Support and General Use > Hardware

Memory access noise on Clip+

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saratoga:
Your player maybe too new a hardware revision to support such an old build.

Gunbuster:
So I bought a brand new clip+ from Amazon, I rockbox it right out of the box with the latest stable (3.13) play a song and I can hear the "BZzzzzZZZBvbzZZZzzz" of the buffer being filled up so I'm a little astonished to say the least...

... But I'm not done yet, so I put 3.7 on the clip+ and guess what, it's dead silent now !

Tbh I can still hear a very little tiny sound that I couldn't hear with my 2 years old refurbished device, but it's still like 100 times quieter than the newer firmwares, I could never record that sound like I did with the 3.13 release.

At this point it can't be an accident, something definitely changed that broke rockbox at least on the clip+ since the 3.8.1 release.

gevaerts:
If I read this thread correctly, you said it was also silent with 3.8, but not with 3.8.1?

If so, http://git.rockbox.org/?p=rockbox.git;a=commit;h=d1fdb485b12676dc99db29ee9f9900c9c752c124 is almost certainly involved. If the commit message is correct and doesn't omit anything, that means it's one of

* http://git.rockbox.org/?p=rockbox.git;a=commit;h=1675e98925fb976314c199116e37ed81e98ca530
* http://git.rockbox.org/?p=rockbox.git;a=commit;h=3d3c0c51ec4e30a961cab311c17ddeab5c5c6a18
* http://git.rockbox.org/?p=rockbox.git;a=commit;h=fc0ad4c01ec938e11fbcfcb8d6a517bf50922a35
* http://git.rockbox.org/?p=rockbox.git;a=commit;h=d3c796d20e4bd8e15f18a0dac2e9c4283df5740b
* http://git.rockbox.org/?p=rockbox.git;a=commit;h=2543340bf4ee69f9005b14e5fb335187125a5e94
* http://git.rockbox.org/?p=rockbox.git;a=commit;h=6512f0fb522144b121c38c53ea780c939b6e027c
* http://git.rockbox.org/?p=rockbox.git;a=commit;h=502e9e97b6c91999e6d0d92802e59d13d8ffc9de
* http://git.rockbox.org/?p=rockbox.git;a=commit;h=86c4ec7277ac1c2a130a9ac1a3500c8360af5c7e
* http://git.rockbox.org/?p=rockbox.git;a=commit;h=7d74fdec020d1f54f0cab318c595d34dd2dc1a0c
* http://git.rockbox.org/?p=rockbox.git;a=commit;h=5c4c691cd3465c3cbca83581aa079648fa2d8d04
* http://git.rockbox.org/?p=rockbox.git;a=commit;h=8351a1aa9db98bab1f66274ee7b7e33839a31c60
* http://git.rockbox.org/?p=rockbox.git;a=commit;h=eab630a1e1463be244118613537f6a04d290f5e0
Now, I'm not an sd specialist and I don't have a clip+, so I can't verify much of this, but someone who knows the ams sd driver should be able to work with that information

Gunbuster:
Yes I can certify with 100% accuracy that both of my devices are not affected with 3.7 and 3.8, well it is to a certain extent,  it appears that it can vary from devices to devices as I can still hear a tiny sound with the new device that I couldn't with the old one (it may still be present though, I just can't hear it)

But it's not even close to what I can hear with newer firmwares since 3.8.1.

Thank you for your research on this issue and I hope it can help someone resolving it.

I wish I could help more.

bertrik:
IMO, the most likely candidates are (most suspicious first):
* http://git.rockbox.org/?p=rockbox.git;a=commit;h=5c4c691cd3465c3cbca83581aa079648fa2d8d04
* http://git.rockbox.org/?p=rockbox.git;a=commit;h=8351a1aa9db98bab1f66274ee7b7e33839a31c60
* http://git.rockbox.org/?p=rockbox.git;a=commit;h=7d74fdec020d1f54f0cab318c595d34dd2dc1a0c
* http://git.rockbox.org/?p=rockbox.git;a=commit;h=eab630a1e1463be244118613537f6a04d290f5e0

Can you try this rockbox build (it has 5c4c691cd3465c3cbca83581aa079648fa2d8d04 reverted)?
https://docs.google.com/file/d/0ByItZAj1MynOUHpndW0yTmMydVk/edit?usp=sharing
Select File/Download on the top left, save the rockbox.zip file and unzip over your existing installation on the clip+, such that it overwrites the files in <your-clip+-drive>:/.rockbox

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