Answer by Aissa Rouk for Ubuntu 20.04 brightness adjust not working
Here's what worked for me:1º Go into the menu and click in "Software and Updates" app and go in additional drivers. It should look like this.Software and Updates -> Additional Drivers2º From all the...
View ArticleAnswer by Kristijonas Šaknys for Ubuntu 20.04 brightness adjust not working
I have a similar problem on Ubuntu 22 (brightness slider doesn't change anything) and tried the proposed solution without success. So I tried to change acpi_backlight=video instead...
View ArticleAnswer by Madhukaran for Ubuntu 20.04 brightness adjust not working
goto ls /sys/class/backlight/ and move to the respective folder based on vga and graphics driver.change the value of /sys/class/backlight/intel_backlight/brightness to the level between 60000 -...
View ArticleAnswer by Magsad Novruzov for Ubuntu 20.04 brightness adjust not working
You shouldn't install anything. Just do the following changes in /etc/default/grub:GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"GRUB_CMDLINE_LINUX=""Then run:sudo update-grub && reboot
View ArticleAnswer by AlexBV117 for Ubuntu 20.04 brightness adjust not working
Hi new to this particular forum so don't yet have enough reputation to just leave a comment. However, adding to Renato Miotto's answer to this issue using xrandr as it fixed the problem for me. Here...
View ArticleAnswer by M Suzon for Ubuntu 20.04 brightness adjust not working
Open the grub file from the directory /etc/default or run the command:gedit /etc/default/grubin a terminal.Edit the following line from:GRUB_CMDLINE_LINUX_DEFAULT="quiet...
View ArticleAnswer by Eyup for Ubuntu 20.04 brightness adjust not working
Open a terminal with Ctrl+Alt+T.Open the file /etc/default/grub from the terminal:sudo gedit /etc/default/grubUpdate the following line from:GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"...
View ArticleAnswer by iqbalhossain raju for Ubuntu 20.04 brightness adjust not working
I had the same issue. I followed the answers above but couldn't fix the issue. But updating the package index and then upgrading the packages solved the issue in my case. Commands:sudo apt updatesudo...
View ArticleAnswer by Prabhat Choudhary for Ubuntu 20.04 brightness adjust not working
I did not want to install any third party software to control brightness. All the native fixes that are mentioned here, did not work for me. Things that I tried:Modified and updated GRUB file on...
View ArticleAnswer by user1558013 for Ubuntu 20.04 brightness adjust not working
For me updating GRUB to:GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor acpi_osi=linux"and installing brightness-controller worked on a Lenovo Thinkpad E14.
View ArticleAnswer by Dipen Chauhan for Ubuntu 20.04 brightness adjust not working
I have a Lenovo Ideapad Gaming laptop with nVidia 1650 Graphics Card. None of the above solutions worked for me. This is how I was able to get the brightness to work:sudo add-apt-repository...
View ArticleAnswer by Piotr Kochański for Ubuntu 20.04 brightness adjust not working
For a Lenovo Legion 5 with AMD Ryzen and Nvidia 1060Ti on Ubuntu 21.04 I tried multiple fixes listed by others in this thread (adding EnableBrightnessControl=1 in xorg.conf, updating kernel - yes, I...
View ArticleAnswer by Mi-La for Ubuntu 20.04 brightness adjust not working
I had much easier solution. Somehow unintentionally I've disabled "Handle display brightness keys" option in Xfce Power Manager. When pressing the brightness keys, the notification popup was displayed...
View ArticleAnswer by Ta Tchou for Ubuntu 20.04 brightness adjust not working
On Lubuntu 20.04 there's a simple shortcut : Ctrl+Shift+F6 or Ctrl+Shift+F7 to increase or decrease brightness.
View ArticleAnswer by coderLMN for Ubuntu 20.04 brightness adjust not working
I had the same problem, which was solved following this post: How to Fix Brightness Keys Not Working in Ubuntu. The solution is quite simple:Edit file /etc/default/grub and...
View ArticleAnswer by HPrat for Ubuntu 20.04 brightness adjust not working
I had the same issue, in my case all answers I found not working.Maybe my case is specific, but I hope my answer can help someone.My computer is a Lenovo Legion Y740-15I with a nvidia GeForce RTX...
View ArticleAnswer by mak for Ubuntu 20.04 brightness adjust not working
For me, the problem was solved by simply rebuilding the initrd another time after booting into the new kernel:sudo dpkg-reconfigure linux-image-5.4.0-54-genericObviously, you should run this with the...
View ArticleAnswer by Geon-Hong Kim for Ubuntu 20.04 brightness adjust not working
In my case, I resolved this problem by upgrading the kernel version from 5.4 to 5.6. Run:sudo apt-cache search linux-image-5This will return the list of available kernels.I installed...
View ArticleAnswer by Elliott for Ubuntu 20.04 brightness adjust not working
If you're having problems on 20.04 and you've upgraded from an earlier version where you tweaked with the grub file, try changing the grub file back to the original:GRUB_CMDLINE_LINUX_DEFAULT="quiet...
View ArticleAnswer by apolinux for Ubuntu 20.04 brightness adjust not working
The xrandr solution didn't worked for me. I have installed brighness-controller and worked well.sudo add-apt-repository ppa:apandada1/brightness-controllersudo apt updatesudo apt install...
View ArticleAnswer by Renato Miotto for Ubuntu 20.04 brightness adjust not working
I am having similar issue. There is no screen brightness slider on system menu (the one below the volume). I know that there is a workaround using xrandr that goes like this:xrandr -q | grep "...
View ArticleAnswer by Giorgos Saridakis for Ubuntu 20.04 brightness adjust not working
Yes, this has been answered in the past. And it was the method I used in 18.04, before upgrading.Brightness problem Ubuntu 18.04 LTS
View ArticleUbuntu 20.04 brightness adjust not working
I am unable to adjust brightness levels through Gnome. I had the same issue with 18.04 but it was resolved there (honestly, I can't remember how).lspci|grep VGA00:02.0 VGA compatible controller: Intel...
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