Reasons to Turn On Adaptive Brightness on the Steam Deck AND, I’ll show you a nice controller shortcut that Valve has built into the Deck, which allows you to adjust the brightness in a middle of a game on-the-fly. If you agree with me, the next section shows you how to toggle adaptive brightness on or off on the Steam Deck. Underneath that, I’ll show you how to access and use the manual slider. Lastly, the brightness changes while you are playing the game and is distracting! Again, I might as well use the manual slider myself. There are times when the adaptive function adjusts the screen brightness too little or too much for my liking. If you need to change your Steam Deck brightness, you are better off using the manual slider (I’ll show you how to do that below) instead of waiting for adaptive brightness to kick in. Number one, adaptive brightness doesn’t respond quick enough. Well, there’s a few problems with the setting. After all, why use extra brightness and battery power if you are laying in bed in your dark bedroom? Steam promotes this as a way to save your battery. My former kde key bindings should now work as before.Adaptive brightness automatically adjusts your screen brightness to match the environment you are in. Now screen brightness control should work as before. GMUX_BL_BINARY="/usr/local/bin/custom-backlight-macbookpro_gmux"Įcho "Unknown argument, try bright -h for help"Įcho "Unknown error while processing options" INTEL_BL_BINARY="/usr/local/bin/custom-backlight-macbookpro_intel" NVIDIA_BL_BINARY="/usr/local/bin/custom-backlight-macbookpro_nvidia" So the file: custom-backlight-macbookpro_both LAST_BRIGHT_FILE="$ fiĪs I already did I also had to modify my main screen brightness script to use the three of the scripts I now have for screen brightness control. #reads content of brightness and save it into variableīRIGHTNESS_FILE="/sys/class/backlight/gmux_backlight/brightness" bright in your home directory and file last_bright in. #IMPORTANT: for proper work after reboot must exist directory. #IMPORTANT: you must have writing rights to /sys/./brightness (I must solute it with visudo or something like that.) # can take values 0-15, in real (my notebook) works only values 2-15 # Script for changing backlight brightness in /sys/class/backlight/acpi_video0/brightness The filename is going to be: /usr/local/bin/custom-backlight-macbookpro_gmux We will just reuse some code from older scripts and adapt it the new max brightness. Script for changing gmux backlight brightness ![]() Its maximum value is: 110400 which it’s also different from former values. Which it’s a new path different from the two scripts that I have. You only need to echo some value to: /sys/class/backlight/gmux_backlight/brightness Not after rebooting I was able to make the screen brightness to work. The optimal thing would be to add this extra parameter or not depending on Linux Kernel version but I think it’s not worth it. I just edited the file: /etc/modprobe.d/apple_bl.confĪnd commented the line just in case I wanted to enable back screen brightness control when booting from 3.2 kernel. You can find it explained in one of my former articles: Usar tarjeta intel integrada en Debian Unstable para MacBook Pro 6,2. So what I needed to do was to remove that use_gmux parametre. apple_bl: `1' invalid for parameter `use_gmux' This was the same error I had seen in dmesg around apple_bl line. So I decided to modprobe it but an error happened. At the end the module alias is: mbp_nvidia_bl I was put on the trail thanks to this apple_bl.c source code. Well, finally, it seems that the Linux 3.10 handles pretty well the apple backlight even discerning if it has to deal with the Nvidia Graphics card or with the Intel Graphics card. However the: /sys/class/backlight/acpi_video0/ I had already dealt with this settings when booting using Nvidia only and when booting with Intel in the Linux 3.2 days. ![]() One thing that didn’t work was screen brightness. Making Screen brightness to work in Linux 3.10Īs you might know I’m trying to make work my Mac Book Pro 6,2 with Linux 3.10.
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