IRC log for #neo900 on 20141014

00:40.24DocScrutinizer05excellent approach and notion :-)
00:43.34OksanaGood bye, I am trying to free some memory for resource hungry application :) Firefox is incompatible with this goal.
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01:45.45OksanaWarranty?.. You are offering warranty?
01:57.17DocScrutinizer05sure, at very least according to European standard, which is 6 months for all failures caused by manufacturer
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02:06.33OksanaGood :)
02:31.49DocScrutinizer05and since we are proud of our product, we will provide service to make sure you also enjoy using it for many years. This not only involves the obvious full documentation we provide, so you could do (or order) repairs at any decent repair shop, we also will provide spare parts and probably even repair service.
02:32.36DocScrutinizer05keep in mind this project wasn't started to make money, but to get one of those devices in our own hands since it's what we want to use
02:33.19DocScrutinizer05we're not interested in selling as many as possible for as high a price as possible, and start all over with next version after 6 months
02:34.30DocScrutinizer05we plan how we can extend livespan of the device/product, rather than planning for its obsolescence so we could sell the next version
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02:48.24DocScrutinizer05(spare parts) heck, I provided spare parts for backup battery of N900 already :-D
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02:51.02DocScrutinizer05http://talk.maemo.org/showthread.php?t=90864
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03:04.36OksanaThanks! I wonder, how are you going to provide repair service? Do you have contact with worldwide network of decent repair shops?
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03:17.00OksanaThat's an unique opportunity - to use the data gathered from extensive user-base of N900, to not repeat the same mistakes in Neo900. Most companies do not see the appeal of re-iterating the same device as a second batch :) Probably because they have too large batches.
03:29.58DocScrutinizer05no worldwide network of repair shops. We only could offer that service in one location
03:30.11DocScrutinizer05even Nokia did
03:30.16DocScrutinizer05basically
03:31.49DocScrutinizer05their worldwide network of Nokia care point shops also just sends in devices to a central repair facility, unless it's a very simple repair that basically every mediocre electronics craftsman could do
03:32.10DocScrutinizer05ok, they may have one repair center per country
03:32.34DocScrutinizer05Neo900 UG cannot do anything faintly similar to that
03:33.00DocScrutinizer05but at least we can offer repair when user sends in defect device
03:33.49DocScrutinizer05when we have to handle warranty, we also should be able to handle repair, right?
03:34.49DocScrutinizer05after all they differ only in the who's_paying_it question
03:36.37OksanaThanks :) I have not seen a repair shop yet which would agree to repair N900. So the offer is welcome. Shipping is ... time-and-money consuming, but it is good to have the option.
03:49.44DocScrutinizer05charging #30 #31 #32
04:09.10Oksana:)
04:41.22jonwilI had my N900 replaced under warranty twice, first time was a broken cable for the front camera and LED and for that they sent it to some central location before deciding it was cheaper to give me a new N900 than to fix it
04:41.40jonwilFor the second one, it was the dreaded busted USB port and for that they just replaced in without sending it off
04:41.52jonwilprobably because they had an entry in their database telling them that's what they do
04:43.37OksanaIt was under warranty :) I do not remember when my N900's warranty ended. Is there a way to check it?
04:45.31jonwilit seems these days that most so-called "repair shops" can't do anything beyond simple crap like replacing the cracked screen on an iPhail or a Galaxy S
04:46.48jonwilmost of them seem more interested in selling 1000 different styles of phone case
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04:59.53OksanaNod.
05:01.17OksanaI studied in one place: cases are split almost evenly between iPhone (4,5,6,?), and Samsung (Galaxy), with occasional HTC or something else. No Nokia. 'Universal case' is a unicorn they have never seen.
05:12.04jonwilI would give anything to find another case for my N900 (not the pouch kind that you put the phone in when you aren't using it but the kind you can use to protect the phone in use)
05:31.32OksanaEBay still has some?
05:31.58OksanaNot Otterbox, though, I think...
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06:43.21DocScrutinizer05batch #17-#32 finished. All 16 charged
06:46.51DocScrutinizer05wonders about how to define "swollen"
06:48.48DocScrutinizer05anywway only one of batch2 fits into my 5.6mm caliper ruler
06:49.29DocScrutinizer05not many are "manually noticeably" swollen though
06:50.04DocScrutinizer05maybe I should define "swollen" as "compressible"
06:50.44DocScrutinizer05a good LiIon cell should feel rigid and not soft or elastic
06:53.05DocScrutinizer053 of batch2 are clearly elastic like a bicycle tire at 6ATM
06:54.31x29ai think a common test for batteries is "if put on table and rotated, does it spin? yes -> swollen -> danger"
06:54.44DocScrutinizer05nice :-)
06:55.23x29athen again, the batt of my siemens s45 cracked the backlid open and still works, so hey ;)
06:56.01DocScrutinizer05"still works" and "danger" are not mutually exclusive
06:56.16x29atrue dat
07:00.23DocScrutinizer05ta PP
07:05.00DocScrutinizer05HAH! 2 out of 3 devices show emerg chrg steady amber, without battery inserted
07:06.10DocScrutinizer05time to check voltage on battery cntact blades
07:07.24DocScrutinizer053.47V
07:08.05DocScrutinizer05I wonder if that's the voltage where modem starts acting up
07:09.14DocScrutinizer05I mean, it doesn't look like APE CPU does anything at all. OTOH the system nust pull some power, or the bq24150 wouldn't sustain emerg chrg state
07:09.34DocScrutinizer05s/nust/must/
07:21.58freemangordonjonwil: https://gitorious.org/pulseaudio-nokia/pulseaudio-nokia/commit/46859348c093c23aeb6554742bdb7e522f00470d :)
07:22.34jonwilgreat
07:22.39jonwilkeep up the good work :)
07:22.48jonwilThe way things are going we will have this done in no time :P
07:24.09freemangordontoldya :P
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07:28.14jonwilAll the ARM FPU and Neon assembly is going to be a pain though
07:28.24jonwilunless you happen to know a lot more about how to RE that stuff than I do...
