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| DocScrutinizer05 | Sicelo: stuck blue LED? | 01:14 |
|---|---|---|
| DocScrutinizer05 | Pali: how does your hostmode control the LED? via MCE dbus call for pattern? | 01:21 |
| Pali | mce dbus | 01:21 |
| DocScrutinizer05 | best practice | 01:21 |
| DocScrutinizer05 | :) | 01:22 |
| Pali | but when using bme replacement, then my usbmode does not touch led | 01:22 |
| Pali | bme replacement care of mce led dbus pattern | 01:22 |
| DocScrutinizer05 | does it wait until method call sends ack reply via dbus before process terminates? | 01:22 |
| Pali | yes, it must | 01:23 |
| Pali | this is how dbus method call works | 01:23 |
| DocScrutinizer05 | then I don't see how LED could possibly get stuck | 01:23 |
| Pali | I think there is some bug in mce | 01:23 |
| Pali | or race condition... | 01:24 |
| DocScrutinizer05 | possible | 01:24 |
| Pali | do not know what happen if you request led two times | 01:24 |
| Pali | if you need then to disable it two times too or not | 01:24 |
| DocScrutinizer05 | I think mce has a one element deep "stack" to resume previous state when a pattern gets discontinued | 01:24 |
| DocScrutinizer05 | not sure if it's deeper than just one element | 01:25 |
| Pali | if Sicelo can reproduce that bug, probably he needs to debug it too... | 01:26 |
| DocScrutinizer05 | a dmus-monitor >tracelog.txt should do | 01:28 |
| DocScrutinizer05 | dbus even# | 01:28 |
| Sicelo | i would have loved to. but all 3 batteries are bad now. device switches of within 2 minutes of hostmode. | 01:30 |
| DocScrutinizer05 | eeew | 01:33 |
| DocScrutinizer05 | batteries are rare and extremely expensive at your site, no? | 01:34 |
| DocScrutinizer05 | can' | 01:35 |
| Sicelo | good ones, yes. fake ones that last a month are in abundance :) | 01:35 |
| DocScrutinizer05 | t you get a used one which is still in good condition? | 01:35 |
| DocScrutinizer05 | also it's hot where you live? | 01:36 |
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| Sicelo | not so hot, i'd say. interestingly the batteries last at least 8 hours continuous use per day, but die immediately on hostmode (high internal resistance, i assume) | 01:37 |
| DocScrutinizer05 | yes | 01:38 |
| DocScrutinizer05 | seems so | 01:38 |
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| DocScrutinizer05 | could you run a bq27200.sh 10 >batlog.txt in parallel? | 01:39 |
| DocScrutinizer05 | with at least 15 minutes history before activating hostmode | 01:40 |
| DocScrutinizer05 | dunno if bq27200.sh works for your system | 01:40 |
| DocScrutinizer05 | (I.E. for the hostmode BME | 01:40 |
| DocScrutinizer05 | ) | 01:40 |
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| Sicelo | i modified it to work. | 01:48 |
| DocScrutinizer05 | good | 01:50 |
| DocScrutinizer05 | I'm really interested how a batlog of a supposedly worn battery would look like, when said battery works even with backlight but fails during 2 minutes on hostmode | 01:51 |
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| kerio | Last Measured Discharge (LMD): 1212.9075 mAh | 02:32 |
| kerio | 1122 to 1212 | 02:32 |
| kerio | how much was the maximum increase? | 02:33 |
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| liuhoujiang | k | 02:39 |
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| DocScrutinizer05 | kerio: iirc 1/8 | 02:48 |
| kerio | 1/8 of what | 02:48 |
| DocScrutinizer05 | of the value | 02:48 |
| DocScrutinizer05 | ~1212/1122 | 02:49 |
| infobot | 1.080213903743 | 02:49 |
| kerio | ~1122*9/8 | 02:49 |
| infobot | 1262.25 | 02:49 |
| DocScrutinizer05 | <1.125 | 02:49 |
| kerio | ok i'm gonna call this value the true one | 02:49 |
| kerio | so this is 1200mAh under heavy draw | 02:49 |
| DocScrutinizer05 | yup | 02:50 |
| DocScrutinizer05 | pretty decent | 02:50 |
| kerio | how do i measure the capacity under zero load | 02:51 |
| DocScrutinizer05 | discharge for a minute, no load for a minute, probe voltage | 02:52 |
| kerio | also can't we measure the mWh instead | 02:52 |
| DocScrutinizer05 | repeat, until voltage < EVDF | 02:52 |
| DocScrutinizer05 | bq27200 already does that | 02:52 |
| DocScrutinizer05 | (mWh) | 02:53 |
