[MacPorts] #45910: okular @0.6.4 makes broken screen when scrolling

MacPorts noreply at macports.org
Wed Mar 4 15:05:45 PST 2015


#45910: okular @0.6.4 makes broken screen when scrolling
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  Reporter:  lightoml@…  |      Owner:  nicos@…
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  okular      |
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Comment (by xfacter@…):

 Actually, I just tested it with a magic mouse and trackpad on internal and
 external monitors, and I can confirm that the issue does NOT go away for
 any combination. In fact, I believe I found the real issue. The issue
 persists with the magic mouse, but it is far less pronounced. I noticed it
 only seems to happen at the beginning or end of scrolls when placing or
 removing my finger from the magic mouse. Then I noticed that if I am very
 careful to scroll as vertically as possible, the issue goes away or
 happens very infrequently. Next I tried scrolling very carefully with the
 trackpad, and the issue is still bad but less pronounced than normal.
 Finally, I tried scrolling with both the trackpad and magic mouse with
 some horizontal component to my scroll direction. The issue becomes very
 pronounced.

 So, I believe the issue is that the rendering pipeline somehow gets
 confused when the input device attempts to scroll in a direction with some
 horizontal component. This only seems to be the case when directly
 scrolling with hardware -- i.e. click+drag with the mouse is unaffected.
 So it makes sense that the issue would go away when using a mouse that
 only scrolls vertically. Please try for yourself if you are able to
 reproduce the issue.

 By the way, while I'm here I might as well ask if anyone else has issues
 with the "reload on file change" feature constantly trying to reload the
 document and causing lag, in 2.3.3 on Yosemite? I'll make a new ticket if
 it's not already been discussed elsewhere.

-- 
Ticket URL: <https://trac.macports.org/ticket/45910#comment:19>
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