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I have reopened FS#5230 for further investigation.
applying ipod_4g_button_int-variant2.patch from FS#5230 solved this issue for me. thanks.
I can't say for sure but the FS attached to it sure is all over the place.Not to mention that patch no longer matches the current file and it looks like the click wheel might have already been fixed can you attach 'your' patch to this thread?I don't have this device to test so I can't do too much with it but someone else may..
By sleeping in interrupt handler he meant busylooping. udelay(2000) is 2 ms of not doing any useful stuff. I can easily understand the objections for this patch. From the other hand https://www.rockbox.org/tracker/task/5230#comment30395 says udelay is not in hot codepath. ifdefing is an option but ugly one.
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