Recently yesterday at Friday, I got to try my laptop to run Linux and it worked. The brightness was controllable until I tried to reboot it. After rebooting, somehow during the start up I tried decreasing the brightness usign the keyboard, but then it did decrease but it instantly went to the lowest brghtness and then stayed there permentantly.
Here is the list of what I tried to troubleshoot the problem:
- Accessing the /etc/default/grub file via the terminal to change the editing permissions and changing GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" by adding acpi_background=video and acpi_bakcground=vendor to quiet splash and updating the file and rebooting did not work.
- Installng xbacklight and brightness controller did not work.
Are there any other ways of fixing this problem. I have an important assignment due in several days and can not work with low brightness. If any of you found a solution, reply this ASAP.