Brightness issue on Linux Ubuntu DDE (Deepin) - Nitro 5 - an515-43

I just had a many issues with screen brightness on my Nitro 5 (an515-43), and wanted to shared the solution (as I was almost sending the computer back for repair). Screen was not very bright, and I saw some reports pointing to screen hardware issues on Nitro 5. Luckly, I tried to dig deeper, and discovered that, somehow system brightness is not going to max (even when putting bar at 100%). My system is Ubuntu DDE (Deepin). To get max brightness, follow these steps:

### get screen id

$ xrandr | grep " connected" | cut -f1 -d " "
### in my case is eDP-1-0

### sets brightness to max

$ xrandr --output eDP-1-0 --brightness 1.0

### it doesn't change anything here

### gets brightness from amd drivers

cat /sys/class/backlight/amdgpu_bl0/brightness
### in my case is '20' (too low!)

### sets brightness to maximum

$ cat /sys/class/backlight/amdgpu_bl0/max_brightness | sudo tee /sys/class/backlight/amdgpu_bl0/brightness
### in my case is '255' (a good amount)

So, I just wanted to share this solution, for linux users that may have a similar problem in the future.

Regards!

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igormcoelho

Just another comment (for future users), this refers to Ubuntu 20.04 DDE.

ttttt

@igormcoelho

Good info. I liked the elegance of Deepin, but I hated the website for download. The download time for the distro could be up to 1-3 days with my slow internet, that was ridiculous. Even though my internet was slow at that time but usually could download other Linux distro in less than two hours. Didn't try Deepin again in the last 7-8 years.

Is the web site still slow?

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