IRC log of #maemo for Thursday, 2018-06-28

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DocScrutinizer05<kou_2> Hey, so turns out that udev breaks if a btrfs balance is paused before rebooting - as in, it times out and waits for the balance to start up again before remounting so you get dropped into emergency shell12:32
Wizzupwhy would udev do that...12:34
KotCzarnybecause, who knows, maybe some not-well-tested distro?12:34
DocScrutinizer05I been mentioned in devuan context12:36
KotCzarnymaybe btrfs refuses to mount before unpausing12:36
DocScrutinizer05but... why would udev _not_ do that?12:36
KotCzarnydisclaimer: never used btrfs12:36
DocScrutinizer05btrfs calance is a critical atomic procedure I'd guess12:38
DocScrutinizer05balance*12:38
DocScrutinizer05sth about btrees afaik12:38
DocScrutinizer05oops sorry, not devuan, suse context12:42
DocScrutinizer05so you'd assume the fs they have as root default for their enterprise product should be damn well tested, at least when compared to the average community driven linux12:44
WizzupI can't imagine why this would be an issue13:07
Wizzupor why udev would test for this13:07
WizzupI've done this many times with btrfs and eudev anyway13:07
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DocScrutinizer05I can imagine why it wou,kd be an issue, when the fs was in an inconsistent state so system can't mount rootfs13:36
DocScrutinizer05but I never tested any of this, so I don't support any notion on it13:37
KotCzarnylet's blame it on the cluelessness13:37
KotCzarnyand move on13:37
DocScrutinizer05possible13:37
MaxdamantusThe overall balance isn't atomic, but I think the reallocation of each block is.13:38
Maxdamantusactually, I don't exactly "think" that, but it seems likely that it would be.13:39
Maxdamantusthe overall thing certainly isn't though, since it's just reallocating a bunch of chunks.13:39
Maxdamantus(should have said "chunk" before instead of "block")13:39
Maxdamantusnote: a "balance" in btrfs involves rewriting a number of chunks storing the data, usually to either uniformly distribute the chunks across devices, or to change to different "raid" levels.13:42
Maxdamantusand unless you apply a filter, it involves rewriting the entire filesystem.13:42
KotCzarnycute little operation13:42
KotCzarnyeven windoze handled defrag better13:43
MaxdamantusIt's a background thing.13:43
MaxdamantusIt shouldn't normally interrupt anything.13:43
Maxdamantusdunno what that person's initramfs is doing.13:43
MaxdamantusThings shouldn't normally care about the balance. Normally if you shut down or crash during a balance, it will just continue when you mount it again.13:44
Maxdamantusbut it's not critical that it continue .. you can always just cancel a balance if you want to.13:45
KotCzarnyfor some reason it had to do something important and wasnt allowed to continue, which resulted in unmountable fs13:46
MaxdamantusIf it's unmountable at a kernel level, you should almost certainly get at least some feedback in the kernel log.13:46
MaxdamantusIt shouldn't be unmountable just because a balance was in progress/paused.13:47
KotCzarnys/sunmountable/mountable/13:47
KotCzarnyhe might have some serious problem apart from that pause13:48
Maxdamantuson a couple of occasions I've had to manually zero the log before being able to mount (which supposedly means potentially losing up to the last 30 seconds or so of writes), but I don't think I've done that in the last couple of years, so presumably they do that automatically now in the kernel, or they've just fixed some of the issues that led to an unusable log.13:51
Maxdamantusafaik that used to be a typical reason for not being able to mount.13:51
Maxdamantusalso regarding defrag, balance doesn't help with fragmentation.13:54
KotCzarnyyeah, i was just joking on it13:54
Maxdamantussince it just involves copying blocks across, which are usually 1GiB big.13:54
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sicelommm, my Thinkpad X40 is begging for retirement. in addition to all USB ports dead, since yesterday sound isn't working20:58
KotCzarnypoor thing..20:59
KotCzarnymine is still rolling strong20:59
KotCzarnyonly plastic piece in one usb port broken20:59
KotCzarnyotherwise 100% functional, useful and kickin ass!20:59
KotCzarnyi got it 480gb ssd drive recently20:59
KotCzarnyso now it has 32gb ssd for os and 480gb for data21:00
sicelothe problem with sound seems to be hardware, i guess, since linux picks up sound card but pulseaudio and alsa both can't produce any sound at all21:00
KotCzarnytry dos/windoze?21:00
sicelowowo @ 480GB SSD. mine has paltry 60GB21:01
KotCzarnythe 480gb one was on the sale, 80usd with free shipping21:01
KotCzarnysh*tty chinese noname 3d nand tlc, but hey, it can hold a COPY of my data just fine21:01
sicelodunno if i'm up to the task of finding windows for the thing, as well as figure out how to boot it21:02
KotCzarnyhttps://www.geekbuying.com/item/Tigo-S300-480GB-Solid-State-Drive-2-5-Inch-SSD-Hard-Disk-398106.html21:02
