Radeon mobility HD3450 (RV620) heavy screen flickering after trying to upgrade kernel 4.15.0-54
laptop Asus x50sl with graphic card AMD rv620 / Mobility Radeon HD3450.
Distro: Linux Mint 19.2 Tina base: Ubuntu 18.04 bionic.
This happens trying any distro. I tried Ubuntu, Manjaro, Debian, Deepin, MX and so on.
I'm stuck with Kernel 4.15.0-54 and 5.0.0-20. I cannot upgrade to newer kernels. Neither 5.3.x nor 5.6RC1.
Seems that the fixes for launchpad bug #1791312 broke my kind of card.
here is a video: https://youtu.be/9Rez7s0V6iA
here is another user with same problem: https://forums.linuxmint.com/viewtopic.php?p=1702005#p1702005