** Description changed: + === SRU Justification === + [Impact] + Screen flickers when using radeon.ko. + It's a regression, it didn't happen on Trusty. + + [Fix] + Quote the original commit log: + "Instead of the closest reference divider prefer the lowest". + + [Test] + Affected user confirms it fixes the issue. + + [Regression Potential] + Low. Only affect radeaon, and it's in upstream stable tree. + + === Original Bug Report === my laptop: HP Compaq nx9420 - my grafic card: + my grafic card: 01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV530/M56-P [Mobility Radeon X1600] (prog-if 00 [VGA controller]) attachment: the bug-apport-file Description: I start ubuntu 18.04 LTS (Kernel 4.15.0.33) in textmode; -> as soon as the kernel-module radeon.ko is loaded the screen starts flickering when starting the grafic-mode the flickering continues; so the screen is unusable. when setting the option "radeon.modeset=0" (thus: not use radeon drivers) the screen does not flicker but the resolution is limited to 1400x1050 (instead of natural 1680x1050) so I can not use this as work-around when using the old ubuntu 14.04.05 LTS (Kernel 3.13.0-157) - the screen is o.k. NO flickering in textmode, nice grafic, NO flickering + the screen is o.k. NO flickering in textmode, nice grafic, NO flickering xrandr tells: 1680x1050 60.1 so I must stay on old ubuntu 14.04.05 ???
-- 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