KotCzarnythis one21:02
sicelommm, unless i tftp boot it.21:02
sicelomine (X40) was given to me back in July 2016. the usb ports were already dead (evidently common x40 issue), and lid switch non-working21:03
sicelobut it's been a nice little machine thus far :)21:04
KotCzarnyit still is21:04
sicelooh and bt, IR all non-working when i got it21:04
KotCzarnysame as n900, oldie, but goldie21:04
KotCzarnymaybe someone b0rked the firmware?21:04
KotCzarnyhard to imagine ir breaking21:05
KotCzarnybt is a tiny addon on a modem card21:05
siceloi bought chinese pc card for usb, but it has never worked too well. works well only 2% of the time haha21:05
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sicelolooks like the laptop was once opened ... i have often wondered if there aren't loose connections inside or something (even for lid switch). just never got around to opening it to check. i probably might now21:07
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siceloa couple of months ago i started having odd issue with MMC Card Reader - only reads card if i keep it pushed in :(21:08
siceloand batteries are finished too (lasting max 30 minutes now).21:09
siceloi can get battery ... but with the other issues, not sure if it's worth it21:09
sicelomaybe if i open it, i can get bt & IR working :)21:10
KotCzarny30 minutes is a lot21:10
KotCzarnymy t500 has 30seconds21:10
KotCzarny;)21:10
sicelohaha21:10
KotCzarnybut still enough for power surges so i dont change it21:11
KotCzarnyand if i'm quick enough i can change rooms21:11
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sicelooh and hibernation doesn't work anymore ... either a kernel or driver issue .. couldn't really figure it out (kernel 3.16 hibernates, but not 4.x)21:12
KotCzarnyalso, docking station is very nice for x40, makes all the cables on the back instead of sides21:12
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KotCzarnyand i can put 2nd hdd in (even sata with proper ultrabay adapter)21:12
siceloi've been thinking about getting either an X230 or T430 to replace the X4021:13
KotCzarnythinkpads after lenove took over arent the same quality (it got worse with every series)21:14
KotCzarnystill, nice to have core i5 cpu21:14
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sicelotheir price rnge here can just about match the size of my wallet. although recently i see the X250/T450 is good too (besided chiclet keyboard). it's slightly above what i am able to pay, but might be worth it in the long run21:15
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* sicelo wishes he didn't have this X40 as a first laptop haha 21:16
KotCzarny;)21:16
siceloruined me, now i don't think i can use anything else21:16
KotCzarnylove the kb21:16
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KotCzarnylove the build quality21:16
KotCzarnylove the features21:16
sicelothe trackpoint!! absolutely love it, and kb, yes indeed21:16
KotCzarnyyup, clit love too21:16
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KotCzarnybtw. want me to find and send you x40 mobo?21:17
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sicelothat would be awesome, if it can work out21:18
sicelo:)21:18
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siceloit's when it comes to computing that i wish i was living in Europe21:21
KotCzarnyusa is better for that21:21
KotCzarnyand now china21:21
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sicelohere even simple mobile data plan will set you back quite a bit of money21:22
Vajbsicelo: try ultimate boot cd with that laptop. There might be soundcard tests too21:22
sicelono one complains that manufacturers don't provide security updates, because no one wants to download them anyway :p21:23
Vajbat least it has wide amount of hw tests available21:23
siceloVajb: thanks. will look at it. hope i can booth that over tftp. it's the only way i can boot anything on it, unless i wipe the hdd maybe21:24
siceloalthough i am not ver hopefully. sound has been working all along. i can't fthom why it would stop suddenly.21:25
Vajbah it doesn't have cd rom drive...21:25
KotCzarny:>21:25
KotCzarnyand usb fried21:25
KotCzarnybut iso can be booted from grub21:25
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siceloyeah. it's like a bootlooping N900 with broken USb :p21:25
Vajbi wouldn't touch grub....21:26
KotCzarnygrub1 is simple and nice21:26
Vajbi fiddled with it few days and decided to start fresh21:26
sicelomy debian install has grub 221:26
KotCzarnyagain, try grub121:26
Vajbi think it was grub 2 too21:27
KotCzarnygrub1 has a very simple config21:27
siceloi will do so21:27
KotCzarnygrub2 probably can boot iso too, but might require different config21:28
siceloa quick search does show possible configs. i'll download UB cd tomorrow and try21:30
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blebis this a good place to talk about community-developed phones like chen's thing22:44
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