcall
    wbnoinvd wdt xgetbv1 xsave xsavec xsaveerptr xsaveopt xsaves
  Vulnerabilities:
  Type: itlb_multihit status: Not affected
  Type: l1tf status: Not affected
  Type: mds status: Not affected
  Type: meltdown status: Not affected
  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: Full AMD retpoline, IBPB: conditional,
    IBRS_FW, STIBP: conditional, RSB filling
  Type: srbds status: Not affected
  Type: tsx_async_abort status: Not affected
Graphics:
  Device-1: NVIDIA TU106M [GeForce RTX 2060 Mobile] vendor: Lenovo
    driver: nvidia v: 510.47.03 alternate: nouveau,nvidia_drm bus-ID: 01:00.0
    chip-ID: 10de:1f15 class-ID: 0300
  Device-2: AMD Renoir vendor: Lenovo driver: amdgpu v: kernel
    bus-ID: 06:00.0 chip-ID: 1002:1636 class-ID: 0300
  Device-3: IMC Networks Integrated Camera type: USB driver: uvcvideo
    bus-ID: 3-3:2 chip-ID: 13d3:56ff class-ID: 0e02
  Display: x11 server: X.org 1.21.1.3 compositor: kwin_x11 driver:
    loaded: amdgpu,ati,nvidia unloaded: modesetting,nouveau
    alternate: fbdev,nv,vesa resolution: <missing: xdpyinfo>
  Message: Unable to show advanced data. Required tool glxinfo missing.
Audio:
  Device-1: NVIDIA TU106 High Definition Audio vendor: Lenovo
    driver: snd_hda_intel v: kernel bus-ID: 01:00.1 chip-ID: 10de:10f9
    class-ID: 0403
  Device-2: AMD Raven/Raven2/FireFlight/Renoir Audio Processor
    vendor: Lenovo driver: N/A
    alternate: snd_pci_acp3x, snd_rn_pci_acp3x, snd_pci_acp5x bus-ID: 06:00.5
    chip-ID: 1022:15e2 class-ID: 0480
  Device-3: AMD Family 17h HD Audio vendor: Lenovo driver: snd_hda_intel
    v: kernel bus-ID: 06:00.6 chip-ID: 1022:15e3 class-ID: 0403
  Sound Server-1: ALSA v: k5.16.7-1-MANJARO running: yes
  Sound Server-2: JACK v: 1.9.20 running: no
  Sound Server-3: PulseAudio v: 15.0 running: yes
  Sound Server-4: PipeWire v: 0.3.45 running: yes
Network:
  Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet
    vendor: Lenovo driver: r8169 v: kernel port: 2000 bus-ID: 03:00.0
    chip-ID: 10ec:8168 class-ID: 0200
  IF: eno1 state: down mac: <filter>
  Device-2: Intel Wi-Fi 6 AX200 driver: iwlwifi v: kernel bus-ID: 04:00.0
    chip-ID: 8086:2723 class-ID: 0280
  IF: wlp4s0 state: down mac: <filter>
  IF-ID-1: enp6s0f4u1u1 state: unknown speed: -1 duplex: half 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: Qualcomm MTS 8920FT type: USB driver: rndis_host v: kernel
    bus-ID: 5-1.1:4 chip-ID: 05c6:f00e class-ID: 0a00 serial: <filter>
  Report: This feature requires one of these tools: hciconfig/bt-adapter
  Device-2: Intel AX200 Bluetooth type: USB driver: btusb v: 0.8
    bus-ID: 5-3:3 chip-ID: 8087:0029 class-ID: e001
  Report: ID: hci0 rfk-id: 3 state: down bt-service: enabled,running
    rfk-block: hardware: no software: yes address: N/A
Logical:
  Message: No logical block device data found.
RAID:
  Message: No RAID data found.
Drives:
  Local Storage: total: 942.7 GiB used: 255.03 GiB (27.1%)
