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Re: XWin 100% CPU usage for Java applications on Vista


Hello,

This 100% issue is a known problem with XWin on 2003 and Vista; it gets continually posted on this list.
And no, -engine 1 is not the cure, i think the problem has to be analysed and remedied by the cygwin/cygwin-xfree developers.
Xming (same code base?!) btw does not suffer from this problem (at least not on 2003R2; haven`t tried with Vista).


Cheers

Franz


----- Original Message ----- From: "Vladimir Nicolici" <vladnc@gmail.com>
To: <cygwin-xfree@cygwin.com>
Sent: Saturday, March 24, 2007 2:42 PM
Subject: Re: XWin 100% CPU usage for Java applications on Vista



On 3/24/07, Holger Krull <holger.krull@gmx.de> wrote:
>   3. On a linux machine, run this command:
>
>   export DISPLAY=__VISTA_HOST__:0.0
>
>   4. Start a Java GUI application, on the linux machine. For example,
> use the jconsole command, from the Java JDK.
>
>   5. After the GUI is displayed on the Vista machine, lock the
> computer, then unlock it. The GUI window will become white and
> unresponsive, and one CPU core will be used up to 100%.

I had similar problems and found that starting the X Server with
 -engine 1 will help. Give it a try.


I tested, unfortunately, it doesn't work. And I just discovered that opening and closing the "About" window from the tray icon causes the same problem.

A concern is that I performed the tests using Remote Desktop. And I
just found another cygwin-xfree thread named "XWin 100% CPU usage
(Remote Desktop)" (it was on Windows 2003 Server). So Remote Desktop
might also be a factor.

Next week I will try again using a local session, but I already had
some "100% CPU" issues last week, without using Remote Desktop, so
most likely Remote Desktop is not the problem.

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