I tried the glamor / tearfree - advice, but: with NO success; still flickering. And, btw.: I don't think the flickering is an Xorg-issue; it starts in "textmode" (!!) as soon as the radeon-kernel-driver loads. I think the kernel-driver does NOT read Xorg-configurations.
Just for fun, I've tested different systems: System kernel radeon.ko result UBUNTU-14.04.5 3.13.0-164 2.36.0 O.K puppy_slacko-6.3.2 3.14.55 2.37.0 O.K. UBCD 3.16.0 2.39.0 FLICKER UBUNTU 14.04.5 4.4.0-133 2.43.0 FLICKER UBUNTU 18.04.1 4.15.0-42 2.50.0 FLICKER So, I think the problem starts with a modification made in radeon.ko version 2.37.0 --> 2.39.0 Additionally I found a "kind of work-around": switch the mode several times! thus: - ignore flickering; start grafic mode - xrandr --output LVDS --mode 1440x900; sleep 2; xrandr --output LVDS --mode 1680x1050; - try that 2 ... 5 times until flickering stops! -- 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/ubuntu/+source/linux/+bug/1791312/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
