4.1.0-040100-generic works 4.4.14-040414-generic works Didn't test others.
The boot sequence is different with the main line kernels. There is a black screen period with a couple of messages (1-2s), then the console font load, then it briefly switches to the splash, black screen flash back to the prior screen then the login prompt. There is no DPMS flash (the monitor displays a dialog for 1s when it is DPMS powered off) Whereas when, say, 4.2-ubuntu rarely randomly works, or with 3.19-ubuntu, it just stays at a black screen, briefly flashes a DPMS power off notification, and then goes to the login screen without showing the couple of messages. Sounds like an Ubuntu kernel bug? Obnoxiously all the console messages are not captured in the journal, that seems like another bug.. On Tue, Jul 19, 2016 at 1:21 PM, Joseph Salisbury < joseph.salisb...@canonical.com> wrote: > Would it be possible to test the upstream stable 4.0 and 4.1 kernels? > They can be downloaded from: > > 4.0: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.0-vivid/ > 4.1: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.1-wily/ > > We can perform a kernel bisect once we identify the last good and first > bad kernel versions. > > -- > You received this bug notification because you are subscribed to the bug > report. > https://bugs.launchpad.net/bugs/1603810 > > Title: > Ubuntu turns monitor permanently off during boot > > To manage notifications about this bug go to: > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1603810/+subscriptions > -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1603810 Title: Ubuntu turns monitor permanently off during boot To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1603810/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
