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On Sony Vaio E15136CN (and most others with an AMD Graphic Card), acpi_video0 is not present. Instead, there is radeon_bl0 in /sys/class/backlight. So the statement to be added to rc.local file is echo 60 > /sys/class/backlight/radeon_bl0/brightness Replace 60 with whatever value is suitable to you. My brightness range is 0 to 255 (you can check your ...


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Ok, I think I found it. Edit your /etc/default/grub file: sudo nano /etc/default/grub Change the following line: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" to say this instead: GRUB_CMDLINE_LINUX_DEFAULT="acpi_osi=! acpi_backlight=native idle=nomwait quiet splash" Press CTRL + o and then press ENTER to save the file. Press CTRL + x to exit nano. ...


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What you need to do Install xprintidle, to keep track of the current idle time (defined by lack of keyboard- and mouse events). Create a small background script (further below); copy the script into an empty file and save it as dim_keyboard.sh. Make the script executable and copy it to a location where unauthorized users cannot alter the script (e.g. ...


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you can try the command line sleep 0.2s && xset dpms force off and press enter to have it display again. you can write it into a script and put just have it launch from a desktop icon then you can click the icon and your screen will turn off then move your mouse/trackpad or press enter and your screen will display again.


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Looking up on this very site has brought me to this question and the solution mentioned there was: Open a terminal (Program - Accessories - Terminal) Type in "sudo gedit /etc/default/grub" (without the "") Find the line that says: GRUB_CMDLINE_LINUX="quiet splash" Edit it so it says: GRUB_CMDLINE_LINUX="quiet splash acpi_backlight=vendor" Save ...



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