corrado@corrado-n3-gg-0826:~$ ls /sys/class/backlight/
intel_backlight
corrado@corrado-n3-gg-0826:~$ cd intel_backlight
bash: cd: intel_backlight: No such file or directory
corrado@corrado-n3-gg-0826:~$ cd /sys/class/backlight/
corrado@corrado-n3-gg-0826:/sys/class/backlight$ ls
intel_backlight
corrado@corrado-n3-gg-0826:/sys/class/backlight$ cd intel_backlight
corrado@corrado-n3-gg-0826:/sys/class/backlight/intel_backlight$ ls
actual_brightness bl_power brightness device max_brightness power scale
subsystem type uevent
corrado@corrado-n3-gg-0826:/sys/class/backlight/intel_backlight$ inxi -SCGx
System: Host: corrado-n3-gg-0826 Kernel: 5.4.0-42-generic x86_64 bits: 64
compiler: gcc v: 9.3.0 Desktop: N/A
Distro: Ubuntu 20.10 (Groovy Gorilla)
CPU: Info: Quad Core model: Intel Core i5-1035G1 bits: 64 type: MT MCP
arch: Ice Lake rev: 5 L2 cache: 6144 KiB
flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx
bogomips: 19046
Speed: 555 MHz min/max: 400/3600 MHz Core speeds (MHz): 1: 1029 2:
1851 3: 1482 4: 3015 5: 1953 6: 1549 7: 2231
8: 3061
Graphics: Device-1: Intel Iris Plus Graphics G1 vendor: Dell driver: i915 v:
kernel bus ID: 00:02.0
Device-2: Realtek Integrated_Webcam_HD type: USB driver: uvcvideo
bus ID: 1-6:3
Display: x11 server: X.Org 1.20.8 driver: modesetting unloaded:
fbdev,vesa resolution: 1920x1080~60Hz
OpenGL: renderer: Mesa Intel UHD Graphics (ICL GT1) v: 4.6 Mesa
20.1.5 direct render: Yes
corrado@corrado-n3-gg-0826:/sys/class/backlight/intel_backlight$
thanks, let me know if this info is sufficient
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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1893568
Title:
Screen brightness missing
Status in linux package in Ubuntu:
Incomplete
Bug description:
gnome-control-center - power - Screen brightness is missing.
also on top bar Screen brightness control appears but does nothing.
the problem does not happen on same PC, different partition with Ubuntu 20.04
ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: gnome-control-center 1:3.37.90-1ubuntu2
ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
Uname: Linux 5.4.0-42-generic x86_64
ApportVersion: 2.20.11-0ubuntu45
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Sun Aug 30 19:47:23 2020
ExecutablePath: /usr/bin/gnome-control-center
InstallationDate: Installed on 2020-08-28 (2 days ago)
InstallationMedia: Ubuntu 20.10 "Groovy Gorilla" - Alpha amd64 (20200826)
SourcePackage: gnome-control-center
UpgradeStatus: No upgrade log present (probably fresh install)
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