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Description of problem: By default, change brightness doesn't works at all. Manual option is launching the next: echo XX | sudo tee /sys/class/backlight/intel_backlight/brightness The same bug appears in other distribution, and the full solution in my case (Fn keys working) is creating the next file: /etc/X11/xorg.conf.d/20-intel.conf with the lines: Section "Device" Identifier "Intel Graphics" Driver "intel" Option "AccelMethod" "sna" Option "Backlight" "intel_backlight" EndSection Version-Release number of selected component (if applicable): How reproducible: Change brighness doesn't work at all, with that is solved, I added too sna accel method, unless uxa, I don't think that that line modify the solution. Steps to Reproduce: 1. 2. 3. Actual results: With that file it solves the situation. Seems that brightness control try to change "acpi_video0", I don't know if that happends with laptops/computers with more graphic card. Expected results: Working the solution Additional info:
Hi Toni, A lot has changed with backlight control since you've field this bug, specifically we default to not using acpi_video on newer (win8 ready) laptops now. Can you try with the latest f-20 kernel (3.17) ? Remove your custom /etc/X11/xorg.conf.d/20-intel.conf, "sudo yum update kernel", reboot, and then see if brightness still works. Thanks & Regards, Hans
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