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 <[email protected]> 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 < > [email protected]> 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 Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1603810 Title: Ubuntu turns monitor permanently off during boot Status in linux package in Ubuntu: Confirmed Bug description: This is a regression, at least trusty (and prior) worked fine on this hardware. Booting the Xenial installer image off USB also worked fine. The system boots fine, however the monitor is in DPMS power-off and does not ever turn back on. Switching VTs doesn't help, I have found no way to get it switch on. Removing '$vt_handoff' from grub resolves the problem and the system seems to work fine. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-31-generic 4.4.0-31.50 ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13 Uname: Linux 4.4.0-31-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: jgg 2224 F.... pulseaudio /dev/snd/controlC0: jgg 2224 F.... pulseaudio CurrentDesktop: Unity Date: Sun Jul 17 14:04:30 2016 HibernationDevice: RESUME=UUID=b254872c-e84b-427c-bebe-343c031cbdcd InstallationDate: Installed on 2016-04-22 (86 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1) IwConfig: lo no wireless extensions. enp6s0 no wireless extensions. MachineType: System manufacturer System Product Name ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-31-generic.efi.signed root=/dev/mapper/main2-xenial64 ro quiet splash RelatedPackageVersions: linux-restricted-modules-4.4.0-31-generic N/A linux-backports-modules-4.4.0-31-generic N/A linux-firmware 1.157.2 RfKill: SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/25/2010 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 0805 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: P8H67-M EVO dmi.board.vendor: ASUSTeK Computer INC. dmi.board.version: Rev 1.xx dmi.chassis.asset.tag: Asset-1234567890 dmi.chassis.type: 3 dmi.chassis.vendor: Chassis Manufacture dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0805:bd11/25/2010:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP8H67-MEVO:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.name: System Product Name dmi.product.version: System Version dmi.sys.vendor: System manufacturer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1603810/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
