Laptop does not suspend on lid close when external monitor connected

[Colin Law]

Since update to Vivid, laptop does not suspend on lid close if an external monitor is connected. The external monitor blanks briefly and then resumes.
It suspends ok using the menu and does suspend on lid close if the external monitor is not connected.
On Utopic it suspended ok with external monitor.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: linux-image-3.18.0-13-generic 3.18.0-13.14
ProcVersionSignature: Ubuntu 3.18.0-13.14-generic 3.18.5
Uname: Linux 3.18.0-13-generic x86_64
ApportVersion: 2.16.1-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: colinl 2141 F.... pulseaudio
 /dev/snd/controlC1: colinl 2141 F.... pulseaudio
CurrentDesktop: Unity
Date: Thu Feb 26 20:50:04 2015
InstallationDate: Installed on 2014-10-21 (128 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20141017)
MachineType: FUJITSU LIFEBOOK A544
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.18.0-13-generic root=UUID=c68c6484-d8d6-44f6-b429-892aa6ef74cf ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.18.0-13-generic N/A
 linux-backports-modules-3.18.0-13-generic N/A
 linux-firmware 1.141
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: yes
  Hard blocked: no
SourcePackage: linux
UpgradeStatus: Upgraded to vivid on 2015-02-25 (0 days ago)
dmi.bios.date: 05/09/2014
dmi.bios.vendor: FUJITSU // Phoenix Technologies Ltd.
dmi.bios.version: Version 1.17
dmi.board.name: FJNBB35
dmi.board.vendor: FUJITSU
dmi.chassis.type: 10
dmi.chassis.vendor: FUJITSU
dmi.modalias: dmi:bvnFUJITSU//PhoenixTechnologiesLtd.:bvrVersion1.17:bd05/09/2014:svnFUJITSU:pnLIFEBOOKA544:pvr:rvnFUJITSU:rnFJNBB35:rvr:cvnFUJITSU:ct10:cvr:
dmi.product.name: LIFEBOOK A544
dmi.sys.vendor: FUJITSU

[Brad Figg (brad-figg)]

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.0 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.0-rc1-vivid/

[Colin Law (colin-law)]

Bug still present in kernel 4.0-rc1-vivid

[Colin Law (colin-law)]

Is this definitely a kernel problem? The same thing happened a few Ubuntu versions ago and then I thought it was due to a decision in upstream gnome somewhere that a laptop with external monitor should not suspend when lid is closed, but that eventually got reverted, either upstream or in Ubuntu, not sure which.