  SMART Message: Unable to run smartctl. Root privileges required.
  ID-1: /dev/nvme0n1 maj-min: 259:2 vendor: SK Hynix
    model: HFS512GD9TNI-L2A0B size: 476.94 GiB block-size: physical: 512 B
    logical: 512 B speed: 31.6 Gb/s lanes: 4 type: SSD serial: <filter>
    rev: 11010C10 temp: 34.9 C scheme: GPT
  ID-2: /dev/nvme1n1 maj-min: 259:0 vendor: Western Digital
    model: WDS500G2B0C-00PXH0 size: 465.76 GiB block-size: physical: 512 B
    logical: 512 B speed: 31.6 Gb/s lanes: 4 type: SSD serial: <filter>
    rev: 233010WD temp: 26.9 C scheme: GPT
  Message: No optical or floppy data found.
Partition:
  ID-1: / raw-size: 476.64 GiB size: 468.09 GiB (98.21%)
    used: 23.63 GiB (5.0%) fs: ext4 dev: /dev/nvme0n1p2 maj-min: 259:4
    label: N/A uuid: fd159167-2945-462b-8821-1e90ae3cf87b
  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: 259:3
    label: NO_LABEL uuid: 97BE-6A48
  ID-3: /run/media/miller/Second raw-size: 465.76 GiB
    size: 465.76 GiB (100.00%) used: 231.4 GiB (49.7%) fs: btrfs
    dev: /dev/nvme1n1p1 maj-min: 259:1 label: Second
    uuid: 07e71df0-6b9a-4c87-b190-3dddfcbe95c0
Swap:
  Alert: No swap data was found.
Unmounted:
  Message: No unmounted partitions found.
USB:
  Hub-1: 3-0:1 info: Hi-speed hub with single TT ports: 4 rev: 2.0
    speed: 480 Mb/s chip-ID: 1d6b:0002 class-ID: 0900
  Device-1: 3-3:2 info: IMC Networks Integrated Camera type: Video
    driver: uvcvideo interfaces: 2 rev: 2.0 speed: 480 Mb/s power: 500mA
    chip-ID: 13d3:56ff class-ID: 0e02
  Hub-2: 4-0:1 info: Super-speed hub ports: 2 rev: 3.1 speed: 10 Gb/s
    chip-ID: 1d6b:0003 class-ID: 0900
  Hub-3: 5-0:1 info: Hi-speed hub with single TT ports: 4 rev: 2.0
    speed: 480 Mb/s chip-ID: 1d6b:0002 class-ID: 0900
  Hub-4: 5-1:2 info: Genesys Logic Hub ports: 2 rev: 2.1 speed: 480 Mb/s
    chip-ID: 05e3:0610 class-ID: 0900
  Device-1: 5-1.1:4 info: Qualcomm MTS 8920FT type: Bluetooth,CDC-Data
    driver: rndis_host interfaces: 2 rev: 2.0 speed: 480 Mb/s power: 500mA
    chip-ID: 05c6:f00e class-ID: 0a00 serial: <filter>
  Device-2: 5-3:3 info: Intel AX200 Bluetooth type: Bluetooth driver: btusb
    interfaces: 2 rev: 2.0 speed: 12 Mb/s power: 100mA chip-ID: 8087:0029
    class-ID: e001
  Device-3: 5-4:5 info: Integrated Express ITE Device(8910) type: Keyboard
    driver: hid-generic,usbhid interfaces: 1 rev: 2.0 speed: 12 Mb/s
    power: 100mA chip-ID: 048d:c100 class-ID: 0301
  Hub-5: 6-0:1 info: Super-speed hub ports: 2 rev: 3.1 speed: 10 Gb/s
    chip-ID: 1d6b:0003 class-ID: 0900
  Hub-6: 6-1:2 info: Genesys Logic GL3523 Hub ports: 2 rev: 3.2
    speed: 5 Gb/s chip-ID: 05e3:0620 class-ID: 0900
Sensors:
  System Temperatures: cpu: N/A mobo: N/A gpu: amdgpu temp: 56.0 C
  Fan Speeds (RPM): N/A
Info:
  Processes: 375 Uptime: 1h 33m wakeups: 4 Init: systemd v: 250
  tool: systemctl Compilers: gcc: 11.1.0 clang: 13.0.1 Packages: pacman: 1271
  lib: 341 flatpak: 0 Shell: Zsh v: 5.8 default: Bash v: 5.1.16
  running-in: konsole inxi: 3.3.12

