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[Bug 1374785] Re: Screen-saver fade-to-black does not cover entire screen on HiDPI

 

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!

** Changed in: unity (Ubuntu Trusty)
       Status: New => Fix Committed

** Tags added: verification-needed-trusty

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https://bugs.launchpad.net/bugs/1374785

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

Status in Unity:
  Fix Committed
Status in Unity 7.2 series:
  In Progress
Status in unity package in Ubuntu:
  Fix Released
Status in unity source package in Trusty:
  Fix Committed

Bug description:
  [ 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.

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References