--- Log opened Wed Sep 07 01:03:31 2011
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19:41 < JUNX> hello
19:41 < JUNX> anyone here
19:41 < JUNX> i am running on rockbox for like 2 weeks now with my ipod classic
19:42 < JUNX> works fine
19:42 < JUNX> but the akku problem is somehow confusing me
19:42 < JUNX> sometimes it runns for only 1 hour or 2
19:42 < JUNX> then its running like 5 hours
19:43 < JUNX> i dont know if its a ipod problem or has anything to do with emCORE
19:54 < TheSeven> hm, it should last like 10 hours, if you're just playing back music
19:55 < TheSeven> if you skip around a lot, or navigate around your directory tree often, it will be way less because the hdd will be spinning way more often
19:56 < TheSeven> however you shouldn't be able to discharge it in less than two hours, even when the drive is spinning all the time
19:56 < TheSeven> otherwise i'd suspect that the battery is going bad
20:03 < JUNX> ye thought so also
20:03 < JUNX> yo other thing is it possible to turn the display completly off while on playback
20:03 < JUNX> to save more battery?
20:04 < TheSeven> in theory this can be done, but it hasn't been implemented yet
20:04 < TheSeven> on the classic this would only have a <5% impact anyway
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20:50 < JUNX> hm ah i forgott to ask
20:50 < JUNX> hehe
20:51 < JUNX> i bought me an fm transmitter for the ipod port but it wont work
20:51 < JUNX> so doesnt it work with the emCORE
20:51 < JUNX> or do i have to setup it first
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20:53 < TheSeven> hm, how do you configure that thing?
20:53 < TheSeven> through the ipod, or does it have its own buttons/display?
20:53 < TheSeven> if the latter, you might be able to bring it up by enabling lineout and accessory power
20:54 < TheSeven> otherwise it won't work
20:54 < JUNX> it doesnt even turn on when i plug it in
20:54 < JUNX> got own button and display
20:54 < JUNX> but stays off
20:55 < JUNX> ok and can i playback while charging?
20:55 < JUNX> is it the same with accessory power
20:56 < TheSeven> hm, accessory power should make it detect the ipod
20:57 < TheSeven> and you can play while charging, by holding the menu button while connecting the charger
20:57 < TheSeven> at some point rockbox will be able to tell computers and chargers apart by itself, but this hasn't been implemented yet for the classic
20:58 < JUNX> ok
20:58 < JUNX> i try that
21:17 < JUNX> im out cya
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21:25 < n1s> TheSeven: IIUC the classic doesn't power down the disk when it's not used, any idea how to do that?
21:26 < TheSeven> huh? that'd be weird
21:26 < TheSeven> it's supposed to do that properly
21:31 < n1s> it doesn't #define HAVE_ATA_POWER_OFF in rb but maybe it uses some other mechanism?
21:32 < TheSeven> hm, interesting
21:33 < TheSeven> it used to work at least
21:33 < TheSeven> is the hdd power control separate from the spinup/down control?
21:33 < TheSeven> if yes, i have probably misimplemented that
21:33 < TheSeven> i think my spinup/down code does the power control as well
21:34 < n1s> in rockbox it is, yes
21:34 < n1s> see firmware/drivesr/ata.c:907
21:35  * TheSeven wonders how that makes sense
21:36 < TheSeven> hm, i think i've forked that file for the classic to keep the ce-ata mess contained in the target tree
21:36 < n1s> for some disks there's a much longer delay before they're usable if powered down completely than just spun down
21:36 < n1s> and it used to be a setting in rockbox
21:37 < TheSeven> hm that doesn't seem to be the case here
21:41 < n1s> oh, the ipod6g seems to have it's own disk powerdown system in ata_thread
21:43 < TheSeven> yeah, it has a whole fork of the driver
21:44 < TheSeven> with madness like ce-ata and some experimental bad block remapping code as there are lots of drives with tons of bad sectors out there that are otherwise working fine
21:44 < n1s> oh well, guess it was too much hoping for that low hanging fruit :)
21:45 < TheSeven> :)
21:45 < TheSeven> with a spinning drive it wouldn't last 10 hours
21:45 < TheSeven> we're dealing with something more subtle here that eats away like 20mA even with the CPU sleeping and disk powered down
21:46 < n1s> i'd like to work on the power consumption but i don't really have any good way to measure and no real idea where to start
21:46 < TheSeven> on the nano2g the same thing is happening, just to a much lesser extent
21:46 < TheSeven> you can measure the USB current consumption
21:47 < TheSeven> with a fully charged battery the USB current is pretty much battery current consumption + 1mA
21:47 < TheSeven> assuming you configure the power manager to allow drawing as much current from the bus as it wants
21:48 < TheSeven> otherwise it will limit during e.g. disk spinup
21:48 < n1s> i'd need a multimeter and a usb extension cable to sacrafice
21:49  * TheSeven had an arduino with some measurement circuitry that was pretty damn accurate and did cause barely any voltage drop
21:49 < TheSeven> sadly it died just a couple of days ago :/
21:49 < n1s> after that is disassembling the OF the way to go or can the bootrom still tell anything useful about this?
21:51 < TheSeven> sadly i have no idea where this is coming from
21:51 < TheSeven> i tried to do everything like the rom does, but i might have made a mistake somewhere
21:51 < TheSeven> after all this damn power manager isn't really documented
21:52 < TheSeven> it might be some kind of deeper sleep mode that the OF uses but we don't
21:52 < TheSeven> might be worth doing some more consumption measurements in e.g. diagmode to check if that one behaves similarly
21:52 < TheSeven> as the code is comparatively simple
21:52 < n1s> could the state of things be dumped for the OF from an exploit or something?
21:53 < TheSeven> OTOH i think diagmode sleeps using busy loops :/
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--- Log closed Thu Sep 08 02:36:24 2011