[Linux] Brightness slider does not work

[tapir]

Processor Information:
    Vendor:  GenuineIntel
    CPU Family:  0x6
    CPU Model:  0x3a
    CPU Stepping:  0x9
    CPU Type:  0x0
    Speed:  3300 Mhz
    4 logical processors
    2 physical processors
    HyperThreading:  Supported
    FCMOV:  Supported
    SSE2:  Supported
    SSE3:  Supported
    SSSE3:  Supported
    SSE4a:  Unsupported
    SSE41:  Supported
    SSE42:  Supported

Network Information:
    Network Speed:  

Operating System Version:
    "Arch Linux" (32 bit)
    Kernel Name:  Linux
    Kernel Version:  3.16.3-1-pae
    X Server Vendor:  The X.Org Foundation
    X Server Release:  11600000
    X Window Manager:  GNOME Shell
    Steam Runtime Version:  steam-runtime-release_2014-08-20

Video Card:
    Driver:  X.Org Gallium 0.4 on AMD PITCAIRN

    Driver Version:  3.0 Mesa 10.2.8
    OpenGL Version: 3.0
    Desktop Color Depth: 24 bits per pixel
    Monitor Refresh Rate: 60 Hz
    VendorID:  0x1002
    DeviceID:  0x6819
    Number of Monitors:  1
    Number of Logical Video Cards:  1
    Primary Display Resolution:  1920 x 1080
    Desktop Resolution: 1920 x 1080
    Primary Display Size: 18.78" x 10.55"  (21.54" diag)
                                            47.7cm x 26.8cm  (54.7cm diag)
    Primary VRAM Not Detected

Sound card:
    Audio device: Realtek ALC892

Memory:
    RAM:  16158 Mb

Miscellaneous:
    UI Language:  English
    LANG:  en_US.utf8
    Microphone:  Not set
    Total Hard Disk Space Available:  150101 Mb
    Largest Free Hard Disk Block:  100608 Mb

I can't change brightness in game

[theGeekPirate]

@drgnak, this is the intended behaviour (shown here: https://www.youtube.com/watch?v=QlMUcyBrsNc#t=557), and has nothing to do with this issue. Please remove your comment.

[davidw-valve]

On Linux the Brightness slider should show up as "DISABLED" due to it not being implemented. Is it not like this for you?

[theGeekPirate]

@davidw-valve, it is implemented and working for me.

EDIT: Make sure you're not running it windowed, because it will be disabled in that case.

[hadiskeini]

While the slider shows up as "DISABLED" in windowed mode, the brightness setting is still applied, so in my case the whole desktop gets brighter.

[Tele42]

Can someone please confirm this is still an issue since the 64 bit client update?

[angiolucci]

Hi, I'm with this very same issue, the brightness slider is enabled but never worked, even in full-screen mode. @Tele42: I'm running Steam client (32-bit) and CSGO (64bit) and this still an issue.

Most of users with this issue I've found on google (here and here) are AMD/Intel gpu owners, is it possible that it do not affect nvidia hardware?

Operating System Version: Linux (64 bit) Kernel Name: Linux Kernel Version: 4.5.7-202.fc23.x86_64 X Server Vendor: Fedora Project X Server Release: 11803000 X Window Manager: GNOME Shell Steam Runtime Version: steam-runtime-release_2016-02-23 Video Card: Driver: Intel Open Source Technology Center Mesa DRI Intel(R) HD Graphics 5500 (Broadwell GT2) Driver Version: 3.0 Mesa 12.1.0-devel (git-9827fc3) OpenGL Version: 3.0 Desktop Color Depth: 24 bits per pixel Monitor Refresh Rate: 59 Hz

[chiluk]

I'm hitting this as well on Ubuntu 16.10 with an Intel card on 4.8.0-34-generic

Temporary workaround $ xgamma -gamma 1.7

[chiluk]

I may be hitting issue #443 , as they use the same or similar driver.

[ToneyFoxxy]

Having this problem on Nvidia currently. Switching to Vulkan with the -vulkan launch option works for me, though that's not exactly a fix as using Vulkan has it's own bug that causes massive stuttering mid game

[ghost]

I am playing CSGO on Ubuntu 20.04 LTS, I switched color mode from computer monitor to television. It seems to work for me.