Public bug reported: Seen with 14.04 beta 1 (Trusty).
When I suspend my Dell Latitude E7240 laptop (either by closing the lid, running pm-suspend or selecting Sleep from the KDE menu) it suspends successfully and the power LED flashes. When I try and resume it (either by opening the laptop or by pressing the power button), it starts to resume (the power button stops flashing and is fully lit up) but nothing appears on the screen and my wifi indicator starts flashing (on for ~4 seconds, off for ~4 seconds) until I power off the machine by holding the power button down. I've reproduced this with linux-image-3.14.0-031400rc7-generic (the latest non-nightly kernel mainline), as recommended by https://wiki.ubuntu.com/DebuggingKernelSuspend. I've also booted into the 12.04 Kubuntu install CD and suspended that, which experiences the same problem. I'm using the latest BIOS (A08). I'm reasonably confident this isn't a problem with my wifi card - I experience the same symptoms when it is disabled in the BIOS or switched off by the hardware switch. I've followed the pm_trace instructions at https://wiki.ubuntu.com/DebuggingKernelSuspend and attached it. That does include the lines: [ 1.458151] Magic number: 6:635:599 [ 1.458165] serial8250 serial8250: hash matches However, lsmod doesn't show a serial8250 module loaded. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-generic 3.13.0.12.16 ProcVersionSignature: Ubuntu 3.13.0-12.32-generic 3.13.4 Uname: Linux 3.13.0-12-generic x86_64 ApportVersion: 2.13.3-0ubuntu1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: rkd 1765 F.... pulseaudio rkd 2010 F.... pulseaudio /dev/snd/controlC0: rkd 1765 F.... pulseaudio rkd 2010 F.... pulseaudio CurrentDesktop: KDE Date: Thu Mar 20 21:23:36 2014 HibernationDevice: RESUME=UUID=2e1c8ed9-ac52-4045-a6b2-affdbd3a0594 InstallationDate: Installed on 2014-03-20 (0 days ago) InstallationMedia: Kubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140227) MachineType: Dell Inc. Latitude E7240 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-12-generic root=UUID=de5a2758-01bf-4e83-86f3-6eca4f55fdb2 ro rootflags=subvol=@ quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-12-generic N/A linux-backports-modules-3.13.0-12-generic N/A linux-firmware 1.126 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 02/18/2014 dmi.bios.vendor: Dell Inc. dmi.bios.version: A08 dmi.board.name: 0R8R7K dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA08:bd02/18/2014:svnDellInc.:pnLatitudeE7240:pvr01:rvnDellInc.:rn0R8R7K:rvrA00:cvnDellInc.:ct9:cvr: dmi.product.name: Latitude E7240 dmi.product.version: 01 dmi.sys.vendor: Dell Inc. ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug third-party-packages trusty ** Attachment added: "pm_trace dmesg file recommended by https://wiki.ubuntu.com/DebuggingKernelSuspend"; https://bugs.launchpad.net/bugs/1295382/+attachment/4034679/+files/dmesg2.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1295382 Title: Dell Latitude E7240 does not resume from suspend To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1295382/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
