[vox-tech] application greyed out

[Hai Yi]

Thx all for responding - those are very informative :-)
On Dec 2, 2010 2:17 PM, "Kyle Ambroff" <ambroff at lindenlab.com> wrote:
> This is a feature of the window manager you are using, in this case
> Compiz. Many window managers and implementations implement a protocol
> called _NET_WM_PING, which is a way for one X11 client to verify that
> another is handling and responding to X11 events.
>
> Not all applications support this protocol, but most do, especially if
> they are using a fancy widget toolkit like GTK+ or Qt. An X11 client
> can give a hint to the window manager by listing _NET_WM_PING in a
> property of its window called WM_PROTOCOLS.
>
> Compiz will periodically send a ClientMessage to the target client
> using XSendEvent(), which includes a timestamp. The receiving client
> is supposed to respond immediately by sending the same message back to
> the sender.
>
> The idea is that each X11 client should have one thread that is
> processing events from the X server. If that thread is blocking
> because of deadlock, or some operation that is taking a long time,
> then it will not respond to these pings in a timely manner. If it is
> not processing these messages, it certainly isn't going to be able to
> process events from the user, so the window is considered
> non-responsive. The desaturation you see is a signal to you that the
> application isn't going to be responsive to any input.
>
> Firefox and Eclipse are both large, complicated applications that
> share a UI loop with lots of semi-trusted code. It's easy for one of
> your extensions, or JavaScript from a web page to block the UI thread.
> If you upgrade to a more recent version of Ubuntu, you'll be able to
> use FIrefox 3.6, which is *much* better at dealing with this. Or you
> could download Google Chrome :).
>
> -Kyle
>
> On Thu, Dec 2, 2010 at 8:04 AM, <timriley at appahost.com> wrote:
>>> -------- Original Message --------
>>> Subject: [vox-tech] application greyed out
>>> From: Hai Yi <yihai2004 at gmail.com>
>>> Date: Thu, December 02, 2010 4:24 am
>>> To: "lugod's technical discussion forum" <vox-tech at lists.lugod.org>
>>>
>>>
>>> hello All: I am using ubuntu 9.10, in a quite frequent fashion, I
>>> noticed that the whole UI screen of some applications just grey out
>>> after working a while, as if they are under heavy resource consuming
>>> tasks.
>>>
>>> So far, this happened to Firefox
>>
>> This happens to me when using Firefox. It seems to be a reaction
>> to the website taking too long to respond. Most likely, it occurs
>> when the website starts sending the page but then stops in the
>> middle. But this is just a guess.
>>
>> <snip>
>>
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