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#rockbox log for 2025-02-04

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07:59:05 Join OlsroFR [0] (OlsroFR@user/OlsroFR)
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08:00:21OlsroFRHello all. Last friday, I met Slackware (user890104) in the FOSSDEM in Brussels. He tinkered my ipod mini/4th gen mono to add a LED of storage power to help debugging it. It appeared that we could see on the mini that the LED was not shutting down completely (backfeeding), only on Rockbox.
08:00:34OlsroFRAfter a lot of hours of work and benchmarking, here's a patch: https://gerrit.rockbox.org/r/c/rockbox/+/6367
08:01:09OlsroFRThis patch does not only improve battery life, but also fixes stability issues on wake up which plagued all these iPods: 4th gen mono, minis, 4g photo
08:01:38OlsroFRthese ipods were not working when SD-modded: they crashed (paniced) at each wake up
08:03:12OlsroFRI also want to submit an additional power management related patch: https://gerrit.rockbox.org/r/c/rockbox/+/6368 this patch allows to shutdown the disk faster on flash storage since they don't have any significant spin up time anyway
08:03:44OlsroFRmany thanks to user890104, without the LED mod, debugging would have been too hard on this issue
08:05:18OlsroFRWith this patch, battery gets x3 better with old iPod models. An iPod Mini 2nd gen iFlash modded can now get more than 20 hours of battery life on Rockbox :)
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08:25:08XogiumOlsroFR: so your ipod was never shutting down completely ?
08:25:26OlsroFRstorage power, it's a known problem with these ipods since a long time
08:25:43Xogiumah so the storage was never going down
08:25:48OlsroFRthis problem was "fixed" in the past to get more stability by never shutting down the storage power at all, but battery life was terrible
08:26:06OlsroFRa mini 2nd gen could last only around 6h30 with storage constantly on
08:28:09Xogiumouch
08:28:23Xogiumbut video doesn't have this, correct ?
08:34:01OlsroFRclassics have no issues too
08:34:13Xogiumnice
08:34:34XogiumI hesitate getting the iflash solo this month yet
08:35:23Xogiumit'd cost like 52 euros in total. Ouch. And I don't know how the shipping from the UK to france is like, and what sort of custom fees to expect
08:57:10Xogiumgood thing though is I got the battery replacement on the way, so there's that
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10:02:38_bilgus_OlsroFR, very nice does this then not still have stability issues?
10:04:06OlsroFR_bilgus_ I made tons of non regression tests, including using the patches in a mechanical 4GB microdrive iPod Mini + 20GB 4th gen mono mechanical drive. I tested accessories too (FM radio remote buttons), volume power, buttons, screen, etc.
10:04:12OlsroFRI've made battery benchmarks too
10:04:26OlsroFRThe 4th gen mono ipod has the sketchy red SD-CF adapter + green board + 64GB SD card
10:04:30 Join WebGuest89 [0] (~WebGuest8@102.18.94.252)
10:04:45OlsroFRThe ipod mini 2nd gen had an iFlash CF + 256GB sd card
10:05:06OlsroFRboth could play music for hours without any kind of crash or oddity, just like modern iPods
10:05:24OlsroFRno crash anymore + battery life multiplied per 3
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10:07:11OlsroFRthe patch could not be tested though on ipod mini 1st gen and ipod photos, but these ipods are known to had the exact same problems with SD card so I expect this patch to work for them. Any more testing from someone that has these devices is welcome, of course
10:09:52_bilgus_So more stable due to the storage driver changes or is the gpio change helping there too?
10:10:42OlsroFRhttps://gerrit.rockbox.org/r/c/rockbox/+/6368 this patch is just some kind of "bonus" to shut down the storage quicker. But it has no impact on stability, the aim on this patch is just to extend battery life
10:11:03OlsroFRhttps://gerrit.rockbox.org/r/c/rockbox/+/6367/1/firmware/target/arm/ipod/power-ipod.c this is the patch that has an impact for old iPods
10:11:19OlsroFRSetting up the GPIO changes is what fixed stability issues + battery issues on these models
10:11:40_bilgus_oh so it does directly affect stability then
10:12:04OlsroFRYes. Before that patch, they had the famous transfer sector error "PANIC!" at each wake up
10:12:10OlsroFRmaking them unusable
10:12:23OlsroFRreal CF cards or hard drive didn't have that error, though.
10:12:45_bilgus_extra cool!
10:12:51OlsroFRFor SD cards, on these old models, the popular fix https://www.reddit.com/r/ipod/comments/1bomyfn/success_rockbox_running_smoothly_on_512gb_ipod/ was to do this which means never even try to shut down the power at all
10:13:21OlsroFRthis fixed stability issues at the cost of insane power consumption. I benchmarked an ipod mini 2nd gen this way and it was stable but could last only 6H30
10:13:52OlsroFRwhile my patch adding the correct GPIO does not only fix stability, but also fix battery life because it respects the whole "shut down" logic common code base from the ata driver logic
10:14:47OlsroFRthe only caveats of my patch is that there is a small risk that it will not work or not be enough for ipod minis 1st gen and ipod photos. I just don't know: I don't have the devices.
10:15:19OlsroFRI just could read here and here that they behaved the same regarding stability issues with SD card modding
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10:39:37_bilgus_Yeah testing on device is the only way to know for sure
10:40:50OlsroFRThe patch was heavily tested on what I own, though. 4th gen mono and minis 2nd gen runs like a dream now :)
10:45:09_bilgus_should make a lot of people very happy :)
10:45:58OlsroFRwhen the word will spread, for sure. Right now they got the reputation to be problematic devices with Rockbox. I will help for that by making reddit posts showing off my devices Rockboxing with many songs.
10:46:21OlsroFRI just put a 1TB microSD card that was laying around, on my mini ;) I will do tests tomorrow when all my songs will be copied
10:47:37OlsroFRlooks like on Reddit almost all owner of these devices were keeping them on Stock OS for safety. Rare users though used old patch and accepted poor battery life to get all the goodness rockbox provides, they will be happy once they hear they can just update to get the fixes from the main branch
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