fglrx is the driver for my monitor, so I think that would explain the observed behavior --- if the new kernel won't load the driver, then I get a black screen but can still get a terminal.
I don't think disabling SecureBoot is an option (it's a dual-boot machine and I don't want to break something permanently), but I've found something online about using /usr/src/linux-headers-$(uname -r)/scripts /sign-file to self-sign a driver for SecureBoot. The instructions aren't working for me right now, but I'll work on that and get back to you. If that works, then yeah, we can assume that it's a SecureBoot issue. Thank you! -- 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/1603655 Title: After update, xorg will not boot Status in linux package in Ubuntu: Confirmed Bug description: Last night, Ubuntu Software Updater installed a round of updates. I shut down my computer, and when I booted this morning, the GUI failed to load or run at all. I switched to a terminal with Ctrl+Alt+F1, which worked fine. I tried rebooting into 3.13.0-91 via GRUB, at which point the GUI worked fine. Examining Ubuntu Software Center History, the new linux-image stood out, so I tried uninstalling that first. The command I ran was: sudo apt-get remove linux-image-extra-3.13.0-92-generic:amd64 linux-image-3.13.0-92-generic:amd64 linux-signed-image-3.13.0-92-generic:amd64 && sudo apt-get install linux-image-extra-3.13.0-91-generic:amd64 linux-image-3.13.0-91-generic:amd64 linux-signed-image-3.13.0-91-generic:amd64 My machine works fine now (with the old linux-image), but I thought I should inform you of the problem with the new linux-image. P.S. Since xorg is involved I tried to use ubuntu-bug xorg as the instructions said, but there was no way to enter an explanation, and reporting system information with no explanation *now* when my system is *working* would be completely misleading. There seems to be no way to attach any text or message to an ubuntu-bug report. I have attached the output from apport-bug --save=bugfilename linux-image-3.13.0-92-generic:amd64. --- ApportVersion: 2.14.1-0ubuntu3.21 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: david 1900 F.... pulseaudio /dev/snd/controlC0: david 1900 F.... pulseaudio CurrentDesktop: Unity DistroRelease: Ubuntu 14.04 HibernationDevice: RESUME=UUID=907fdd35-197c-4341-9daa-c29636443fb6 InstallationDate: Installed on 2014-06-06 (773 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417) MachineType: Hewlett-Packard HP Pavilion 17 Notebook PC NonfreeKernelModules: fglrx Package: linux (not installed) ProcFB: 0 EFI VGA ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-91-generic.efi.signed root=UUID=1fe70a4d-bce2-4bc1-921f-d793500b9af8 ro quiet splash crashkernel=384M-:128M vt.handoff=7 ProcVersionSignature: Ubuntu 3.13.0-91.138-generic 3.13.11-ckt39 RelatedPackageVersions: linux-restricted-modules-3.13.0-91-generic N/A linux-backports-modules-3.13.0-91-generic N/A linux-firmware 1.127.22 RfKill: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no Tags: trusty Uname: Linux 3.13.0-91-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 11/11/2014 dmi.bios.vendor: Insyde dmi.bios.version: F.35 dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: 1984 dmi.board.vendor: Hewlett-Packard dmi.board.version: 01.15 dmi.chassis.type: 10 dmi.chassis.vendor: Hewlett-Packard dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnInsyde:bvrF.35:bd11/11/2014:svnHewlett-Packard:pnHPPavilion17NotebookPC:pvr0880100021305B10000620100:rvnHewlett-Packard:rn1984:rvr01.15:cvnHewlett-Packard:ct10:cvrChassisVersion: dmi.product.name: HP Pavilion 17 Notebook PC dmi.product.version: 0880100021305B10000620100 dmi.sys.vendor: Hewlett-Packard To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1603655/+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
