Qt-interest Archive, May 2007
A lot Xlib errors
Message 1 in thread
Hi,
I got these X errors in my apps,it's not always appears,and seems not
appears in gdb( I have
try to gdb it for a few times to find which operation causes this,but
unfortunately ( or fortunately?) it doesnt happens.
Well,what typical errors would make these X errors?
regards
X Error: BadIDChoice (invalid resource ID chosen for this connection) 14
Major opcode: 53
Minor opcode: 0
Resource id: 0x310008
X Error: BadDrawable (invalid Pixmap or Window parameter) 9
Major opcode: 66
Minor opcode: 0
Resource id: 0x1e0034b
X Error: BadDrawable (invalid Pixmap or Window parameter) 9
Major opcode: 70
Minor opcode: 0
Resource id: 0x1e0034b
X Error: BadDrawable (invalid Pixmap or Window parameter) 9
Major opcode: 70
Minor opcode: 0
Resource id: 0x1e0034b
X Error: BadDrawable (invalid Pixmap or Window parameter) 9
Major opcode: 151
Minor opcode: 4
Resource id: 0x1e0034b
X Error: BadPixmap (invalid Pixmap parameter) 4
Major opcode: 56
Minor opcode: 0
Resource id: 0x1e0034b
X Error: RenderBadPicture (invalid Picture parameter) 173
Major opcode: 151
Minor opcode: 7
Resource id: 0x1e0034c
X Error: BadPixmap (invalid Pixmap parameter) 4
Major opcode: 54
Minor opcode: 0
Resource id: 0x1e0034b
Xlib: unexpected async reply (sequence 0x40ec)!
X Error: BadDrawable (invalid Pixmap or Window parameter) 9
Major opcode: 66
Minor opcode: 0
Resource id: 0x1e0034b
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Message 2 in thread
On Tuesday 15 May 2007 11:58:26 jiang jefix wrote:
> Hi,
> I got these X errors in my apps,it's not always appears,and seems not
> appears in gdb( I have
> try to gdb it for a few times to find which operation causes this,but
> unfortunately ( or fortunately?) it doesnt happens.
> Well,what typical errors would make these X errors?
Sounds like you could be hitting this problem:
http://www.trolltech.com/developer/task-tracker/index_html?id=146956&method=entry
Do any of the workarounds mentioned in the task work for you?
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Message 3 in thread
Hi,
> I got these X errors in my apps,it's not always appears,and seems not
> appears in gdb( I have
> try to gdb it for a few times to find which operation causes this,but
> unfortunately ( or fortunately?) it doesnt happens.
> Well,what typical errors would make these X errors?
Are you using threads in your application?
You may be using GUI elements (QWidget, QPixmap, etc. in a secondary thread.
You cannot do that. Always use GUI elements from the main (GUI) thread.
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Message 4 in thread
Yes,I using thread to do backend_time_consuming_func(),and from that func
will time after time emit signal to main(Gui),this signal contains a int value
And main(GUI) update some string according this value;
The frequency is not fixed,Min less than 10 times per 1 sec,Max
1000times per 1 sec
2007/5/16, Dimitri <dimitri@xxxxxxxxxxxxx>:
> Hi,
>
> > I got these X errors in my apps,it's not always appears,and seems not
> > appears in gdb( I have
> > try to gdb it for a few times to find which operation causes this,but
> > unfortunately ( or fortunately?) it doesnt happens.
> > Well,what typical errors would make these X errors?
>
> Are you using threads in your application?
>
> You may be using GUI elements (QWidget, QPixmap, etc. in a secondary thread.
> You cannot do that. Always use GUI elements from the main (GUI) thread.
>
> --
> Dimitri
>
> --
> To unsubscribe - send a mail to qt-interest-request@xxxxxxxxxxxxx with "unsubscribe" in the subject or the body.
> List archive and information: http://lists.trolltech.com/qt-interest/
>
>
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Message 5 in thread
On 16.05.07 08:55:08, jiang jefix wrote:
> Yes,I using thread to do backend_time_consuming_func(),and from that func
> will time after time emit signal to main(Gui),this signal contains a int value
> And main(GUI) update some string according this value;
> The frequency is not fixed,Min less than 10 times per 1 sec,Max
> 1000times per 1 sec
IIRC you're using Qt4 right? If so make sure that you do the connect
using the Qt::QueuedConnection type, possibly stating it explicitly as
5th parameter to connect.
Andreas
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Message 6 in thread
i use qt3.3.6
2007/5/16, Andreas Pakulat <apaku@xxxxxx>:
> On 16.05.07 08:55:08, jiang jefix wrote:
> > Yes,I using thread to do backend_time_consuming_func(),and from that func
> > will time after time emit signal to main(Gui),this signal contains a int value
> > And main(GUI) update some string according this value;
> > The frequency is not fixed,Min less than 10 times per 1 sec,Max
> > 1000times per 1 sec
>
> IIRC you're using Qt4 right? If so make sure that you do the connect
> using the Qt::QueuedConnection type, possibly stating it explicitly as
> 5th parameter to connect.
>
> Andreas
>
> --
> Try the Moo Shu Pork. It is especially good today.
>
> --
> To unsubscribe - send a mail to qt-interest-request@xxxxxxxxxxxxx with "unsubscribe" in the subject or the body.
> List archive and information: http://lists.trolltech.com/qt-interest/
>
>
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Message 7 in thread
jiang jefix schrieb:
> i use qt3.3.6
In Qt 3 no asynchronous signals are supported - you need to send a
custom event into the Qt event queue (use QApplication::postEvent()
which is thread-safe) from your worker thread.
The main (GUI) thread picks up this custom signal and can then safely
update the GUI.
Again, you must *not* change GUI elements from any other thread than the
main (GUI) thread.
Cheers, Oliver
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Message 8 in thread
Till Oliver Knoll schrieb:
> jiang jefix schrieb:
>> i use qt3.3.6
>
> In Qt 3 no asynchronous signals are supported - you need to send a
> ...
> The main (GUI) thread picks up this custom signal [...]
^^^^^^
I meant custom event off course ;)
Cheers, Oliver
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