To be explicit. We would like to obtain a system log with graphics debugging enabled, after reproducing the problem. We believe the following steps should achieve that:
1) reboot, interrupt grub, and add "drm.debug=6" to the kernel command line. There is a good guide on how to do this at the URL below, see the section "Temporarily Add a Kernel Boot Parameter for Testing": https://wiki.ubuntu.com/Kernel/KernelBootParameters 2) reproduce the issue 3) hit ctrl-alt-F1 to get the text login, and then hit the power button which should trigger a clean reboot. 4) boot normally, login and attach the files /var/log/dmesg, /var/log/dmesg.0 and /var/log/syslog. Hope that makes sense. -- 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/1315369 Title: Log in not available after lock screen with multi-monitor Status in Unity: Incomplete Status in “linux” package in Ubuntu: Incomplete Status in “unity” package in Ubuntu: Incomplete Status in “linux” source package in Trusty: Confirmed Status in “unity” source package in Trusty: Confirmed Bug description: After the screen locks I am unable to log back in because the screen with the login prompt is black, and the screen on my laptop just shows the Ubuntu logo. Furthermore, if I then unplug the external monitor (in an attempt to force the log in option to be displayed on the laptop) the laptop screen then goes black and I can't do anything at all. I can't reproduce this if I select "lock screen" from the UI, but it happens reliably if it locks due to inactivity. Other info: - I am running a fresh install of 14.04 - I have it set to lock after 5 min of inactivity, and require login after lock - I have an external monitor, configured to be on the left side of the laptop screen --- ApportVersion: 2.14.1-0ubuntu3 Architecture: i386 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: jane 2184 F.... pulseaudio /dev/snd/controlC0: jane 2184 F.... pulseaudio CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell] CurrentDesktop: Unity DistroRelease: Ubuntu 14.04 HibernationDevice: RESUME=UUID=61f52096-031e-4e3d-b1ae-e504b3b3edec InstallationDate: Installed on 2014-05-01 (20 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release i386 (20140417) MachineType: Dell Inc. Dell System XPS L321X Package: unity 7.2.0+14.04.20140416-0ubuntu1 PackageArchitecture: i386 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-24-generic root=/dev/mapper/ubuntu--vg-root ro persistent quiet splash ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9 RelatedPackageVersions: linux-restricted-modules-3.13.0-24-generic N/A linux-backports-modules-3.13.0-24-generic N/A linux-firmware 1.127 Tags: trusty trusty Uname: Linux 3.13.0-24-generic i686 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 04/09/2012 dmi.bios.vendor: Dell Inc. dmi.bios.version: A04 dmi.board.name: 085X6F dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnDellInc.:bvrA04:bd04/09/2012:svnDellInc.:pnDellSystemXPSL321X:pvr:rvnDellInc.:rn085X6F:rvrA00:cvnDellInc.:ct8:cvr0.1: dmi.product.name: Dell System XPS L321X dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/1315369/+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