For what I recall, xbacklight only works with Intel GPU.

When using AMD or Nvidia one needs something different.

Try installing the package acpilight - add yourself to the group video and reboot.

sudo gpasswd -a $USER video
1 Like

did you ever changed the grub-config ? there is a workaround for lenovo. please read the links below carefully, but please ask before you change something that will cause pain. one solution is described here

but it differs from the solution here, because one is using intel_backlight but the other one uses acpi_video
https://wiki.archlinux.org/title/Lenovo_Legion_7i
how to edit kernel parameters is described here
https://wiki.archlinux.org/title/Kernel_parameters

please read carefully and if you feel firm to go on post back to prepare the next steps

hope this is helpful for you

P.S.: the tip of @linux-aarhus might be more actual. you can give it a try.

I did that and nothing has changed (at least it wasn`t visible to me).

I changed grub a while ago (deleted old Windows entry), but it was 2 distros before this.

And now I think we fixed it!

I used the method in your first link

1 Like

really ? please recheck

ls /sys/class/backlight/

is there a additional called acpi- whatever ?

Now it says
acpi_video0 acpi_video1 amdgpu_bl1 nvidia_0

okay so this was the trick to add the ordinary acpi (luckily) because acpi is working on your lenovo.

I am delighted to have fixed the problem in such a short time. I hope everything will work just fine from now on. Thank you for your help, Olli. And thanks to you too, linux-aarhus for your input. Should I mark my own post as a solution even though you posted the link to it in the first place, Olli?

Hi There !!
Sry for comin’ up late
Coincidentally We share the exact laptop even the model
and I had pulled the brightness issue on my laptop some days ago…
I run 60 Whr instead of 80… Can I ask you how is your battery life ?
You actually experienced this brightness issue a little late
Some update of Amd-ucode caused this issue like 1 month ago…
The only problem I felt was fully powering down Nvidia gpu
nvidia-smi
Test this in cmd… You will see the nvidia is powered on no matter what
However some folkes found the ways to power down nvidia for extra hour of life. Link here
I personally haven’t tested this cause I am happy with my 2 and half hour of 100 % to 30%.
I don’t recommend you this… Just enlightening you :smile: becuase the track to poweron the nvidia again is really nerve wrecking

Battery life is great for me when using this laptop as a torrent downloading machine with closed down lid without connecting to power adapter. Usually I get more than 4 hrs out of it. When watching high-quality videos through VLC on medium brightness I get about 3.5 hours, on max brightness about 2.5 hours, I haven`t checked specifically, of course, just an estimate.

About nvidia

| NVIDIA-SMI 510.47.03    Driver Version: 510.47.03    CUDA Version: 11.6     |
|-------------------------------+----------------------+----------------------+
| GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |
| Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |
|                               |                      |               MIG M. |
|===============================+======================+======================|
|   0  NVIDIA GeForce ...  Off  | 00000000:01:00.0 Off |                  N/A |
| N/A   34C    P8     1W /  N/A |      5MiB /  6144MiB |      0%      Default |
|                               |                      |                  N/A |
+-------------------------------+----------------------+----------------------+
                                                                               
+-----------------------------------------------------------------------------+
| Processes:                                                                  |
|  GPU   GI   CI        PID   Type   Process name                  GPU Memory |
|        ID   ID                                                   Usage      |
|=============================================================================|
|    0   N/A  N/A       748      G   /usr/lib/Xorg                       4MiB |
+-----------------------------------------------------------------------------+```
1 Like

@kanpeki can you please change the topic name to Lenovo Laptop specific such as
Laptop brightness issue in Lenovo Legion Laptop or Lenovo Laptop
It would be a easier search for those who are going to run across this issue in the future specially for Lenovo Laptop users


And just a tip: if you ever plan to use Lightdm manager you are likely to have lightdm crashing for once in every 20 boot…
Since you have an advanced system that boots in superfast mode, then lightdm and graphics drivers may run into race conditions. The lightdm service may start before the Kernel loads the graphics drivers. If this is the case, you may try to add the following lines in the /etc/lightdm/lightdm.conf file under [lightDM] section.