apport information ** Attachment added: "ProcInterrupts.txt" https://bugs.launchpad.net/bugs/1681040/+attachment/4858938/+files/ProcInterrupts.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/1681040 Title: Scaled display resolution is not detected correctly in lightdm display manager Status in linux package in Ubuntu: Confirmed Bug description: Environment: Ubuntu 16.04.2 LTS nvidia-375 I have a laptop screen with resolution 3840x2160 and external display with resolution 3440x1440. I am scaling laptop display to resolution 1920x1080 with command nvidia-settings --attach CurrentMetaMode="DPY-0: nvidia-auto-select @3440x1440 +1920+0 {ViewPortIn=3440x1440, ViewPortOut=3440x1440+0+0}, DPY-3: nvidia-auto-select @1920x1080 +0+0 {ViewPortIn=1920x1080, ViewPortOut=3840x2160+0+0}" Bug: Display manager is not detecting scaled resolution correctly. Please see the attachment. Caused effect: When focus is on laptop display and pressing Alt + Tab the application switcher is not shown in center of laptop display but partly in external display. $ apt-cache policy lightdm lightdm: Installed: 1.18.3-0ubuntu1.1 Candidate: 1.18.3-0ubuntu1.1 --- ApportVersion: 2.20.1-0ubuntu2.5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: markus 3264 F.... pulseaudio /dev/snd/controlC0: markus 3264 F.... pulseaudio CurrentDesktop: Unity DistroRelease: Ubuntu 16.04 EcryptfsInUse: Yes InstallationDate: Installed on 2017-04-07 (2 days ago) InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2) Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 003: ID 8087:0a2b Intel Corp. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: HP HP ZBook Studio G3 NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia Package: linux (not installed) ProcFB: 0 EFI VGA ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.8.0-46-generic.efi.signed root=UUID=2b78b572-05a1-4c01-b97d-9c1fea406faf ro quiet splash nomodeset pnpacpi=off vt.handoff=7 ProcVersionSignature: Ubuntu 4.8.0-46.49~16.04.1-generic 4.8.17 RelatedPackageVersions: linux-restricted-modules-4.8.0-46-generic N/A linux-backports-modules-4.8.0-46-generic N/A linux-firmware 1.157.8 Tags: xenial Uname: Linux 4.8.0-46-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 11/02/2016 dmi.bios.vendor: HP dmi.bios.version: N82 Ver. 01.15 dmi.board.name: 80D4 dmi.board.vendor: HP dmi.board.version: KBC Version 11.67 dmi.chassis.type: 10 dmi.chassis.vendor: HP dmi.modalias: dmi:bvnHP:bvrN82Ver.01.15:bd11/02/2016:svnHP:pnHPZBookStudioG3:pvr:rvnHP:rn80D4:rvrKBCVersion11.67:cvnHP:ct10:cvr: dmi.product.name: HP ZBook Studio G3 dmi.sys.vendor: HP To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1681040/+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
