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Public bug reported:

In this notebook i cannot regulate brightness by hotkeys and by ''System  settings'' menu by default.
Parameter:
GRUB_CMDLINE_LINUX="acpi=off"
shut down WiFi and modem.
Parameter:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux acpi_backlight=vendor"
works (but monitor doesn't display a pop-up message with scale).

https://bugzilla.kernel.org/show_bug.cgi?id=62941

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

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https://bugs.launchpad.net/bugs/1242292

Title:
  Backlight control keys doesn't work with Acer Aspire 5733Z-P623G32Mikk

Status in “linux” package in Ubuntu:
  New

Bug description:
  In this notebook i cannot regulate brightness by hotkeys and by ''System  settings'' menu by default.
  Parameter:
  GRUB_CMDLINE_LINUX="acpi=off"
  shut down WiFi and modem.
  Parameter:
  GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux acpi_backlight=vendor"
  works (but monitor doesn't display a pop-up message with scale).

  https://bugzilla.kernel.org/show_bug.cgi?id=62941

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