I tested on 22 affected systems with a variety of Intel, NVidia and ATI/AMD chipsets.
On most systems I did three tests: 1- Connecting an external display. In this case the secondary display works fine, without any of the corruption and garbling that were reported previously. Exceptions are four systems with Intel Pineview/N10 graphics chipsets where the system starts performing sluggishly and has trouble refreshing the display with a secondary display plugged in. 2- Rotating (90 degrees to the right) the built-in display with an external display plugged in. The vast majority of systems worked OK in this case, with both displays showing correct, ungarbled video. Exceptions were a few NVidia systems without rotation support at all, and a couple of ATI/AMD systems where the built-in display is corrupted when rotating to the right but works fine when returning to normal orientation. 3- Rotating (90 degrees to the right) the external display. This worked OK in most cases, exceptions being NVidia systems without rotation support, and one Nvidia/nouveau system where the external display shows corruption when rotating. See this comment for a link to a spreadsheet detailing this and other tests I performed with this update. https://bugs.launchpad.net/ubuntu/+source/unity/+bug/753971/comments/62 So far Unity 3.8.16 seems to solve this problem generally, and the remaining problem cases *appear* to have another cause. I'll file bugs on those separately. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/795458 Title: Display garbled upon connecting external displays To manage notifications about this bug go to: https://bugs.launchpad.net/system76/+bug/795458/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
