Screen-saver fade-to-black does not cover entire screen on HiDPI

[Anthony S]

[ Impact ]

When display scaling is set to 2x or greater the fade-to-black animation when the screen saver is invoked covers only a fraction of the screen.

[ Test Case ]

Requires a display with 2x UI scaling (works best with a high-DPI display).

The fade-to-black which occurs prior to the screen shutting off only covers the top left quarter of the screen.

When scaling is set to 1x, the entire screen fades to black.

[ Regression Potential ]

An invalid scaling calculation (or rounding error) could result in writing outside the screen buffer bounds with resulting unknown impact. Inpspection and code review shows this not to be the case wit this patch.
[ Other Info ]

The Ubuntu 14.04 LTS SRU was cherry-picked from upstream Unity where it has been in production use in Ubuntu 'Vivid Vervet' for some time and has not shown ergressions.

[Launchpad Janitor (janitor)]

This bug was fixed in the package unity - 7.3.1+15.04.20141128-0ubuntu1

---------------
unity (7.3.1+15.04.20141128-0ubuntu1) vivid; urgency=low

  [ Andrea Azzarone ]
  * Unmap all windows during shutdown. (LP: #1370017, #1375271)
  * Make sure GetScreenGeometry returns the correct value. (LP:
    #1374785)

  [ Marco Trevisan (Treviño) ]
  * Decorated Window: still paint decorations if on transformated
    windows in different workspaces (LP: #1383468)
  * DecoratedWindow: make sure we always set a _NET_FRAME_EXTENTS for
    windows that requested it
  * UnityScreen: when filtering out windows in spread, make sure we
    unscale them (LP: #1316265)
  * PanelMenuView: ensure that proper window tiles and buttons are shown
    at the right place (LP: #1384958, #1384910, #1385285)
  * PanelService: inject special key events back to the root window when
    a menu is opened
  * PanelService: use gdbus to notfy upstart of service start/stop
 -- Ubuntu daily release <email address hidden> Fri, 28 Nov 2014 12:56:28 +0000

[Stephen M. Webb (bregma)]

Attached debdiff between trusty-updates and SRU.

[Chris J Arges (arges)]

Accepted unity into trusty-proposed. The package will build now and be available at http://launchpad.net/ubuntu/+source/unity/7.2.4+14.04.20141217-0ubuntu1 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!

[Anthony S (aaaantoine)]

Tested as instructed. This bug is confirmed fixed in the version of unity found in trusty-proposed.

Version: 7.2.4+14.04.20141217-0ubuntu1

[Andreas E. (andreas-e)]

Is it planned for this to appear in the current release (utopic proposed), or is the only option to upgrade at this early stage already to 15.04?

[Launchpad Janitor (janitor)]

This bug was fixed in the package unity - 7.2.4+14.04.20141217-0ubuntu1

---------------
unity (7.2.4+14.04.20141217-0ubuntu1) trusty; urgency=medium

  [ Andrea Azzarone ]
  * Share lockscreen password between screens (lp: #1308540)
  * Allow a distinct pam config file for greeter and for lock-screen.
    (lp: #1305440)
  * Add an arrow activator in the lockscreen. (lp: #1332509)
  * Make sure GetScreenGeometry returns the correct value (lp: #1374785).
  * unmapped all windows prior to shutdown (lp: #1370017) (lp: #1375271)

  [ Brandon Schaefer ]
  * fix tooltip for the "Show Desktop / Restore Windows" icon in the Alt-Tab
    switcher (lp: #1237132)
  * Use CONFIG instead of CACHE to store the first_run.stamp (lp: #1328677)

  [ Eleni Maria Stea ]
  * LayoutSystem: make sure the exposed open windows are displayed in the
    preserved order (lp: #1349281).

  [ handsome_feng ]
  * added support for getting the distro name from /etc/os-release
    (lp: #1329584)

  [ Iain Lane ]
  * When grabbing keys, try prefixing "XF86" if the key isn't found. GNOME
    gives us unprefixed keys sometimes (lp: #1302885).

  [ Marco Trevisan (Treviño) ]
  * make the Launcher icon count badge width depend on the text value width
    and scaling (lp: #1353070) (lp: #1354498) (lp: #796527) (lp: #1066971)
    (lp: #1361713)
  * DecoratedWindow: make edges independent from borders and properly update
    them on actions change (lp: #1276177), (lp: #1299741), (lp: #1301776),
    (lp: #1324104), (lp: #1364225), (lp: #1373695)
  * Lockscreen: scale the UI elements based on current monitor scaling
    (lp: #1292218)
  * UnityScreen: when filtering out windows in spread, make sure we unscale
    them (lp: #1316265).
  * PanelMenuView: ensure that proper window tiles and buttons are shown at
    the right place (lp: #1384910) (lp: #1384958) (lp: #1385285)
  * SearchBar, ActionButtons, IconRenderer: include the font scaling when
    scaling textual items (lp: #1332947) (lp: #1361751) (lp: #1362162)
    (lp: #1362346).
  * ApplicationLauncherIcon: make sure we close the dash if DnD is accepted
    and the application window is about to be focused (lp: #1350331).
  * SwitcherView: set progress on icon render args (lp: #1361679).
  * LockScreenController: wait for the primary shield to get the grab
    before setting the session locked (lp: #1368427) (lp: #1371764).
  * added decorations to windows in non-focused workspaces (lp: #1383468)

  [ Stephen M. Webb ]
  * updated the unity(1) manpage to match the actual command (lp: #1059275)
  * bumped package version to match upstream

  [ Marco Trevisan (Treviño) ]
  * Preparing for unity 7.2.4
 -- Ubuntu daily release <email address hidden> Wed, 17 Dec 2014 20:52:10 +0000

[Chris J Arges (arges)]

The verification of the Stable Release Update for unity has completed successfully and the package has now been released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.