As a clarification, the mainline boot behaviour is identical to the Ubuntu kernel with $vt_handoff removed. I double checked that the option is present in grub for all the tests. I guess this isn't surprising since that option isn't part of mainline.
Jason On Wed, Jul 20, 2016 at 8:30 PM, Jason Gunthorpe <jguntho...@gmail.com> wrote: > 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
