I'm afraid my case is different (drm:radeon_compute_pll_legacy). Perhaps, it's a matter of forcing a better modeline for the LCD, like here -- https://forums.gentoo.org/viewtopic-t-984216-start-0.html . Although mostly I observed the flickering as horizontal lines/line segments, 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.
I can try this if I get again to this machine. This seems to be noticable if there are several complex graphical windows like ownclowd-client (Qt), qupzilla (Qt), Firefox (gtk). -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1479136 Title: [ubuntu 14.04.2] Artefacts in radeon driver on kernel 3.16 and upwards Status in linux package in Ubuntu: Fix Committed Bug description: Ubuntu-Mate 14.04.2 This is what I get if I run a kernel newer than 3.13: https://www.youtube.com/watch?v=nx2-Fvihzxg sorry for the link, I just don't know how to describe these artefacts verbally. (a storm of small horizontal moving blips from right to left ??) Those artefacts appear as soon as new kernel is selected in GRUB, and remain during the whole session. The lastest kernel (from the main repository that is) working without artifacts is v3.13.0.59. All later kernels have artifacts. All later kernels also are either "-utopic" or "-vivid" instead of "-trusty", but I do not know if it is related. GPU: Mobility Radeon HD 3200 (RS780M) System: Ubuntu Mate 14.04.2 32-bit Kernels tested: 3.13.0.59 (and earlier) , 3.16.0.45 , 3.19.0.25 Only 3.13.0.59 (and earlier) are without problems. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1479136/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
