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 Bugs, which is subscribed to 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 -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
