How can I adjust brightness in Windows 10?.How do I adjust brightness in Linux Mint?.How do I turn on Fn key for brightness?.Why is my brightness button not working HP?.How do I adjust brightness on Linux Mint 20?.What to do if brightness is not working?.How do I change the brightness in Ubuntu terminal?.Why my brightness button is not working?.Step 2: Fix brightness control issue with Intel card in Ubuntu and Linux Mint:.Run the command below in the terminal to know what video card is used for the backlight/brightness: ls /sys/class/backlight/. Step 1: Find video/graphics card in Ubuntu and Linux Mint.If you know which version of Windows your Legion 5 was built for, you may be able to get further along the troubleshooting path than I did using trial-and-error.Fix Brightness Control Not Working for Ubuntu & Linux Mint One other resource that may help, but I haven’t investigated yet, is in the Manjaro article ACPI Kernel Parameters and how to choose them. Troubleshooting this is a bear because the issues almost always seem to arise at the GRUB/ kernel module level. So this is a lot of hoops to jump through but I was able to get my F5/F6 keys working. ModulePath “/usr/lib/x86_64-linux-gnu/nvidia/xorg” Option “RegistryDwords” “EnableBrightnessControl=1 ”
To enable kbd brightness, edit /usr/share/X11//nf: On Arch-based, you need to add hooks for when you rebuild the kernel.ĭescription=Update Nvidia module in initcpioĮxec=/bin/sh -c ‘while read -r trg do case $trg in linux) exit 0 esac done /usr/bin/mkinitcpio -P’ Notice that 's edit is missing the nvidia_uvm module. MODULES="nvidia nvidia_modeset nvidia_uvm nvidia_drm" Run update-grub for Debian systems, grub-mkconfig -o /boot/grub/grub.cfg for Arch systems This allows the system to generate the nvidia_0 backlight class.
All this is done using sudo or other account with root privileges. I eventually switched to Arch Linux (EndeavourOS) as I could get better troubleshooting info.Īfter hours of systematic trial-and-error, and hours of frustration, I was able to make the following work. The F5/F6 keys worked in Linux Mint using EnableBrightnessControl=1 but getting there was a struggle, having to boot into compatibility mode first with the Nouveau drivers, then installing NVIDIA, then rebooting, then messing with the nf file.Using acpi_video=ideapad in GRUB resulted in a hang at boot time no further troubleshooting was possible. The Legion Y540 was an up-spec’d Ideapad I found this after booting GRUB with the acpi_video=vendor option, which resulted in /sys/class/backlight/ideapad.The Legion series was spec’d for primarily Windows gaming and so most likely will not receive any Linux support from Lenovo.Couple things I’ve found while troubleshooting. It’s model 15IRH, has only RTX 2060 Ti graphics (no hybrid in BIOS possible). I have a Lenovo Legion Y540 which is a precursor to the Legion 5. Thank to everyone who will spend their time on this! If you have the same problem of mine hit like so developers may see this is a shared problem. If needed, I can attach a nvidia-bug-report.log. I don’t really know what to do know and I cannot find any other solution on the web, I hope if someone of you can help me fixing this problem. Tried dynamical mode but screen froze after login.I added “RegistryDwords” “EnableBrightnessControl=1” to /usr/share/X11//nf.I added acpi_backlight=video/none/… acpi_osi=linux to /etc/default/grub.I’ve tried many soultions found on this forum, on, and so on… to name a few: I have a dual boot with Windows and there everything works fine. With F5/F6 buttons I can change the brightness bar, but brightness is not actually changing (also battery is running low very fast). Hi everyone! I have a problem that is driving me crazy these days.
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