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** Tags added: focal

** Changed in: gnome-shell (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1863391

Title:
  GNOME fractional scaling: fullscreen video misbehaves

Status in gnome-shell package in Ubuntu:
  Incomplete

Bug description:
  When scaling the desktop to e.g. 150%, fullscreen video does seem to
  trigger constant changes of the scaling factor: the system switches
  every 0.5s from 150% to 100% to 200% or things like those.

  The problem does not occur, when there is another windows present
  (e.g. a "always-on-top" terminal windows).

  Also, KDE doesn't have this problem.

  The problem exists in freshly installed 19.10 and 20.04, too. I couldn't find 
any reason, why sometimes firefox fullscreen videos do work and sometimes not. 
  Video playback (e.g. GNOME video player or VLC) does not work properly in 
19.10, whereas it works most of the time in 20.04.

  How can I help to dig into this?

  1) Ubuntu 19.10, 20.04
  2) latest available (problem exists since several weeks)
  3) What you expected to happen: fullscreen video playback in scaled mode
  4) What happened instead: screen starts changing (randomly?) the scaling 
factor or at least this is the impression one gets

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