Update Brightness Driver

[Ermelindo Klatt]

Icame back with one question. The driver indeed works just fine, but I have checked it on virustotal and it has one find. What do you think? Compared to the rest of drivers I have from hp also the signature and app icon looks a little bit different. Should I worry?

My laptop is ASUS K501UX and when i Updated my driver to latest version [ 15.65.4.4944 ] The (fn Brightness Key) disabled suddenly but other fn keys working correctly. before this update everything is OK and Brightness key worked correctly.

While the brightness controls are added by ASUS, the software brightness controls within the Windows 10 Action Center also do not work, and thus the problem does not lie with the implementation of the physical brightness controls. This appears to be an issue with Windows 10. I don't believe it is strictly an issue with Intel drivers as there are some websites recommending to update nVidia or AMD drivers. I realize this is an old post ... just wanted to advise regarding the software controls not working either.

It's not problem with asus ATK, I have removed asus ATK but brightness control work fine with old intel drivers(without Asus Hotkeys), I think hotkey for britghtnes work using Windows 10 and not ATK. So I think problem with Intel Drivers or Windows 10 1803. I tried to install new drivers(24.20.100.6094) but it's not help.

Generic drivers v4901 were working fine but since Windows 10 april update, they aren't working anymore. I was forced to update to a generic driver because Clevo didn't update them on their website. It's pretty annoying.

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This bug seems to had make a comeback since driver 475, where brightness could not be changed and was stuck on a low value. Now, the opposite occurs, where brightness is stuck on a high value instead.

Backlight issues frequently are specific to particular notebook system designs: @BertRAMAerts @Moody.Liu could you please provide detailed information about what notebook systems you are observing these symptoms on?

Prior to that, I was able to set brightness by calling xbacklight and also having set EnableBrightnessControl=1 and "Option "Backlight" "acpi_video0" in xorg.conf. See the output of nvidia-bug-report.sh attached.

I recently installed Ubuntu 11.10 on my Mac Book Pro 7,1. I installed the NVIDIA driver (285). The brightness keys are working (F1 and F2) and I get the box showing the brightness but it does nothing. I can change the brightness in the NVIDIA X Server Settings application. How can I get the brightness working without uninstalling the driver? Thanks in advance.

These days X automatically configures itself, so creating an xorg.conf file might make your system inflexible. Instead you can add a section to a file in /usr/share/X11/xorg.conf.d/ and X will include that section in the configuration that it automatically generates.

You need to enable Brightness Control.Open terminal and type sudo gedit /etc/x11/xorg.confAnd then add Option "RegistryDwords" "EnableBrightnessControl=1" inside the device section, paste it in a new line.Then restart your computer and everything should be fine.

Thank you for providing the great script qgj. It's sad that this bug still persists and the work-around is needed. I had the same issue as James getting an error due to the options no longer being valid with nvidia-settings for my specific display type. As luck would have it, there is a better setting available for backlight brightness. I have modified the bash script to use this setting instead.

There are some computers, such as my Lenovo W520, that don't with the Option "RegistryDwords" "EnableBrightnessControl=1" line. If you are one of those unlucky ones, you can try the nvidiabl driver (link here).

The nvidiabl driver provides a proper way to change the screen brightness. On some laptops the Option "RegistryDwords" "EnableBrightnessControl=1" hack will cause the backlight controller or your GPU to emit a high pitched noise.

Im personally using Vaio VPCCW21FX (Nvidia Graphic) and Ubuntu Studio 11.10 ..I tried many solutions and nothing could resolve my problem with LCD brightness!Finally wrote these two perl files to manually set brightness/Contrast and Gamma functions inside Nvidia driver config file.

