[Bug 1927774] [NEW] ACPI SB(screen brightness) Problem

[Diego Romero]

Public bug reported:

Linux jarvis 5.12.2-051202-generic #202105071130 SMP Fri May 7 11:33:24
UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

inxi -b

CPU: Quad Core Intel Core i5-8265U (-MT MCP-) 
speed/min/max: 800/400/3900 MHz Kernel: 5.12.2-051202-generic x86_64 Up: 38m 
Mem: 2683.8/7831.5 MiB (34.3%) Storage: 931.51 GiB (8.3% used) Procs: 288 
Shell: Bash inxi: 3.3.01 
diego at jarvis:~$ inxi -b
System:
  Host: jarvis Kernel: 5.12.2-051202-generic x86_64 bits: 64 
  Desktop: GNOME 3.38.4 Distro: Ubuntu 21.04 (Hirsute Hippo) 
Machine:
  Type: Laptop System: LENOVO product: 81S9 v: Lenovo IdeaPad S145-15IWL 
  serial: <superuser required> 
  Mobo: LENOVO model: LNVNB161216 v: SDK0J40679 WIN 
  serial: <superuser required> UEFI: LENOVO v: ASCN48WW date: 06/23/2020 
Battery:
  ID-1: BAT0 charge: 24.2 Wh condition: 24.2/30.0 Wh (81%) 
CPU:
  Info: Quad Core Intel Core i5-8265U [MT MCP] speed: 800 MHz 
  min/max: 400/3900 MHz 
Graphics:
  Device-1: Intel WhiskeyLake-U GT2 [UHD Graphics 620] driver: i915 
  v: kernel 
  Device-2: Chicony Integrated Camera type: USB driver: uvcvideo 
  Display: wayland server: X.Org 1.21.1.1 driver: loaded: modesetting 
  unloaded: fbdev,vesa resolution: 1366x768~60Hz 
  OpenGL: renderer: Mesa Intel UHD Graphics 620 (WHL GT2) 
  v: 4.6 Mesa 21.2.0-devel (git-fefd853 2021-05-07 hirsute-oibaf-ppa) 
Network:
  Device-1: Intel Dual Band Wireless-AC 3165 Plus Bluetooth driver: iwlwifi 
Drives:
  Local Storage: total: 931.51 GiB used: 77.17 GiB (8.3%) 
Info:
  Processes: 290 Uptime: 39m Memory: 7.65 GiB used: 2.86 GiB (37.4%) 
  Shell: Bash inxi: 3.3.01 


The problem is related to the ACPI in the loading of the operating system, I believe the problem is related to the brightness of the screen, because when the error started to appear my shortcut keys to decrease / increase the brightness of the screen stopped working.

** Affects: ubiquity (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: kernel-bug

** Attachment added: "IMG_20210507_114701.jpg"
   https://bugs.launchpad.net/bugs/1927774/+attachment/5495591/+files/IMG_20210507_114701.jpg

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https://bugs.launchpad.net/bugs/1927774

Title:
  ACPI SB(screen brightness) Problem

Status in ubiquity package in Ubuntu:
  New

Bug description:
  Linux jarvis 5.12.2-051202-generic #202105071130 SMP Fri May 7
  11:33:24 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

  inxi -b

  CPU: Quad Core Intel Core i5-8265U (-MT MCP-) 
  speed/min/max: 800/400/3900 MHz Kernel: 5.12.2-051202-generic x86_64 Up: 38m 
  Mem: 2683.8/7831.5 MiB (34.3%) Storage: 931.51 GiB (8.3% used) Procs: 288 
  Shell: Bash inxi: 3.3.01 
  diego at jarvis:~$ inxi -b
  System:
    Host: jarvis Kernel: 5.12.2-051202-generic x86_64 bits: 64 
    Desktop: GNOME 3.38.4 Distro: Ubuntu 21.04 (Hirsute Hippo) 
  Machine:
    Type: Laptop System: LENOVO product: 81S9 v: Lenovo IdeaPad S145-15IWL 
    serial: <superuser required> 
    Mobo: LENOVO model: LNVNB161216 v: SDK0J40679 WIN 
    serial: <superuser required> UEFI: LENOVO v: ASCN48WW date: 06/23/2020 
  Battery:
    ID-1: BAT0 charge: 24.2 Wh condition: 24.2/30.0 Wh (81%) 
  CPU:
    Info: Quad Core Intel Core i5-8265U [MT MCP] speed: 800 MHz 
    min/max: 400/3900 MHz 
  Graphics:
    Device-1: Intel WhiskeyLake-U GT2 [UHD Graphics 620] driver: i915 
    v: kernel 
    Device-2: Chicony Integrated Camera type: USB driver: uvcvideo 
    Display: wayland server: X.Org 1.21.1.1 driver: loaded: modesetting 
    unloaded: fbdev,vesa resolution: 1366x768~60Hz 
    OpenGL: renderer: Mesa Intel UHD Graphics 620 (WHL GT2) 
    v: 4.6 Mesa 21.2.0-devel (git-fefd853 2021-05-07 hirsute-oibaf-ppa) 
  Network:
    Device-1: Intel Dual Band Wireless-AC 3165 Plus Bluetooth driver: iwlwifi 
  Drives:
    Local Storage: total: 931.51 GiB used: 77.17 GiB (8.3%) 
  Info:
    Processes: 290 Uptime: 39m Memory: 7.65 GiB used: 2.86 GiB (37.4%) 
    Shell: Bash inxi: 3.3.01 

  
  The problem is related to the ACPI in the loading of the operating system, I believe the problem is related to the brightness of the screen, because when the error started to appear my shortcut keys to decrease / increase the brightness of the screen stopped working.

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