I wonder if this is the same bug which I am seeing on my Dell Inspiron 6400 laptop with Radeon X1400 video. Occasionally I get white lines which are very similar to the https://www.youtube.com/watch?v=nx2-Fvihzxg video posted at the beginning. The only difference is that more lines are present at screen edges and high contrast borders. Line length and the way they flicker is very similar.
This problem has been present over multiple Ubuntu versions, and is still present in 64-bit Ubuntu 16.10 with kernel 4.8.0-26-generic. In the past I posted about the problem at: https://ubuntuforums.org/showthread.php?t=2322535 Sometimes I've gotten worse corruption like how Ivan Zakharyaschev (imz) wrote "sometimes the flickering did appear as some regions (with text) displayed at another place on the screen appearing extremely quickly and transparently also at a wrong places at the top." This is more rare than the white lines, and has not happened in Ubuntu 16.10 yet. Changing video modes can start or stop corruption. So, if I have corruption, run a script which uses xrandr to change to a lower resolution and back to the native resolution. This usually works in one try but sometimes takes a few tries. The problem happens rarely enough that it's not a big deal, but a fix would be nice. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1479136 Title: [ubuntu 14.04.2] Artefacts in radeon driver on kernel 3.16 and upwards To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1479136/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
