Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?
Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.8 kernel[0]. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.8 ** Changed in: linux (Ubuntu) Importance: Undecided => Medium -- 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/1629917 Title: When using external monitor displays become unstable Status in linux package in Ubuntu: Incomplete Bug description: I am using a HP Pavilion dv6 with ATI Mobility Radeon HD 5650 Graphics. After upgrading to ubuntu 16.04 LTS using Gallium 0.4 on AMD REDWOOD (DRM 2.43.0, LLVM 3.8.0). I get an unstable display when I plug in my external display through the VGA port. The system keeps cycling through the display options using only one display, then both then extended and then the other display. This happens every 10-15 seconds. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1629917/+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
