Description was updated to be totally inaccurate. The problem is that the laptop does not suspend when the external monitor is attached. The problem is *not* that it doesn't resume from suspend.
The bug is that it will not suspend when the monitor is attached and the lid is closed. To suggest disconnecting the monitor as a workaround is somewhat unhelpful and akin to the old doctor joke of "it hurts when I do this", "then stop doing that". ** Description changed: - The laptop does not resume from suspend if a DisplayPort monitor is connected. Syslog notes: + The laptop does not suspend if a DisplayPort monitor is connected when + the lid is closed. + + Syslog notes: Dec 13 21:19:11 down kernel: [ 1627.804109] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus alignment WORKAROUND: Unplug DisplayPort connected to monitor from laptop prior to suspending. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-53-generic 4.4.0-53.74 ProcVersionSignature: Ubuntu 4.4.0-53.74-generic 4.4.30 Uname: Linux 4.4.0-53-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: james 19076 F.... pulseaudio /dev/snd/controlC0: james 19076 F.... pulseaudio CurrentDesktop: Unity Date: Tue Dec 13 21:16:56 2016 EcryptfsInUse: Yes InstallationDate: Installed on 2016-07-10 (156 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1) MachineType: LENOVO 20BXCTO1WW ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-53-generic.efi.signed root=UUID=43c9674c-79b5-4ed6-b8fd-ea2a6c3d0947 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.4.0-53-generic N/A linux-backports-modules-4.4.0-53-generic N/A linux-firmware 1.157.5 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 01/27/2016 dmi.bios.vendor: LENOVO dmi.bios.version: JBET56WW (1.21 ) dmi.board.asset.tag: Not Available dmi.board.name: 20BXCTO1WW dmi.board.vendor: LENOVO dmi.board.version: SDK0J40709 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrJBET56WW(1.21):bd01/27/2016:svnLENOVO:pn20BXCTO1WW:pvrThinkPadT450s:rvnLENOVO:rn20BXCTO1WW:rvrSDK0J40709WIN:cvnLENOVO:ct10:cvrNone: dmi.product.name: 20BXCTO1WW dmi.product.version: ThinkPad T450s dmi.sys.vendor: LENOVO -- 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/1649752 Title: Suspend does not work on lid close, if external display connected Status in linux package in Ubuntu: Confirmed Bug description: The laptop does not suspend if a DisplayPort monitor is connected when the lid is closed. Syslog notes: Dec 13 21:19:11 down kernel: [ 1627.804109] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus alignment WORKAROUND: Unplug DisplayPort connected to monitor from laptop prior to suspending. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-53-generic 4.4.0-53.74 ProcVersionSignature: Ubuntu 4.4.0-53.74-generic 4.4.30 Uname: Linux 4.4.0-53-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: james 19076 F.... pulseaudio /dev/snd/controlC0: james 19076 F.... pulseaudio CurrentDesktop: Unity Date: Tue Dec 13 21:16:56 2016 EcryptfsInUse: Yes InstallationDate: Installed on 2016-07-10 (156 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1) MachineType: LENOVO 20BXCTO1WW ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-53-generic.efi.signed root=UUID=43c9674c-79b5-4ed6-b8fd-ea2a6c3d0947 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.4.0-53-generic N/A linux-backports-modules-4.4.0-53-generic N/A linux-firmware 1.157.5 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 01/27/2016 dmi.bios.vendor: LENOVO dmi.bios.version: JBET56WW (1.21 ) dmi.board.asset.tag: Not Available dmi.board.name: 20BXCTO1WW dmi.board.vendor: LENOVO dmi.board.version: SDK0J40709 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrJBET56WW(1.21):bd01/27/2016:svnLENOVO:pn20BXCTO1WW:pvrThinkPadT450s:rvnLENOVO:rn20BXCTO1WW:rvrSDK0J40709WIN:cvnLENOVO:ct10:cvrNone: dmi.product.name: 20BXCTO1WW dmi.product.version: ThinkPad T450s dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1649752/+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