Looks like a problem caused by the amdgpu driver. So first we need to see if the kernel part of the driver already has a fix for this. Please try installing a newer kernel like 5.8-rc5 or 5.7.9:
https://kernel.ubuntu.com/~kernel-ppa/mainline/?C=M;O=D ** Changed in: xserver-xorg-video-amdgpu (Ubuntu) Importance: Undecided => High ** Also affects: linux (Ubuntu) Importance: Undecided Status: New ** Changed in: linux (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-amdgpu in Ubuntu. https://bugs.launchpad.net/bugs/1887728 Title: [amdgpu] Scrumbled screen after standby on encrypted system To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1887728/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : [email protected] Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
