[Differential] [Request, 10 lines] D2374: [kded] fix monitoring for newly appearing outputs

[sebas (Sebastian Kügler)]

sebas created this revision.
sebas added a reviewer: Plasma.
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REVISION SUMMARY
  This patch makes the kded daemon monitor also newly connected outputs,
  and leads to correctly initialize outputs from a docking station plugged
  in after session start.
  
  For "internal" display connector ports (HDMI, DisplayPort, etc.
  integrated in the system, we know from the start that they exist. These
  are marked disconnected. When plugging in a docking station, new outputs
  (that aren't previously known as disconnected) appear. daemon.cpp only
  monitors outputs that change connection state, so it doesn't consider
  newly added outputs.
  
  By listening to KScreen::Config::outputAdded, we can detect new output
  (connectors) as well, so we can trigger the applyConfig code path, which
  leads to restoring the config.
  
  BUG:366346

TEST PLAN
  - Reproduced the issue in https://bugs.kde.org/show_bug.cgi?id=366346 and
  
  confirmed it fixes the problem on my system (Lenovo Onelink+ docking 
  station which shows the same behaviour).
  
  - Added debug calls and confirmed the new outputs are correctly set up.
  
  auto-testing this seems to be close to impossible. :/

REPOSITORY
  rKSCREEN KScreen

BRANCH
  sebas/newdockoutputs

REVISION DETAIL
  https://phabricator.kde.org/D2374

AFFECTED FILES
  kded/daemon.cpp

EMAIL PREFERENCES
  https://phabricator.kde.org/settings/panel/emailpreferences/

To: sebas, #plasma
Cc: plasma-devel, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas
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