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-rc3 ** 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/1618075 Title: freeze on wake from suspend on 16.04, Dell Latitude e7470 Status in linux package in Ubuntu: Incomplete Bug description: On waking up from suspend, the display stays black. I cannot switch to the console, nor kill the x server. After a while the laptop reboots itself, or alternatively, I power it off. It does not happen on every suspend, but very often. I happens most of the times when the laptop was recently connected to the Dell dock, which connects to an external display via DVI and ethernet. My system is Ubuntu 16.04 with all updates, kernel Ubuntu 4.4.0-34.53-generic 4.4.15 on a Dell Latitude E7470. FDE is enabled, swap is on the encrypted partition. I've tried a 4.6 kernel from mainline-builds, that did not solve the problem. I'd be very grateful for any advise on what to do about this. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1618075/+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
