It sounds like the upstream 4.4 kernel does not have the bug per comments #10 and #12.
It appears this bug may be caused by a SAUCE patch that is not in the upstream kernel. To confirm that, can you test the upstream 4.4.44 kernel, which is what 4.4.0-64.85 is based on? If the bug does not exist in 4.4.44, we can perform a kernel bisect with the Ubuntu kernels to find that SAUCE commit that introduced this bug. -- 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/1646277 Title: Xenial server 16.04.x will have a black screen after PXE installation Status in debian-installer package in Ubuntu: Confirmed Status in linux package in Ubuntu: Confirmed Status in debian-installer source package in Xenial: Confirmed Status in linux source package in Xenial: Confirmed Bug description: The display will keep black screen after install 16.04.x via PXE(need use "Ctrl+Alt+F1" to change to terminal 1, then can see text mode screen) Quanta team is installing Xenial server using PXE boot. After the installation, the console will show a black screen. Hitting ctl- alt-f1 displays the text mode screen OK. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/debian-installer/+bug/1646277/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : email@example.com Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp