[Bug 1309744] Re: [SRU] Light Locker blanks the screen when playing video

[Colin Watson]

Hello Th3Pr0ph3t, or anyone else affected,

Accepted xdg-utils into trusty-proposed. The package will build now and
be available at http://launchpad.net/ubuntu/+source/xdg-
utils/1.1.0~rc1-2ubuntu7.1 in a few hours, and then in the -proposed
repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to
enable and use -proposed.  Your feedback will aid us getting this update
out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-needed to verification-done. If it does not fix the
bug for you, please add a comment stating that, and change the tag to
verification-failed.  In either case, details of your testing will help
us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: xdg-utils (Ubuntu Trusty)
       Status: In Progress => Fix Committed

** Tags added: verification-needed

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https://bugs.launchpad.net/bugs/1309744

Title:
  [SRU] Light Locker blanks the screen when playing video

Status in “xdg-utils” package in Ubuntu:
  Fix Released
Status in “xdg-utils” source package in Trusty:
  Fix Committed

Bug description:
  Problem description
  ---

  Expected behaviour:
  When playing back videos in fullscreen mode in Xubuntu's, the X11 screensaver should be inhibited. (Xubuntu previously used XScreensaver.)

  Behaviour:
  The screensaver blanks the screen (after the timeout that the user defined in light-locker-settings, by default 10mins) despite the video playing in fullscreen.

  [Test Case]
  Play back a video file in Parole with screenblanking enabled (can be checked with "xset q | grep timeout").

  [Regression potential]
  None apparent, tested in Trusty.

  [Other Info]
  A little background: this problem became apparent only in Trusty with the switch from XScreensaver to light-locker. As light-locker doesn't handle screenblanking itself but instead relies on X11's builtin screensaver (aka MIT screensaver extension), it needs xdg-utils/screensaver's support for inhibiting the blanking. For some reason, xdg-screensaver doesn't support controlling X11's screensaver extension in Xfce, probably for historical reasons (e.g. most distros with Xfce use XScreensaver).

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: vlc 2.1.2-2build2
  ProcVersionSignature: Ubuntu 3.13.0-20.42-generic 3.13.7
  Uname: Linux 3.13.0-20-generic x86_64
  NonfreeKernelModules: fglrx
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: amd64
  CurrentDesktop: XFCE
  Date: Fri Apr 18 15:41:48 2014
  InstallationDate: Installed on 2014-03-31 (18 days ago)
  InstallationMedia: Xubuntu 14.04 LTS "Trusty Tahr" - Beta amd64 (20140326)
  SourcePackage: vlc
  UpgradeStatus: No upgrade log present (probably fresh install)

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