Latest Rockbox not working on Nano

[soap]

The PP chip is not being overclocked  it is speced for 32 KHz - 80 MHz.

As a reminder, as it seems some have forgotten this, but the problem doesn't seem to be solely based on temperature.  A few of us have gotten our nanos hot enough that it is too hot to touch, and they still haven't acted up.

I agree that there appears to be little evidence that Nanos which don't exhibit the problem are temperature sensitive.
What I am curious about is if all Nanos which /do/ exhibit the problem are also temperature sensitive.

[embrion]

I agree that there appears to be little evidence that Nanos which don't exhibit the problem are temperature sensitive.
What I am curious about is if all Nanos which /do/ exhibit the problem are also temperature sensitive.

Well,

I'd like to say, that after 5 minutes in refrigerator my Nano works for 20 minutes on the latest build well.

so it seems that problematic Nanos are also temperature sensitive

[Chronon]

embrion, a single anecdote does nothing to prove that all Nanos that exhibit the problem are temperature sensitive.  It may or may not turn out to be the case, but a single anecdote surely does not support the conclusion you are trying to make.  It's like saying, "I have a red apple: Therefore, all apples are red."

[Llorean]

As well, after five minutes in the fridge, your Nano would most likely return to the same temperature it gets to after booting from room temperature in far, far less than 20 minutes.

[soap]

As well, after five minutes in the fridge, your Nano would most likely return to the same temperature it gets to after booting from room temperature in far, far less than 20 minutes.

Unless the chip suffering from heat isn't in the PP SoC.

[Llorean]

Yes, but if it goes nearly immediately from "Room temperature" to "Too hot to function" as of our recent changes, and never ever reached "Too hot to function" prior to these changes, it should go from "Quite cold" to "Too hot to function" in an amount of time shorter than 20 minutes, I would expect.

Of course, I can't test this hypothesis anyway.

[tvg]

As well, after five minutes in the fridge, your Nano would most likely return to the same temperature it gets to after booting from room temperature in far, far less than 20 minutes.

That's not true. Back metallic plate remains cold for near 20 minutes laying on wooden table.

And if you don't believe that apples are red, just check it - put an Ipod to a refrigerator. Of course, it must be problematic ipod.

At lease it can be assumed, that the part of Nanos have anoter temperature flow inside.

[Llorean]

The back metallic plate also is not the problematic part, and does not have current running through it providing a significant amount of energy with which to generate heat...

Your hypothesis is that it can go from "Room temperature" to "Hotter than it's ever gotten before" in a very short time, but not from "Cold" to "Hotter than it's ever gotten before" in less than 20 minutes, despite the fact that we're obviously heating it up (according to you).

Let me ask: How long does it take, holding it in your hands, to go from "Cold" to "Hand temperature"?

[WauloK]

Just to jump on the bandwagon with everyone else.. Test1 seems to fix problems I've mentioned in the other threads here, for my iPod Nano 1G 2Gb.

[tvg]

Llorean, in my hands? How tight should I touch it?

I could say, how long it takes to warm up from the refrigerator to 'not cold condition' at room temp. = 20 degrees.

Also back metallic plate owns high temperature capacity and, if in contact with electronics, it could slow down the process of changing the temperature of it.

[Llorean]

My point was that you're making a faulty relationship.

If you leave an iPod Nano sitting in Room Temperature, you're not actively adding energy to the backplate. The only thing affecting the temperature change is sitting in the room.

If you're running current through a microprocessor, it heats up. Fairly quickly. Turn on your PC from a cold start, run your CPU at 100%, and see how long it takes to heat up. The backplate is not having current run through it, so even if the microprocessor heats up, it still may be quite some time before you feel the back plate at the same temperature.

My point is that you should use some scientific method in your experimentation rather than making assumptions. Correlation does not imply causation.

Why not use a thermometer to actually measure component heat in your Nano? If it goes from "Room temperature" to "Too hot" almost immediately, then a great deal of heat is added.

Another important fact: FLAC has LESS boost ratio than MP3. This means that FLAC runs the core processor cooler than MP3, and yet for many people FLAC is more problematic, not less as your theory requires it must be.

Please, look at all of the evidence, and perform structured testing, rather than trying to make leaps. While it clearly runs better for some people cooler, this doesn't mean that we're generating significantly more heat, it only means that "certain hardware performs better cooler", not strictly "we're making it too hot".

For example, in a hypothetical example, if something can be updated 60 times per second "cold" and 50 time per second "hot", and your code previously updated at 45, and moves to 55, it doesn't need to be operating at a new temperature to experience problems if it was always "hot" before, but if you cool it these problems will vanish despite a lack of change of original operating temperature. Which means that the problem is in how fast we update it (in this hypothetical situation) but a lept to conclusion could be that we make it too hot, since cooling seems to fix it.

So please, PLEASE, investigate thoroughly from every angle, rather than making any assumption. Even if it's right, PROVE that it's right, rather than simply assuming it is, by figuring out what's actually going wrong. Even if it's overheating, we need to know WHY it is.

[aressto]

when trying to play mp3 file, ipod nano 2gb says:

Undefined instruction at 40003934 (0)

and freezes

using

iPod Nano 1st gen
r14976


tryed different releases for a 3-4 days, same thing

Would you please recomend stable release and where to download it

[aressto]

i tryed one by one rockbox-ipodnano-20070904.zip
rockbox-ipodnano-20070905.zip
rockbox-ipodnano-20070921.zip
rockbox-ipodnano-20070925.zip
rockbox-ipodnano-20070926.zip << mp3 sounds like dialup modem if you pick up the phone
rockbox-ipodnano-20070928.zip << this one freezes

from http://www.rockbox.org/dl.cgi?bin=ipodnano

and there is no such an error (except ones that i marked)

BUT

all mp3 tracks playing with every seconds artifacts, like mp3 is crapped . But i checked mp3s on other ipod with rockbox (5th gen 80gbs) everything is ok.

Please, advice stable release then. where i can download it?

i heard that its previouse from 1401, but i cant find such a thing in the archive, please, upload!

[GodEater]

Please don't double post.

[tvg]

Llorean, you are right.
Next days I'll manage an "experiment" with clock timer. Unfortunately, I can't disassebmle it.