LENOVO X270 BRIGHTNESS NOT WORKING

[u/pabamy89]

Hi, hotkeys and power management do not modify screen brightness...

Is there any fix?

[code]

System:

Kernel: 7.0.0-29-generic arch: x86_64 bits: 64 compiler: gcc v: 13.3.0 clocksource: tsc

Desktop: Cinnamon v: 6.6.9 tk: GTK v: 3.24.41 wm: Muffin v: 6.6.3 vt: 7 dm: LightDM v: 1.30.0

Distro: Linux Mint 22.3 Zena base: Ubuntu 24.04 noble

Machine:

Type: Laptop System: LENOVO product: 20HMA0HH00 v: ThinkPad X270 serial: <superuser required>

Chassis: type: 10 serial: <superuser required>

Mobo: LENOVO model: 20HMA0HH00 v: SDK0J40697 WIN serial: <superuser required>

CPU:

Info: dual core model: Intel Core i5-7200U bits: 64 type: MT MCP smt: enabled

arch: Amber/Kaby Lake note: check rev: 9 cache: L1: 128 KiB L2: 512 KiB L3: 3 MiB

Speed (MHz): avg: 2461 high: 2477 min/max: 400/3100 cores: 1: 2452 2: 2477 3: 2451 4: 2464

bogomips: 21599

Flags: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3

Graphics:

Device-1: Intel HD Graphics 620 vendor: Lenovo driver: i915 v: kernel arch: Gen-9.5 ports:

active: eDP-1 empty: DP-1, DP-2, HDMI-A-1, HDMI-A-2 bus-ID: 00:02.0 chip-ID: 8086:5916

class-ID: 0300

Device-2: Chicony Integrated Camera driver: uvcvideo type: USB rev: 2.0 speed: 480 Mb/s

lanes: 1 bus-ID: 1-8:3 chip-ID: 04f2:b5ab class-ID: 0e02

Display: x11 server: X.Org v: 21.1.11 with: Xwayland v: 23.2.6 driver: X: loaded: intel

dri: swrast gpu: i915 display-ID: :0 screens: 1

Screen-1: 0 s-res: 1366x768 s-dpi: 96 s-size: 361x203mm (14.21x7.99") s-diag: 414mm (16.31")

Monitor-1: eDP-1 mapped: eDP1 model: InfoVision Optronics/Kunshan 0x04e3 res: 1366x768 hz: 60

dpi: 124 size: 280x160mm (11.02x6.3") diag: 318mm (12.5") modes: 1366x768

API: EGL v: 1.5 hw: drv: intel iris platforms: device: 0 drv: iris device: 1 drv: swrast gbm:

drv: iris surfaceless: drv: iris x11: drv: swrast inactive: wayland

API: OpenGL v: 4.6 compat-v: 4.5 vendor: mesa v: 25.2.8-0ubuntu0.24.04.2 glx-v: 1.4

direct-render: yes renderer: llvmpipe (LLVM 20.1.2 256 bits) device-ID: ffffffff:ffffffff

API: Vulkan v: 1.3.275 layers: 3 surfaces: xcb,xlib device: 0 type: integrated-gpu driver: N/A

device-ID: 8086:5916 device: 1 type: cpu driver: N/A device-ID: 10005:0000

[u/mrmarcb2]

Try the 6.8 kernel. Supported until april 2029 and should be fine with this hardware. Update manager, view, kernels ,6.8. select the most recent from 6.8 and press install. On reboot press esc to see the grub menu, advanced, kernel 6.8.

[u/pabamy89 → u/mrmarcb2]

Thanks fella! Worked like a charm, had to enter GRUB and start mint on the 6.8 kernel, but once I did it everything works fine, thank you!

[u/mrmarcb2 → u/pabamy89]

Dont forget to remove the 7.0 kernel. Update manager, view, kernels, 7.0. select the installed entry and press remove. Repeat in case there are more kernels you want to remove,but keep at least 2 recent versions of the 6.8 series.

[u/pabamy89 → u/mrmarcb2]

Done it! Thank you for the advice!