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| DocScrutinizer05 | SAE Available Energy | 02:55 |
| DocScrutinizer05 | http://paste.opensuse.org/53587960 | 02:55 |
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| Church-_ | Hmm, better than #n900 | 07:54 |
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| kerio | DocScrutinizer05: will openbsd run on the neo900? | 17:56 |
| DocScrutinizer05 | sure, why not? | 17:59 |
| DocScrutinizer05 | does openBSD run on beagleboard? | 17:59 |
| kerio | yes | 17:59 |
| kerio | http://www.openbsd.org/armv7.html a very small handful of boards | 17:59 |
| DocScrutinizer05 | so, there's your answer | 17:59 |
| kerio | yay ^_^ | 17:59 |
| kerio | ...is the neo900 just a beagleboard that you guys scrunched up to fit in the n900 case? ¬.¬ | 18:00 |
| DocScrutinizer05 | we even use BB-xM for "emu" in proto_v2 | 18:00 |
| DocScrutinizer05 | sort of, plus we added tons of peripherals | 18:00 |
| DocScrutinizer05 | btw same applies for N900 | 18:01 |
| DocScrutinizer05 | and for GTA04 | 18:01 |
| kerio | hm, is there any arm board with pcie 3.0 | 18:01 |
| DocScrutinizer05 | dunno of any | 18:01 |
| DocScrutinizer05 | maybe OMAP5 has such stuff | 18:02 |
| DocScrutinizer05 | seems it has SATA, so why not PCIE3 | 18:02 |
| DocScrutinizer05 | never closely looked into it | 18:03 |
| kerio | will http://www.intel.com/content/www/us/en/solid-state-drives/solid-state-drives-750-series.html work with the neo900 | 18:03 |
| kerio | it would add quite a lot of very fast swap | 18:04 |
| DocScrutinizer05 | honestly now, you tell us :-) | 18:04 |
| kerio | no arm board supports any of those fancy connectors :( | 18:05 |
| kerio | no nvme, no m.2 | 18:05 |
| DocScrutinizer05 | you got USB2.0 and UART as fast interfaces | 18:05 |
| kerio | """fast""" | 18:05 |
| DocScrutinizer05 | well, 480Mbit is already at the limits of the complete system | 18:06 |
| DocScrutinizer05 | I mean, you not only need to transfer data, you also need to *do* sth with it | 18:06 |
| DocScrutinizer05 | when you can't even transfer it to RAM anymore then your bottleneck is elsewhere, not in bandwidth of interface | 18:07 |
| kerio | just overclock the shit out of the ram | 18:08 |
| kerio | ez | 18:08 |
| DocScrutinizer05 | well, the RAM is still a tad faster than USB2 I think, but not like magnitudes faster | 18:08 |
| kerio | wait, really? | 18:08 |
| kerio | :o | 18:08 |
| kerio | fast unbuffered ram can reach 20GB/s | 18:09 |
| kerio | (ddr3 on intel) | 18:10 |
| DocScrutinizer05 | with a OMAP3? dream on | 18:10 |
| kerio | weirdly enough, the best ddr4 is slower than that | 18:10 |
| DocScrutinizer05 | we got LPDDR2-133 iirc | 18:10 |
| DocScrutinizer05 | maybe even -200 | 18:11 |
| DocScrutinizer05 | if my math doesn't suck due to lack of caffeine, that's still just 4 times the speed of USB2.0, roughly | 18:11 |
| DocScrutinizer05 | and you need to handle the IO too, which needs to get done in CPU land, either in sw or at least by DMA | 18:12 |
| DocScrutinizer05 | I could be wrong by factor2 or even 4, with my math | 18:15 |
| DocScrutinizer05 | still... you get the picture | 18:15 |
| kerio | ye ye | 18:15 |
| kerio | i was only mostly kidding | 18:15 |
| * kerio is still looking for a ram-based, volatile microsd | 18:17 | |
| DocScrutinizer05 | holler if you find any, would be a really nice device indeed | 18:19 |
| DocScrutinizer05 | anyway on OMAP3 iirc the SDcard interface is limited to 48Mhz clock and, for uSD, 4 bit bus width, which makes 24MB/s in my book | 18:24 |
| DocScrutinizer05 | eMMC has 8bit bus, thus twice that | 18:25 |
| DocScrutinizer05 | so it's somewhat on par with USB2.0 | 18:26 |
| kerio | ...i didn't realize that the uSD was that slow | 18:26 |
| ceene | is the ram on n900 replaceable? | 18:28 |
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| DocScrutinizer05 | plainly no | 18:31 |
| ceene | can't the chip be unsoldered and replaced? | 18:31 |
| DocScrutinizer05 | some tried it, I never heard again from any of them | 18:31 |
| DocScrutinizer05 | we did something similar on beagleboard-xM to test our 1GB RAM | 18:32 |
