** Attachment added: "kern.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1652644/+attachment/4796644/+files/kern.log
-- 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/1652644 Title: Switching users in Ubuntu/Ubuntu Gnome freezes graphics Status in linux package in Ubuntu: Confirmed Bug description: This bug was present in Ubuntu Gnome 16.04 LTS with GDM, but did a clean install of Ubutnu 16.04 LTS with Unity and LightDM, and the bug is still present. How to reproduce: 1. Boot the system, wait for LightDM to start and show the Ubuntu Unity greeter. 2. Log in as a user. 3. From the power menu (top right), choose an other user 4. In the password-promt (greeter) for the user, type in the correct password At this point, one of three thing might happen: a- The desktop, desktop icons, Unity-launcher and main menu for the user is loaded. The user can use the system as expected! b- The desktop, desktop icons and Unity-launcher the user is loaded. However, just before the main-menu-bar at the tops loads, the the graphics freezes. I can move the cursor, but that's it. It is not possible to click or do anything with the mouse-cursor. c- Same as (b), but during this process the screen goes complete blank (black), with only the cursor showing (and moving). When (b) or (c), pressing ALT+F1-F6 does not help, the screen just stays the same (except the cursor dispersers). Pressing ALT+F7 afterwards does not bring the cursor back. The system has not frozen. I can SSH to the box and it lives as nothing has happened. It's only effecting the display/graphics. This bug happens about 1/3 of the times I switch the user. Sometimes I can switch to and from users several times (2-5) before this bug comes to life. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-57-generic 4.4.0-57.78 ProcVersionSignature: Ubuntu 4.4.0-57.78-generic 4.4.35 Uname: Linux 4.4.0-57-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.4 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: sitron 1903 F.... pulseaudio Date: Mon Dec 26 16:58:42 2016 HibernationDevice: RESUME=UUID=9d82d48a-107c-4d15-844d-c4ba62a3d320 InstallationDate: Installed on 2016-12-18 (8 days ago) InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719) IwConfig: lo no wireless extensions. eno1 no wireless extensions. Lsusb: Bus 002 Device 003: ID 046d:c52b Logitech, Inc. Unifying Receiver Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-57-generic root=UUID=2a82deba-0eba-4358-b17c-65be40fe066f ro quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-4.4.0-57-generic N/A linux-backports-modules-4.4.0-57-generic N/A linux-firmware 1.157.6 RfKill: SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 10/21/2016 dmi.bios.vendor: Intel Corp. dmi.bios.version: GKPPT10H.86A.0060.2016.1021.1324 dmi.board.name: DCP847SKE dmi.board.vendor: Intel Corporation dmi.board.version: G80890-105 dmi.chassis.type: 3 dmi.modalias: dmi:bvnIntelCorp.:bvrGKPPT10H.86A.0060.2016.1021.1324:bd10/21/2016:svn:pn:pvr:rvnIntelCorporation:rnDCP847SKE:rvrG80890-105:cvn:ct3:cvr: To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1652644/+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
