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[Bug 1431128] Re: screen remains blank after waking up from suspend

To: touch-packages@xxxxxxxxxxxxxxxxxxx
From: TienFu Chen <tienfu.chen@xxxxxxxxxxxxx>
Date: Thu, 12 Mar 2015 03:42:59 -0000
Reply-to: Bug 1431128 <1431128@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

This issue seems related to lp:1405349, not sure if it is the same root-
cause.

** Description changed:

Steps:
- 1. Suspend the computer by pressing the Sleep key
+ 1. Suspend the computer by pressing the Sleep key(Fn+F2 on the keyboard here)
2. Press any key on the keyboard or the Power button to wake the device up

Expected results:
1. The system suspends and the Power button LED blinks
2. The system wakes up and user can log in.

Actual results:
1. The system suspends and the Power button LED blinks (OK)
2. The login screen appears and the screen is immediately turned off (NOK). User needs to move the mouse or enter a key to turn the screen on.

Additional information:

- In a few additional occasions, after performing this action several
times (pressing the Sleep key to suspend the system, then wake it up),
the system freezes at log in screen just before going to suspend mode.
It has to be force-stopped and restarted.

- Please note that this problem does NOT happen when suspending from the
User Menu or using the Power button and selecting Suspend.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: lightdm 1.10.4-0ubuntu2
ProcVersionSignature: Ubuntu 3.13.0-34.60-generic 3.13.11.4
Uname: Linux 3.13.0-34-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.7
Architecture: amd64
Date: Thu Mar 12 11:19:32 2015
DistributionChannelDescriptor:
# This is a distribution channel descriptor
# For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
canonical-oem-stella-datong140729-kylin-trusty-amd64-20150205-2
InstallationDate: Installed on 2015-02-10 (29 days ago)
InstallationMedia: Ubuntu 14.04 "Trusty" - Build amd64 LIVE Binary 20150205-07:08
LightdmConfig:
[SeatDefaults]
autologin-guest=false
autologin-user-timeout=0
autologin-session=lightdm-autologin
#autologin-user=u
SourcePackage: lightdm
UpgradeStatus: No upgrade log present (probably fresh install)

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Touch seeded packages, which is subscribed to lightdm in Ubuntu.
https://bugs.launchpad.net/bugs/1431128

Title:
screen remains blank after waking up from suspend

Status in OEM Priority Project:
New
Status in OEM Priority Project trusty series:
New
Status in lightdm package in Ubuntu:
New

Bug description:
Steps:
1. Suspend the computer by pressing the Sleep key(Fn+F2 on the keyboard here)
2. Press any key on the keyboard or the Power button to wake the device up

Expected results:
1. The system suspends and the Power button LED blinks
2. The system wakes up and user can log in.

Additional information:

- Please note that this problem does NOT happen when suspending from
the User Menu or using the Power button and selecting Suspend.

To manage notifications about this bug go to:
https://bugs.launchpad.net/oem-priority/+bug/1431128/+subscriptions

References

[Bug 1431128] [NEW] screen remains blank after waking up from suspend
From: Pierre Equoy, 2015-03-12