I have AMD Ryzen 2200g APU and people said that it was unstable before 4.15 update and 4.17 update kinda has all issues fixed.
So what is current kernel version installed on elementary os?
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After a fresh installation today, Juno appears to run Mainline Kernel 4.15.0-36.39. If you can at least boot into eOS Juno then you can actually run newer mainline kernels using UKUU (Ubuntu Kernel Update Utility). This utility has been a life saver for me because I have gotten plenty of brand new hardware that really only had good support in the newest kernel releases. If you would like to try it out then you can install UKUU on eOS Juno by running the following commands:
sudo apt install software-properties-common sudo apt-add-repository -y ppa:teejee2008/ppa sudo apt update sudo apt install ukuu