Brightness Flashes Randomly

Support & Help Requests Hardware
#1

Hello, I have quite some time using Ubuntu Mate, Recently I got a Dell Inspiron 3493 with a Intel UHD 620 intagrated graphics and a Core i3 Intel Processor 1001-G1, I'm currently facing a problem, when I'm using my laptop for regular basis suddenly it looks like the brightness reset itself, seems like suddenly goes brighter to a 100% and then goes back to the normal percentage I usually use it a 15% of brightness similar when you take an screenshot, honestly I tried ignoring the issue and it is annoying. I already disable the PSR option from the kernel and remove the intel graphics for x11, also disable the automatic brightness option using dconf-editor and still, keeps happening every 25 to 30 minutes, I would like to request help and if you need me to attach something please ping me I'll be checking this thread.

Thanks in advance

#2

Hi and welcome to the Ubuntu MATE Community !

Does your problem occur on battery as well as while charging ?
Have you unticked «reduce brightness when idle» or something like that in the Power Manager in both tabs ?

What kernel version are you using ? Your laptop is quite new and support can be tricky with the latest hardware. Have you tried updating the kernel to a newer one than 5.8 ? Current is 5.10.11 and 5.11 should be coming soon as it's already in RC5.
You can effortlessly update to the latest kernel using the mainline utility, available in a PPA.
Should you want to install it:

sudo add-apt-repository ppa:cappelikan/ppa
sudo apt update
sudo apt install mainline
#3

Hi, thanks for the answer.

The problem occurs on battery and as well while is charging

I checked and is unticked for both tabs in the Power Manager tool

My kernel version is 5.4.0-65-generic, I'll follow thw steps above to update it and post what happends after a couple of days of usage.