Thats it! now place these files in unique folder.. you have to bind your Function Keys to these two perl file.you can use Compiz>commands to do that.Run below command to install the compizconfig-settings-manager

The above perl script didnt work for me so I wrote my own script as a bash script (since I don't know perl). It got a bit long but it creates the settings file by itself and can be used with command line options to adjust brightness or gamma or both at the same time. I use it with the --brightness-up and --brightness-down switches for the brightness keys on my Keyboard. Easy to assign in XFCE4 and surely also in KDE / GNOME.

The other answers are good steps to try, but note that some combinations of Ubuntu/Linux Kernel and the Nvidia driver just won't work. I used 12.04 for years, and even though I tried all the above answers, I couldn't get any of the Nvidia drivers to support screen dimming on my Macbook Pro 5,5.

When I finally upgraded to 14.04, I tried the Nouveau driver, which did support screen dimming, and was generally faster and more reliable and Nvidia. Unfortunately, it doesn't support suspend/resume, making it useless on a laptop. I switched back to Nvidia, but several drivers caused X/lightdm to crash, preventing me from even logging in. I finally found that the Nvidia 340 driver was stable with my Macbook Pro 5,5 and Ubuntu 14.04 and also supported dimming.

Solved! Many of NVIDIA's video drivers on Linux have regressions, breaking screen brightness control in later driver versions, so you should install the latest NVIDIA driver first, and then if your screen brightness control doesn't automatically work after rebooting (without any of the other fixes on this page), then progressively install older and older NVIDIA driver versions straight from the manufacturer until one naturally works with your screen brightness control function buttons.

Your BIOS/UEFI probably supports (it should) setting your graphics mode between "Hybrid Graphics" and "Discrete Graphics". NVIDIA says you must use "Discrete Graphics" mode to be compatible with their driver. However, if you set your mode to "Hybrid Graphics", it does make your brightness buttons work again because then your internal graphics card built into the CPU will handle that, but then again your NVIDIA graphics driver will also be glitchy and you may notice problems, and NVIDIA says to use "Discrete" mode.

Some designs incorporating supported GPUs may not be compatible with the NVIDIA Linux driver: in particular, notebook and all-in-one desktop designs with switchable (hybrid) or Optimus graphics will not work if means to disable the integrated graphics in hardware are not available.

So, the solution is to follow Option 2 in my detailed NVIDIA graphics driver installation instructions here: How to install the proper NVIDIA graphics driver to hopefully prevent freezes.

Start by installing the latest NVIDIA driver for your graphics card. Then, reboot, log in, and try your brightness function keys. If they work, you're done! If they don't, go to the NVIDIA "Advanced Driver Search" page and install the next-oldest driver down the list in your driver version series, possibly skipping "Beta" and "NFB" (whatever that means) versions, until one works.

So, to make the point and demonstrate the order in which I'd try the drivers, if I was doing this based on the driver list in the image just above, I'd try the driver versions in this order (probably sticking to the later 500 series versions unless they all failed to work too):

I do not recommend just using an older version to start, as it's super easy and fast (Solution

Use Disk Startup creatorBetter Try Reinstalling the ubuntu by creating fresh bootable usb using another ubuntu system's utility Disk Startup creator application which is already provided in every ubuntu now days.

I have an old Macbook 6,1 that I installed Ubuntu 18.04 on, and enabled the nvidia driver. To get the brightness controls working again, as various suggestions in this thread mention, I added the following line:

This is an old post but it kept coming up any time I searched about this same problem. I solved the issue by installing xbacklight but I wanted to make the solution more integrated by attaching it to my startup and hotkeys so I could easily adjust the brightness any time.

I used the following script, call it from my startup app list and also call "brightness up" and "brightness down" from hotkeys configured in the keyboard shortcut tool. (or directly on the command line). Just put the script in a reasonable place and make it executable. Then you can start using it. It will try to install xbacklight for you if you don't already have it installed.

I agree it looks strange. And it is strange that this option exists in the first place. Why would anyone not want brightness control?

But this is traditional xorg.conf syntax and it was definitively required and working in a previous opensuse version.

Anyways, any hint welcome!

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