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List:       kde-bugs-dist
Subject:    [kwin] [Bug 329979] kwin jerks when new windows are mapped and compositing is on
From:       Martin Gräßlin <mgraesslin () kde ! org>
Date:       2015-01-14 9:17:54
Message-ID: bug-329979-17878-C6MhTdiv8K () http ! bugs ! kde ! org/
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https://bugs.kde.org/show_bug.cgi?id=329979

Martin Gräßlin <mgraesslin@kde.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |CONFIRMED
     Ever confirmed|0                           |1

--- Comment #2 from Martin Gräßlin <mgraesslin@kde.org> ---
that sounds like mapping a window takes too long and we lose a frame because of
that. The situation might have improved with KWin 5.x as we are using xcb and
don't require that many roundtrips to the X server any more.

Overall it can only be perfectly fixed by using a dedicated compositing
rendering thread. That's still quite some work and won't happen any time soon,
unfortunately.

I'm not able to reproduce this problem when a new window is mapped, but see it
quite good when an application is launched from a launcher the moment one
clicks on the item. This looks like something is blocking (DBus?). Will
investigate.

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