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:
USERPID ACCESS COMMAND
/dev/snd/controlC1: rkd1765 F pulseaudio
rkd2010 F pulseaudio
/dev/snd/controlC0: rkd1765 F pulseaudio
rkd2010 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
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https://bugs.launchpad.net/bugs/1295382
Title:
Dell Latitude E7240 does not resume from suspend
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