[Bug 1881461] Re: Brightness settings don't work on Lenovo Ideapad 5 15ARE05

Sun May 31 08:05:35 UTC 2020

** Package changed: ubuntu => ubiquity (Ubuntu)

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https://bugs.launchpad.net/bugs/1881461

Title:
  Brightness settings don't work on Lenovo Ideapad 5 15ARE05

Status in ubiquity package in Ubuntu:
  New

Bug description:
  After installation, the notebook brighness buttons change brightness
  settings, but settings are not applied on the screen.

  Failed to start Load/Save Screen Backlight Brightness of backlight:amdgpu_bl0.
  amdgpu_bl0: Failed to write system 'brightness' attribute: No such device or address
  amdgpu_bl0: Failed to write system 'brightness' attribute: No such device or address
  Failed to get backlight or LED device 'backlight:acpi_video0': No such device

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubiquity (not installed)
  ProcVersionSignature: Ubuntu 5.4.0-33.37-generic 5.4.34
  Uname: Linux 5.4.0-33-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.2
  Architecture: amd64
  CasperMD5CheckResult: skip
  CurrentDesktop: X-Cinnamon
  Date: Sun May 31 09:04:49 2020
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
  InstallationDate: Installed on 2020-05-29 (1 days ago)
  InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
  ProcEnviron:
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubiquity
  Symptom: installation
  UpgradeStatus: No upgrade log present (probably fresh install)

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