iPod 5G freezes after about 30 minutes of playing

[Cagnulein]

Hi guys, i've installed my first rockbox version ( r16095-080117 ) on my iPod 5G.
From when i've installed it, after about 30 minutes of playing, it hangs up with this error:
Undefined Instruction
at 000068DC4 (0)

here you can find my config. If you need other info please tell, i really really want to resolve it
Thanks

[MarcGuay]

A quick search of the forums with "Undefined instruction" reveals a plethora of reasons this could happen along with possible fixes, such as:

Rebuild the database, remove the embedded album art from your files, chew your food properly, etc.

It might also help to say what format the files are in (mp3, m4a, wma, etc) and if the problem reccurs in the same song or if it's random.

[pixelma]

Cagnulein, do you have a 30GB Ipod or one with a 60 or 80GB disk?

There are two builds for the Ipod Video (or 5th generation) and if you have the model with the smaller disk it is important that you use the right one.

[Cagnulein]

A quick search of the forums with "Undefined instruction" reveals a plethora of reasons this could happen along with possible fixes, such as:

Rebuild the database, remove the embedded album art from your files, chew your food properly, etc.

It might also help to say what format the files are in (mp3, m4a, wma, etc) and if the problem reccurs in the same song or if it's random.

i haven't a database, i'm playing directly from files section. They are all mp3 files and they have embeedded album art. How can i turn off the loading?

Cagnulein, do you have a 30GB Ipod or one with a 60 or 80GB disk?

There are two builds for the Ipod Video (or 5th generation) and if you have the model with the smaller disk it is important that you use the right one.

i've a iPod with 80gb hard disk...

[AlexP]

Does it do this reliably, i.e. every time?

The actual difference between the two iPod videos as far as rockbox is concerned is actually memory size - either 32 MB or 64 MB.  It just so happens that those with 30 GB disks have 32 MB, and 60/80 GB disks 64 MB.  However it is not unknown to get a larger disk with smaller memory (although very rare).  

You might try the 30 GB version to see if it helps, although I think 30 mins is a long time for it to run were this the problem.  However, as pixelma points out to me, 30 minutes is roughly 30 mb at 128kbps mp3.  Still, it can't hurt to try.

[MarcGuay]

and they have embeedded album art. How can i turn off the loading?

From what I understand you have to actually delete them from your MP3s, I could be wrong though, maybe someone with experience can confirm?

[Cagnulein]

Mmm..i'll try these workarounds in the next week...i'll keep in touch

[Cagnulein]

You might try the 30 GB version to see if it helps, although I think 30 mins is a long time for it to run were this the problem.  However, as pixelma points out to me, 30 minutes is roughly 30 mb at 128kbps mp3.  Still, it can't hurt to try.

today i was running for 45 minutes playing a 192 kb/s mp3 folder without problem: album art isn't in every file...i was thinking about looking in the source code for the "album art loading function" and trying to comment it out...

another question, could it help if i turn the "debug mode" on?

[AlexP]

Which debug mode?  Also, please do not double post.

[Cagnulein]

i've noticed a "debug item" in MainMenu->System...isn't it?
Sorry, it isn't my intention to do a double post, i thought about mail notification...

[MarcGuay]

i was thinking about looking in the source code for the "album art loading function" and trying to comment it out...

I'm pretty sure no such thing exists because there's no support for embedded album art - Rockbox just seems to choke on it when it's present.  I suggest you run some tests with files that DO contain album art and see if that's when your player freezes up, and if it is, either remove the embedded art from your files or stop playing them.

Have you tried the other iPod video build as others suggested?

[AlexP]

i've noticed a "debug item" in MainMenu->System...isn't it?

No, that is a menu where you can look at various useful bits of information such as buffer levels etc.  There is no debug mode to turn on.

I believe it is fairly easy to disable album art, there is something like a HAVE_ALBUM_ART define IIUC, although I haven't looked at the code.  Nico_P on IRC is your album art man.  However that won't help with any problems coming from having embedded album art, as as MarcGuay says rockbox does not support or try to use embedded album art anyway - the problem is in the metadata reading code that chokes if it is too large.

[Cagnulein]

Have you tried the other iPod video build as others suggested?

Not yet, because the "yesterday try" seems to point the direction through the album art issue (45 min of 220 kb/s mp3 are > of 32/64 MB isn't ? )

Mmm...at this point would be great if i could find a file that causes the problem every time i play it...

[AlexP]

I would say your memory is indeed 64 mb if you get to 45 minutes @ 220 kbps.  Which bootloader are you using?

[Cagnulein]

i'm using this one.
Is it relevant? I've also installed iPodLinux