The kernel in #45: 1) exhibits the window shuffling issue. 2) if I lock the screen, and sit back for a few seconds, the display blanks, and then (almost immediately) unblanks. I would expect it to remain blanked until there was mouse or keyboard activity.
I suspect that the next step is to instrument things to produce an audit trail of what queries are hitting the driver about the display, and what it's saying... It's behaving like it only sees 1 display part of the time, while both are actually present. -- 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/1543683 Title: Fails to detect (second) display Status in linux package in Ubuntu: Fix Released Status in linux source package in Xenial: Fix Released Bug description: With the upgrade to 4.4.0-2, only one of the two displays in the machine is detected. With 4.3.0-7 (and earlier) both are detected. In this case, both display connectors are on the MB. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-extra-4.4.0-2-generic 4.4.0-2.16 ProcVersionSignature: Ubuntu 4.4.0-2.16-generic 4.4.0 Uname: Linux 4.4.0-2-generic x86_64 ApportVersion: 2.19.4-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: lamont 3923 F.... pulseaudio CurrentDesktop: Unity Date: Tue Feb 9 10:22:38 2016 HibernationDevice: RESUME=UUID=5d145c55-633f-4197-a4c9-0b165b6dbeb3 InstallationDate: Installed on 2014-09-22 (505 days ago) InstallationMedia: Ubuntu-Server 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2) MachineType: Shuttle Inc SG41 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-2-generic root=UUID=ba0ea95b-cde0-42ba-b06e-9fd6ca006881 ro nomdmonddf nomdmonisw RelatedPackageVersions: linux-restricted-modules-4.4.0-2-generic N/A linux-backports-modules-4.4.0-2-generic N/A linux-firmware 1.155 RfKill: 0: hci0: Bluetooth Soft blocked: no Hard blocked: no SourcePackage: linux UpgradeStatus: Upgraded to xenial on 2014-11-14 (452 days ago) dmi.bios.date: 02/10/2011 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 080015 dmi.board.asset.tag: To Be Filled By O.E.M. dmi.board.name: FG41 dmi.board.vendor: Shuttle Inc dmi.board.version: V20 dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: Shuttle Inc dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr080015:bd02/10/2011:svnShuttleInc:pnSG41:pvrV20:rvnShuttleInc:rnFG41:rvrV20:cvnShuttleInc:ct3:cvrToBeFilledByO.E.M.: dmi.product.name: SG41 dmi.product.version: V20 dmi.sys.vendor: Shuttle Inc To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1543683/+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