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I have both Windows 10 & Ubuntu 18.04.04 LTS installed on my Lenovo Legion Y740-15IRHg, with a dual boot setup. I also have Nvidia 440 driver installed.

Currently I'm having issue with controlling my brightness on Ubuntu. Here are a few approaches I tried and none of them worked out.

  1. Modifying /sys/class/backlight/intel_backlight/brightness directly
  2. Updating acpi_backlight argument in Grub's config GRUB_CMDLINE_LINUX_DEFAULT to vendor, video & native
  3. Using xbacklight

Anyone has any idea how to get this resolved? Thanks in advance.

Jeff Happily
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  • the are some tweaks you could try https://extensions.gnome.org/ – pierrely Feb 24 '20 at 04:48
  • gdbus call --session --dest org.gnome.SettingsDaemon.Power --object-path /org/gnome/SettingsDaemon/Power --method org.gnome.SettingsDaemon.Power.Screen.StepUp

    gdbus call --session --dest org.gnome.SettingsDaemon.Power --object-path /org/gnome/SettingsDaemon/Power --method org.gnome.SettingsDaemon.Power.Screen.StepDown

     – pierrely Feb 24 '20 at 04:50
  • @pierrely I don't really know what's the [extensions.gnome.org], but running the command directly gives me this – Jeff Happily Feb 25 '20 at 09:10
  • Error: GDBus.Error:org.freedesktop.DBus.Error.InvalidArgs: Type of message, '(ss)', does not match expected type '()' (According to introspection data, you need to pass no arguments)``` – Jeff Happily Feb 25 '20 at 09:11
  • https://askubuntu.com/questions/1029575/is-the-gnome-tweaks-package-in-software-the-same-as-installing-gnome-tweak-tools – pierrely Feb 28 '20 at 01:09

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