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[Launchpad Bug Tracker <1291326@xxxxxxxxxxxxxxxxxx>]

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I'm using Kubuntu 14.04 64 bit on a Dell E5440 machine. After installing
the alpha2 version two weeks ago wakeup from sleep was working fine. I
update the system everyday and during last week something broke this
feature. From then I have updated the bios (from A00 version June 2013
to A04 January 2014) and I've seen other bugs (VGA out among others)
fixed, but not this one.

When the system wakes from sleep the login screen appears, but
mouse/keyboard don't working. I have found that plugin something to the
VGA out and unplugin it will bring mouse/keyboard alive again, but this
solution only works for the first time I enter sleep mode. Ctrl+Alt+F6
followed by Ctrl+Alt+F7 to return to the graphics mode ends with a black
screen (the mouse works, but no login is possible). I installed the
graphics driver with Optimus support (Prime), keeping active the Nvidia
card GT720M.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: xorg 1:7.7+1ubuntu8
ProcVersionSignature: Ubuntu 3.13.0-17.37-generic 3.13.6
Uname: Linux 3.13.0-17-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.13.3-0ubuntu1
Architecture: amd64
CurrentDesktop: KDE
Date: Wed Mar 12 12:28:20 2014
InstallationDate: Installed on 2014-02-27 (12 days ago)
InstallationMedia: Kubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140227)
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug trusty
-- 
Ubuntu 14.04 fail to wakeup from sleep
https://bugs.launchpad.net/bugs/1291326
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