I got this: video/brightnessdown BRTDN 00000087 00000000 K Verify acpi commands with acpi_listen: acpi_listen. Get Fn F5/F6 working: sudo emacs /etc/default/grubĬhange the following: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=" sudo update-grub Resources: irq:50 memory:f7400000-f77fffff memory:d0000000-dfffffff ioport:f000(size=64)ĭisclaimer: I struggled with this on Mint/Mate-18 with my Asus 305CA, and got it to work, I do not know if it works on Ubuntu as well, but try. Product: 4th Gen Core Processor Integrated Graphics ControllerĬapabilities: msi pm vga_controller bus_master cap_list rom What other workarounds/solutions are there?Ĭapabilities: pm msi pciexpress bus_master cap_list GRUB_CMDLINE_LINUX="acpi_osi=linux acpi_backlight=vendor" GRUB_CMDLINE_LINUX="acpi_backlight=vendor" After editing /etc/default/grub file I rebooted. I tried each solution from this answer and its comments. If the problem persists after you’ve gone through all of the troubleshooting methods, reset your pc, Please make a backup of your personal files before resetting your computer.The brightness shortcuts via fn key don't work.
Continue to the next troubleshooting step if the problem persists after installing the driver. You may learn more about How to search for and download drivers by visiting this page. Download and install the ASUS System Control Interface driver from the ASUS support site. Select Uninstall after checking the box to Delete the driver software for this device. Right-click ASUS System Control Interface and select Uninstall device, then check the arrow next to System devices. Remove the ASUS System Control Interface drivers from your computer. In the Windows search bar, type and search, then click Open. Reinstall the control interface driver for ASUS system If the problem continues, please proceed to next step. Try resetting BIOS to default configuration. If the problem remains, proceed to the next step in the troubleshooting process. 
Replace the AC adapter and battery, and then turn on the computer to see if the problem has been repaired. To perform a hard reset, press and hold the Power Button for 40 seconds. Memory cards, CD/DVDs, dongles, and other external devices should all be removed. Reinstall the control interface driver for ASUS system. If the keyboard backlight does not turn on or the display is not working properly, please follow the troubleshooting procedures below:
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