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I use my system connected to a TV screen via HDMI. The TV screen is also used
as a regular TV, input selected to be either HDMI or "antenna". After upgrading
to 14.04 LTS, after a while of watching regular TV and going back to HDMI
display, the TV reports "No signal". I try to revive by moving the mouse or
press the keyboard, but nothing happens. I try to reconnect the HDMI cable, but
no change. The keyboard and mouse are wireless with a USB reciever/transmitter
from Logitech. The only way to restore operation is by forced power recycling,
or connect remotely via ssh and do "reboot".
I have tried to set the screensaver and power manager so that the computer
never idles, but there is no improvement.
I have had some trouble with the NVIDIA driver, the HDMI sound
configuration is not stable. HDMI sound units come and go between boots.
Maybe it is connected.
Nothing of this happened in the previous release, 13.04LTS.
The desktop display was readily available after setting the HDMI input selector
on the TV after watching regular channels.
bnilsson@HTPC:~$ lsb_release -rd
Description: Ubuntu 14.04 LTS
Release: 14.04
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-release-upgrader-core 1:0.220.2
ProcVersionSignature: Ubuntu 3.13.0-24.46-lowlatency 3.13.9
Uname: Linux 3.13.0-24-lowlatency x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: XFCE
Date: Sun Apr 27 22:50:58 2014
InstallationDate: Installed on 2013-08-24 (246 days ago)
InstallationMedia: Ubuntu-Studio 13.04 "Raring Ringtail" - Release amd64
(20130424)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
Symptom: dist-upgrade
UpgradeStatus: Upgraded to trusty on 2014-04-18 (9 days ago)
VarLogDistupgradeTermlog:
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug dist-upgrade trusty
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Cannot restore HDMI display after regular TV session
https://bugs.launchpad.net/bugs/1313443
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