Canonical list of Nokia 7650 bugs (2003-07-28)

[mattbee]

Hello all,

I'm trying to track down a crash on my 7650 game which happens only after about 20-25 minutes of play :-/ I used to see an OutOfMemory exception, but not I get KERN_EXEC 3, hooray.

So just in case I've missed a bug, and for the sanity of all who pass through here in future, here's as much of a list of 7650 bugs that I can think of from the top of my head and scouring the forums, please post any more that I might have missed. I'll collect any replies, corrections or additions and post a new thread with everyone's knowledge collected in a few days.

* (firmware 4.39+) Image.createImage never relases its image memory, can't be used reliably (or is it getGraphics which does this?)

* Class.getResourceAsStream() leaks memory every time it's used? At least a tight loop of getResourceAsStream calls causes a KERN_EXEC 3.

* InputStream.skipBytes() throws a NullPointerException occasionally-- can't be relied on to work. AFAICT between this and the previous bug you can't reliably open and close files during the normal running of an application (seems okay during initialisation though).

* Switching between FullCanvas objects using Display.setCurrent causes a white flicker, must work around by only ever using a single FullCanvas object.

* Playing tones doesn't work at.

* HttpConnection bug? I know there is one, I just don't know anything about it since I've not had to use it.

Any corrections, additions etc. welcome.

[abickerton]

The 7650 & 3650 both share the Image.getGraphics() bug.

more info can be gleaned from ....

Technical Note: Known Memory Issues with the Nokia 7650

document found on this very site.

[handful]

You can play tones in the 7650.
You should use a converter tool to create a tone from a midi file.

I used, tested, and it worked fine.!

*I am using the nokia developer suite converter to do that and playing with the Sound class of the nokia API

[mattbee]

re: tones I was under the impression that new Sound(int a, int b) didn't work as expected.

[yowchuan]

Nice list, Mattbee, will be very useful for all de-"buggers"!

Thanks alot!

Cheers
YC

[kisember]

Here is another about Commands:
http://discussion.forum.nokia.com/fo...threadid=23913

[kisember]

This message is just for keeping this thread alive.

[trickybit]

A couple more:

I've seen these, and seen them on this forum :
- using FullCanvas, clip region passed to paint() isn't full sized.
- drawString() to an offscreen image ignores setColor()

From this forum, but I haven't tried:
- hideNotify/showNotify called, but not pauseApp/startApp (resume)
- http hangs soon if network gateway not changed to 0.0.0.0 [reported]
- Game extension drawPixels() is slower than drawImage()
- http can't handle chunked responses.
reference: http://www.sourceress.net/s60chunked.html
- pause for phone calls causes hang.
even using hideNotify/showNotify
workaround is to check Displayable.isShown() on
every entry point (!)


I haven't seen this one posted:
- using FullCanvas, repaint(int,int,int,int) for a subregion is not reflected in clip region subsequently passed to paint.

[Onib]

When I run close on HTTPConnection, the connection
is not freed. So if I run several HTTPConnections,
eventually the phone will crash as it encounters the limit
of connections.

But if I set the connection to null, the system will free the
connection properly.

I am not aware how quickly carbage collection will take care
of the connection, so you still could have a problem if you
establish many connections in a short period of time, like in
a single loop inside a function.

[trickybit]

On my 3650:

The keyReleased event is not generated for the "pencil button" unless you hold it down until the first keyRepeated event occurs.

Cool, eh? The rest of the keys work OK in this regard.

jim

[tuttas]

Is there also a bug in the 7650 firmware, that Sound.init() or the Sound constructor did'nt work to simply play a tone ?

On my Emulator it workes fine but not on a real device !

best regards

Joerg Tuttas

[kisember]

artblanc found another one.
It's not a JVM bug, but an AMS bug (MidpUI).
If you specify a MIDlet-n attribute like this:
MIDlet-1: anyname, anyicon , anyclass
(icon is without leading slash and without extension), AMS will not able to show installed midlets anymore.
You don't need to run, just install.
Solution:
Use any file-manager, find the midlet in the c:\system\midp folder, and delete the midlet

[m_c_young]

Here's another:

RecordEnumeration re = <created however>
int id = re.nextRecordId();
boolean hasPrev = re.hasPreviousElement()

Variable hasPrev is null in some circumstances so you can't do a loop of the form below to get all record along with their ids..

while( re.hasNext() )
{
  id = re.nextRecordId();
  re.previousRecordId();
  doSomething( re.nextRecord(), id )
}