apport information ** Attachment added: "ProcEnviron.txt" https://bugs.launchpad.net/bugs/1516216/+attachment/4519358/+files/ProcEnviron.txt
-- 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/1516216 Title: X fails to start, starting with kernel version 3.13.0-66 including 3.13.0-68 Status in linux package in Ubuntu: Incomplete Bug description: System: Ubuntu 14.04 Graphics Card: Geforce GTX 670 Graphics Driver: nvidia-352.55 Starting with kernel 3.13.0-66, the start of X / default display manager results in a black screen. My observations are: - When I get this black screen, I cannot CTRL+ALT+F1 into a text console - Pressing the power button in this state leads to a proper shutdown (which I guess means that it is not a complete kernel panic). - When using these latest kernel, the graphics behavior during boot-up also has changed. Instead of a graphical animation, the system boots in text mode (I can see the syslog output), and at the moment I should get the display manager, the screen goes black. My work-around so far has been to boot kernel 3.13.0-65 instead of 3.13.0-66, 3.13.0-67, or 3.13.0-68. So far this has worked reliably. However today, booting kernel 3.13.0-65 has resulted in a black screen as well. Fortunately, I found a new work-around: I can boot kernel 3.13.0-68 in recovery mode, and chose simply "continue" in the recovery console. With this modification of the boot process, X will start. In the syslog, I can see some suspicious messages, around the time X should start: "BUG: unable to handle kernel NULL pointer dereference at (null)". I have attached a syslog contain some failed starts as well as a successful one. Another suspicion is that the problem is related having an Oculus Rift DK2 connected. In particular, this requires to use a custom Xorg.conf which runs individual X screens for the main display and the Oculus Rift. --- ApportVersion: 2.14.1-0ubuntu3.18 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: fabian 2526 F.... pulseaudio /dev/snd/controlC0: fabian 2526 F.... pulseaudio CurrentDesktop: Unity DistroRelease: Ubuntu 14.04 HibernationDevice: RESUME=UUID=dfcf8d87-ab70-490e-922d-2ccfd8acdfcc InstallationDate: Installed on 2014-04-24 (569 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417) IwConfig: eth0 no wireless extensions. lo no wireless extensions. MachineType: MSI MS-7816 NonfreeKernelModules: nvidia Package: linux (not installed) ProcFB: ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-68-generic root=UUID=58115c9d-156a-4608-9adb-e20d7ffc9b11 ro recovery nomodeset ProcVersionSignature: Ubuntu 3.13.0-68.111-generic 3.13.11-ckt27 RelatedPackageVersions: linux-restricted-modules-3.13.0-68-generic N/A linux-backports-modules-3.13.0-68-generic N/A linux-firmware 1.127.18 RfKill: Tags: trusty Uname: Linux 3.13.0-68-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 05/17/2013 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: V1.2 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: Z87-G43 (MS-7816) dmi.board.vendor: MSI dmi.board.version: 1.0 dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: MSI dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV1.2:bd05/17/2013:svnMSI:pnMS-7816:pvr1.0:rvnMSI:rnZ87-G43(MS-7816):rvr1.0:cvnMSI:ct3:cvr1.0: dmi.product.name: MS-7816 dmi.product.version: 1.0 dmi.sys.vendor: MSI To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1516216/+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
