I don’t think I’ve seen it. Does it happen if you don’t connect the external
monitor?
Maybe try running with:
export J2D_TRACE_LEVEL=4
to see if there are any debug messages that might give a hint as to what is
going on. you could also try forcing openGL off with:
-Dsun.java2d.opengl=false.
Scott
> On Dec 3, 2015, at 12:19 AM, Eirik Bakke <eba...@mit.edu> wrote:
>
> Hi, macosx-port-dev.
>
> Below is a bug report about a paint flicker bug on MacOS. I've tried to
> capture it on video here<https://vimeo.com/147649683>, although it's hard to
> see due to my camera's limited frame rate. Has anyone else observed this bug?
> Is this the right mailing list to ask on?
>
> -- Eirik
>
> ===== Bug report follows =====
> There seems to be an intermittent but bad paint bug in recent versions of
> Java for MacOS (last 6-12 months; unsure which exact version it first
> appeared in). In my setup, I have the NetBeans IDE running on my MacBook Air
> for most of the day, and I connect and disconnect an external 2560x1440
> monitor several times a day. About once a week, my running Java app (NetBeans
> IDE or the Java app I'm developing) enters a mode where all paint updates
> happen with a very noticable flicker. This is especially jarring when
> scrolling in a JScrollPane or typing text in the NetBeans editor. Typing also
> seems to be delayed. The flicker can also be seen in the indeterminate
> JProgressBar animation (blue stripey barberpole animation). The workaround is
> to restart the IDE or Java app in question.
>
> From observing the bug, what seems to be happening is that every time a new
> frame is painted, the old frame becomes briefly visible again for a fraction
> of a second before the new frame reappears. For instance, suppose the editor
> shows the word "tes" and the user types "t", then the following will happen:
>
> 1) The editor first shows "tes|". (where | is the cursor)
> 2) The user then types the letter "t", and the editor updates to show "test|".
> 3) Immediately afterwards, for a very brief moment, the editor shows "tes|"
> again.
> 4) Immediately afterwards again, the editor finally shows "test|" again.
>
> The bug appeared again today and I've tried to capture it on this video:
> https://vimeo.com/147649683 . However, the flickering happens so fast that
> it's difficult to see what's going on in a low-frame-rate screen recording.
> You can just see it happening during scrolling at 01:13 (compare with smooth
> scrolling in a different Java app for which the bug has not manifested itself
> at 02:40) and during editing right after 01:48. During editing, notice how
> the text cursor skips back while I'm typing characters (the recording only
> manages to catch it doing this every now and then).
>
> Product Version: NetBeans IDE 8.1 (Build 201510222201)
> Java: 1.8.0_66; Java HotSpot(TM) 64-Bit Server VM 25.66-b17
> Runtime: Java(TM) SE Runtime Environment 1.8.0_66-b17
> System: Mac OS X version 10.9.5 running on x86_64; UTF-8; en_US (nb)
> Hardware: 13-inch MacBook Air, Mid 2012
> ========================
>
>
>
