I'd like to perform a kernel bisect to figure out which commit caused this regression. We need to identify the earliest kernel that did not exhibit the bug and the first kernel that did exhibit the bug.
Can you test the following upstream kernels and post back? v4.4.19: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4.19 v4.4.20: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4.20 v4.4.21: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4.21 Thanks in advance! ** Changed in: linux (Ubuntu) Importance: Undecided => High ** Also affects: linux (Ubuntu Xenial) Importance: Undecided Status: New ** Changed in: linux (Ubuntu Xenial) Status: New => Confirmed ** Changed in: linux (Ubuntu Xenial) Importance: Undecided => High ** Changed in: linux (Ubuntu Xenial) Importance: High => Critical ** Changed in: linux (Ubuntu) Importance: High => Critical ** Changed in: linux (Ubuntu) Status: Confirmed => Triaged ** Changed in: linux (Ubuntu Xenial) Status: Confirmed => Triaged -- 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/1627670 Title: 4.4.0-40.60 fails to boot Status in linux package in Ubuntu: Triaged Status in linux source package in Xenial: Triaged Bug description: I've just tried both -39 and -40 in xenial-proposed, and both fail to boot on my laptop (dropping to busybox - see the attached screenshot). This is a regression over -38, which works fine. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-38-generic 4.4.0-38.57 ProcVersionSignature: Ubuntu 4.4.0-38.57-generic 4.4.19 Uname: Linux 4.4.0-38-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: chr1s 2537 F.... pulseaudio /dev/snd/controlC1: chr1s 2537 F.... pulseaudio CurrentDesktop: Unity Date: Mon Sep 26 10:42:45 2016 HibernationDevice: RESUME=UUID=934c1be9-b0ee-4b9d-9508-7bfb0af474c9 InstallationDate: Installed on 2016-03-09 (200 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160307) MachineType: Dell Inc. Precision 7510 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-38-generic.efi.signed root=UUID=aa26703d-fe98-42ad-927a-31369b873d93 ro noprompt persistent quiet splash crashkernel=384M-:128M crashkernel=384M-:128M vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.4.0-38-generic N/A linux-backports-modules-4.4.0-38-generic N/A linux-firmware 1.157.4 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 05/27/2016 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.05.04 dmi.board.name: 0692Y5 dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.05.04:bd05/27/2016:svnDellInc.:pnPrecision7510:pvr:rvnDellInc.:rn0692Y5:rvrA00:cvnDellInc.:ct9:cvr: dmi.product.name: Precision 7510 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1627670/+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
