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[Erich Eickmeyer <1847864@xxxxxxxxxxxxxxxxxx>]

Cannot reproduce here.  Has this problem persisted with newer versions
of Darktable? Also, check to make sure you're not running on Wayland in
18.04.

** Changed in: darktable (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1847864

Title:
  screen flashes while interaction in fullscreen

Status in darktable package in Ubuntu:
  Incomplete

Bug description:
  If darkttable is running fullscreen (F11) on Ubuntu 18.04 with my
  Thinpad T480s, there are annoying flashes of the screen in fullscreen
  mode on iteraction.

  For example: If I adjust the base color curve while on fullscreen, the
  start and end of the mouse dragging the curves control points often
  result in brief (almost a single frame) white screen flash.

  This is extremely disturbing when working in dim environments suitable
  for image processing.

  The bug does not seem to occur if darktable is run in windowed mode.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: darktable 2.4.2-1
  ProcVersionSignature: Ubuntu 5.0.0-31.33~18.04.1-generic 5.0.21
  Uname: Linux 5.0.0-31-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.7
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Sat Oct 12 17:13:51 2019
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2019-09-17 (24 days ago)
  InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  SourcePackage: darktable
  UpgradeStatus: No upgrade log present (probably fresh install)

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