| DocScrutinizer05 | which took highly sophisitcated rework station and experienced personal to get accomplished | 18:32 |
| ceene | is it bga or something like that? | 18:33 |
| DocScrutinizer05 | and we swapped the complete SoC/RAM&NAND PoP stack | 18:33 |
| DocScrutinizer05 | it's PoP | 18:33 |
| kerio | DocScrutinizer05: yeah but can you clean the fans of my macbook pro? | 18:34 |
| DocScrutinizer05 | yes, I'll use pressurized air and kill your macbook ;-P | 18:34 |
| kerio | https://www.ifixit.com/Device/MacBook_Pro_15%22_Retina_Display_Late_2013 | 18:34 |
| kerio | Repairability: 1 / 10 | 18:34 |
| DocScrutinizer05 | I did so with other notebooks before | 18:34 |
| kerio | i cleaned my mom's non-retina macbook, it was very very easy | 18:35 |
| kerio | other than the fan connector being kinda thin | 18:35 |
| kerio | this one is insane tho ._. | 18:35 |
| DocScrutinizer05 | a fan at several 1000s of RPM can create amazing amount of voltage fed to the PCB | 18:35 |
| kerio | still haven't tried it, because "Step 1 - Remove the following pentalobe screws" | 18:35 |
| kerio | i want to believe there's some protection circuit, but probably not | 18:35 |
| DocScrutinizer05 | no obviously there isn't | 18:36 |
| DocScrutinizer05 | "how pressurized air can make your electronics go up in smoke" | 18:36 |
| kerio | there's glue EVERYWHERE | 18:36 |
| kerio | ;-; | 18:36 |
| ceene | does that happen? | 18:37 |
| kerio | sure | 18:37 |
| kerio | there's a reason it's very very recommended to detach the fans and prevent them from spinning when using compressed air | 18:37 |
| ceene | i'm used to clean pcs with air | 18:37 |
| ceene | does that break them? | 18:38 |
| DocScrutinizer05 | ceene: see https://en.wikipedia.org/wiki/Package_on_package | 18:38 |
| ceene | DocScrutinizer05: yeah, i was reading that | 18:38 |
| DocScrutinizer05 | ceene: yes, when the fann starts to spin very fast | 18:39 |
| ceene | i don't think any of the people i know at my uni would be able to unsolder that | 18:39 |
| ceene | oh, i've made several of them do that... just for fun :/ | 18:39 |
| ceene | didn't know it was harmful :/ | 18:39 |
| DocScrutinizer05 | I killed two laptops this way, without disassembling them | 18:44 |
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| DocScrutinizer05 | the first was learning, the second was idiocy | 18:44 |
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| DocScrutinizer05 | I thought I could control the effect by only blowing gently | 18:44 |
| DocScrutinizer05 | with a 10 bar canned air | 18:45 |
| DocScrutinizer05 | ;-P | 18:45 |
| ceene | i use a pressurizer :) | 18:45 |
| ceene | but i've only cleaned desktop computers, never a laptop | 18:46 |
| DocScrutinizer05 | anyway my recommmendation is: make DAMN SURE you block the fan from spinning for good, before you approach it with pressurized air or vacuum cleaner | 18:48 |
| ceene | will do from now on | 18:49 |
| DocScrutinizer05 | for added peace of mind, disconnect the fan from PCB if any possible | 18:49 |
| DocScrutinizer05 | so if your block fails, only the fan will go south | 18:49 |
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| kerio | DocScrutinizer05: motha | 19:34 |
| kerio | fuckin | 19:34 |
| kerio | chopsticks | 19:34 |
| DocScrutinizer05 | huh? | 19:35 |
| DocScrutinizer05 | yes, stick a chopstick to fan | 19:36 |
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| Vajb | i made silent pc once by chopsticking psu fan :p | 20:31 |
| kerio | Vajb: 10/10 | 20:33 |
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| * DocScrutinizer05 often pondered making silent PC by simly adding a chimney | 23:29 | |
| DocScrutinizer05 | the hotter the air, the better it works. Just like it should be :-) | 23:30 |
| DocScrutinizer05 | and absolutely zilch noise | 23:30 |
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| M4rtinK | yeah, should work quite nicely | 23:44 |
| M4rtinK | as long as you have enough space for that | 23:45 |
| sixwheeledbeast | Remove all the fans from the cab | 23:45 |
| M4rtinK | & the box is reasonably airtight with an opening at the bottom | 23:45 |
| sixwheeledbeast | then point a desk fan in there... | 23:45 |
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