07:29.56freemangordonjonwil: REin NEON stuff by using NEON intrinsics is not that hard
07:30.18freemangordoncompare what I pushed to what IDA gives you
07:31.11jonwilyeah I can see how it could be fairly simple given that neon intrinsincs are basically almost a 1:1 mapping to the instructions underneath
07:31.21jonwilat least if they are anything like the SSE intrinsincs I am used to on x86
07:31.55freemangordonthey are exactly like MMX/SSE
07:33.00freemangordonis afk
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07:48.33DocScrutinizer05What The Heck?! batch3 (#33 - #48) are all but one NOT swollen
07:48.56DocScrutinizer05I.E. all fir into 5.6mm caliper
07:48.59DocScrutinizer05fir*
07:49.14DocScrutinizer05o.O
07:49.21DocScrutinizer05fit*
07:50.52DocScrutinizer05which makes me wonder if those batt packages not only got stored away for 3 years, but also at significantly different locations with different conditions (temperature comes to mind)
07:52.25DocScrutinizer05I should test voltage for batch3
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07:58.11DocScrutinizer050.00V as usual, for all
08:01.41DocScrutinizer05x29a: your shipping addr is bogus
08:02.14DocScrutinizer05which isn't a problem yet since we won't ship tomorrow, and not to the PP addr
08:02.21DocScrutinizer05just saying
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08:46.13DocScrutinizer05dang, my PPSU does ignore I-max setting of 0.1 and 0.0A, both result in 0.22A output
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10:42.53DocScrutinizer050.22A according to PPSU. Prolly I should check it with a DMM
10:44.02DocScrutinizer05when I set voltage to 5.0V, the PPSU says it is delivering a metered 04.92 and my DMM says it's actually 04.97
11:40.44wpwrakpsu-internal measurements are often quite shitty (well, maybe not in the really high-end critters. but then, who has that sort of $$$ ? :). and things get really bad for small values
11:43.34wpwrakbut the real benchmark is not static operation. things can get rather interesting with dynamic load changes. if you have relays clicking in your psu when you cross certain voltages (in CC)/currents (in CV), then try exercising it across that border at a few Hz. some psus get completely lost then.
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12:05.50DocScrutinizer05no relays in this PSU
12:06.57DocScrutinizer05it's just a rather "complex" SPSU with an atmel32 on a second PCB
12:08.09DocScrutinizer05found a pushbutton (PROG?) and two tiny potis inside. And a post connector (also prog?)
12:13.29DocScrutinizer05worst efect I found so far is display slightly flickering when polling the measured values via USB at a rate of 50Hz (well actually less, the cmdlime been '' while sleep 0.02; do echo GETD |tr \\n \\r; done >/dev/ttyUSB0; '')
12:14.11DocScrutinizer05and that 0.1V off issue
12:14.55DocScrutinizer05it's only a 2.5% error, but... annoying
12:15.50DocScrutinizer05when I say "gimme 5.0V" I expect it to display "5.0V" unless current limit kicks in
12:16.47DocScrutinizer05it actually displays "4.9V", and when I increase voltage target setting to 5.1 it acctually shows (and delivers) 5.1
12:17.45DocScrutinizer05afk, bbl
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21:03.43OksanaHello! How are you?
21:32.49enycwpwrak: hrrm I've seen substantial differences in just the normal output noise anyway...!
21:33.01enycwpwrak: let alone larger dynamic load changes
21:33.28enycwpwrak: I now see why soundcards always had their own linear regulators ;p
21:35.56wpwrakenyc: just to be clear: we're talking about lab power supplies. you'd kinda expect these to behave "nicely". alas, surprisingly many just don't ...
21:36.17enycwpwrak: hrrm!!! what internal design?
21:36.40enycwpwrak: i (thought) ''good'' lab power supplies tended to have a switcher  -or- multi-tap linear-transformer,  then feeding linear-regulated outputs
21:38.47wpwrakoh, dunno about the internals. i'
21:39.04wpwrakd suspect the more fragile ones may be switching
21:39.45wpwrakbut then, i haven't really looked into this. just noticed that i had serious troubles with dynamic loads.
21:40.44wpwrak(i have 3 digital and 2 analog lab power supplies in my lab. so in the end it's just a question of finding one that can handle the load. but ...)
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22:17.07enyci wonder how different the capacitances across outputs are... maybe they can't put much on if they want to cope with constant current modes..
22:19.02wpwrakor just current limit in general
22:19.21enychrrm good point
22:26.27x29aDocScrutinizer05: yeah, intresting that you checked it right away ;)
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