Pirouette Cacahuète, the next step is to fully commit bisect from kernel 3.16 to 3.19 in order to identify the last good kernel commit, followed immediately by the first bad one. This will allow for a more expedited analysis of the root cause of your issue. Could you please do this following https://wiki.ubuntu.com/Kernel/KernelBisection ?
Please note, finding adjacent kernel versions is not fully commit bisecting. Thank you for your understanding. Helpful bug reporting tips: https://wiki.ubuntu.com/ReportingBugs ** Tags added: kernel-bug-exists-upstream-4.0-rc2 needs-bisect -- 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/1429489 Title: Suspend not working when closing lid on ThinkPad T420s Status in linux package in Ubuntu: Incomplete Bug description: Suspend doesn't work when closing the lid on my ThinkPad T420s. There is no issue with 14.10 or 14.04. Kernel 4.0 do not help. dmesg when closing/opening with kernel "Linux alex-ThinkPad-T420s 3.19.0-7-generic #7-Ubuntu SMP Thu Feb 26 20:19:34 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux": [ 94.842668] systemd-logind[1262]: Lid closed. [ 102.468204] systemd-logind[1262]: Lid opened. [ 102.468661] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus alignment [ 124.075694] systemd-logind[1262]: Removed session c1. The i915 seems to be unrelated: it appears after the lid is opened again, and "pci=noacpi" makes it disappear but the bug stays. I managed to got it to work, after playing with the e1000e driver as suggested on https://bbs.archlinux.org/viewtopic.php?pid=1414261#p1414261, but with a dubious and inconsistent state: - doing nothing, e1000e loaded, it never goes to suspend when I close the lid (tried 5 times) - removing e1000e, goes to suspend when I close the lid - doing nothing, e1000e removed, it again cannot go to suspend when I close the lid - loading e1000e, goes to suspend when I close the lid WORKAROUND: Manually suspend. --- ApportVersion: 2.16.2-0ubuntu1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: alex 1914 F.... pulseaudio CurrentDesktop: Unity DistroRelease: Ubuntu 15.04 InstallationDate: Installed on 2015-03-07 (0 days ago) InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1) MachineType: LENOVO 4171CTO Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-7-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 3.19.0-7.7-generic 3.19.0 Tags: vivid Uname: Linux 3.19.0-7-generic x86_64 UpgradeStatus: Upgraded to vivid on 2015-03-07 (0 days ago) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 07/18/2013 dmi.bios.vendor: LENOVO dmi.bios.version: 8CET58WW (1.38 ) dmi.board.asset.tag: Not Available dmi.board.name: 4171CTO dmi.board.vendor: LENOVO dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvr8CET58WW(1.38):bd07/18/2013:svnLENOVO:pn4171CTO:pvrThinkPadT420s:rvnLENOVO:rn4171CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 4171CTO dmi.product.version: ThinkPad T420s dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1429489/+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