I've tested the kernel from http://at.archive.ubuntu.com/ubuntu bionic-proposed/main amd64 Packages linux-headers-4.15.0-55-generic Linux kernel headers for version 4.15.0 on 64 bit x86 SMP linux-image-4.15.0-55-generic Signed kernel image generic linux-modules-4.15.0-55-generic Linux kernel extra modules for version 4.15.0 on 64 bit x86 SMP linux-modules-extra-4.15.0-55-generic Linux kernel extra modules for version 4.15.0 on 64 bit x86 SMP and: NO flickering screen! So the problem seems to be solved!
I don't have a cosmic / disco installation, so I can't test these versions. So I set the verification-done-bionic - tag. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1791312 Title: ubuntu 18.04 flickering screen with Radeon X1600 To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1791312/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
