This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1718047 and then change the status of the bug to 'Confirmed'. If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'. This change has been made by an automated script, maintained by the Ubuntu Kernel Team. ** Changed in: linux (Ubuntu) Status: New => Incomplete -- 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/1718047 Title: Kernel 4.4.0-93 - Suddenly freezing on boot. Status in linux package in Ubuntu: Confirmed Bug description: Ubuntu 16.04: has been working fine for a year and a half, now suddenly freezing on bootup, with a permanent spinning logo. The problem appears with the new (4.4.0-93) kernel. (Things were fine in 4.4.0-93.) My system has /boot on a USB and root on LUKS (along with a 2nd data disk on LUKS). I can boot via a text console if I remove the "splash" kernel switch and changed $vt.handoff to "$vt.handoff=7". Unfortunately, adding the "debug" switch causes a freeze, though "debug=vc" boots. Also, for any of the settings that cause a freeze, if I add "break=mountroot", I can mount the LUKS disks by hand and continue with boot. --- ApportVersion: 2.20.1-0ubuntu2.10 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC2: dev 2272 F.... pulseaudio /dev/snd/controlC1: dev 2272 F.... pulseaudio /dev/snd/controlC0: dev 2272 F.... pulseaudio CurrentDesktop: GNOME DistroRelease: Ubuntu 16.04 InstallationDate: Installed on 2016-05-31 (475 days ago) InstallationMedia: Ubuntu-GNOME 16.04 LTS "Xenial Xerus" - Release amd64 (20160421) MachineType: LENOVO 23591L9 Package: linux (not installed) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb 1 nouveaufb ProcKernelCmdLine: BOOT_IMAGE=/@t530boot/vmlinuz-4.4.0-93-generic root=/username/mapper/luks.root ro rootflags=subvol=@ quiet vt.handoff=7=7 ProcVersionSignature: Ubuntu 4.4.0-93.116-generic 4.4.79 RelatedPackageVersions: linux-restricted-modules-4.4.0-93-generic N/A linux-backports-modules-4.4.0-93-generic N/A linux-firmware 1.157.12 Tags: xenial Uname: Linux 4.4.0-93-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip libvirtd lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 09/10/2015 dmi.bios.vendor: LENOVO dmi.bios.version: G4ETA5WW (2.65 ) dmi.board.asset.tag: Not Available dmi.board.name: 23591L9 dmi.board.vendor: LENOVO dmi.board.version: 0B98413 Std dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvrG4ETA5WW(2.65):bd09/10/2015:svnLENOVO:pn23591L9:pvrThinkPadT530:rvnLENOVO:rn23591L9:rvr0B98413Std:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 23591L9 dmi.product.version: ThinkPad T530 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1718047/+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