Hello i have a hp 15 laptop with a amd R3 cpu and radeon vega mobile graphic card. i running ubuntu 20.04 LTS. For some reason the screen will start to flash. it will go bright the dark.it did it a lot before i download the amd linux drivers. But now it seems to do it if you got a lot of windows open. I did install the amd linux driver for my video card. It still does it but not as much. It seems to do it if you change the WIFI settings. then it will flicker. To get it to stop you got to restart it and then everything is good for a while. I don't know if something is using the same memory address or what. I know the system memory is shared with the video card. I have 8gb in it and only 6.7GB available. Thanks for the help i get.