IRC log of #maemo-ssu for Friday, 2013-10-11

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FatPhilAh, that looks like Pali's tree, and freemangordon's is a fork from it00:09
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freemangordonFatPhil: if you manage to boot fremantle with 3.12 on you devel device and wonder what to start doing with it, you may want to look why after a reboot from 2.6.28 to 3.12 a couple of devices connected to i2c fail to start :)09:52
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freemangordonFatPhil: and yes, my tree is a clone of Pali's, but Pali's lag a little because of his faulty laptop09:54
FatPhilfreemangordon: good to know. I cloned yours, with linux as a --reference, I'll try to pull daily. How often to you merge?09:56
freemangordonit is pali who pulls upstream, iiuc on a release09:56
Palino merge09:56
PaliI only rebasing patches on rc/release versions09:57
Paliso I always see patches which are not in upstream...09:57
freemangordonPali: are there lots of them?09:58
Paliyes09:58
freemangordon(excluding drivers)09:58
PaliI think all are drivers or board code09:58
freemangordonwell, not that bad then09:59
Palionly small of them patching something other09:59
freemangordongood09:59
freemangordonsailus: ping10:00
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Palifreemangordon: did you already looked at DT?10:10
freemangordonPali: no, I am waiting for something to come from upstream10:11
freemangordonin 3.13 there should be10:11
Paliok10:11
Palithen we will wait for 3.1310:11
freemangordonI'll send a couple of mails about broken omapfb later on10:12
Paliso now only need to fix snd (with jack detection), omapfb and camera, right?10:12
freemangordonyep10:13
freemangordonand gpios10:13
Paligood10:13
Paliand what about power management?10:13
freemangordonooh, and LEDs10:13
Paliah leds, I will look at them10:13
freemangordonPali: I think we should have everything working first10:13
freemangordontouchscreen is not disabled, so it is hard to say what is the state of PM10:14
freemangordonhmm, maybe I should look at that issu10:14
freemangordon*issue10:14
Palitouchscreen is not disabled when lock screen?10:14
freemangordonyes10:14
Palimaybe problem with slide gpio and mce10:14
Palior maybe missing some touchscreen sysfs entry10:15
freemangordonno, display is powered off10:15
freemangordonbut TS still active10:15
freemangordon:nod: (missing sysfs entry)10:15
freemangordoni'll look at it10:16
FatPhilPali: if you rebase, then you're not fast-forwardable. You're not a stable tree upon which to base anything else.10:18
FatPhilhttp://changelog.complete.org/archives/586-rebase-considered-harmful10:18
FatPhilSee the first bit in bold10:19
FatPhilIt's great for solo work, but not when you're sharing your tree10:19
PaliFatPhil: for each kernel version I have separate patch set10:20
Paliand rather I will use quilt for n900 patches, but it is not easy for use10:20
FatPhilquilt was invented when git didn't exist. there's no logical reason to use it now git exists.10:21
Palifor each kernel version I have separe branch10:21
FatPhilOK, at least that helps keep things sane10:21
PaliI need to see all patches which are not in upstream10:21
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Paliand I also need to generate formated patches for sending to upsteam10:22
Paliwhich means I must rebase patches on top of some new kernel version10:22
Palifast forward and merge will totally broke it10:23
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Paliand then there will be big mess about patches...10:23
Paliwhen I rebasing patches on top of new kernel version, I doing some patch simplification or merged more patches to one if that make sense10:24
Paliso I have clean patches...10:24
Paliand I never doing push --force, so repository is never broken10:24
Paliyou always can do pull fast forward10:24
Palibut sometimes you need to switch to new branch10:25
freemangordonhmm: "/sys/devices/platform/omap2_mcspi.1/spi1.0/disable_ts"10:25
FatPhilwhose touchscreen driver are you running?10:27
freemangordonupstream10:27
FatPhildoes it have a threaded irq?10:27
freemangordonNFC10:27
FatPhilOK, aaro's not mine10:27
freemangordonbut it should have, as it is forced10:27
freemangordon(threaded irq)10:27
FatPhilthere were no threaded irqs in .28, when I was maintaining tsc2005.c10:28
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freemangordonin 3.12 all are threaded, unless you specify a flag in request_irq, iiuc10:28
FatPhilDmitry Torokhov's done some big cleanups to that code too, it's changed quite a lot10:29
jonwilbtw did we end up solving the problem of that one driver where the kernel guys refused to accept changes because "its Nokia's Driver and only Nokia can change it"?10:30
freemangordonjonwil: there is no problem, Pali wanted to simplify the things10:31
jonwilok10:31
freemangordoniirc10:31
Palijonwil: it is still a problem10:31
jonwilok10:31
Paliin usb subsystem10:31
FatPhiljonwil: that was a patch from Pali that Felipe rejected as it created potential breakage for legacy userspace10:32
FatPhilIIRC10:32
jonwilok10:32
Palithere was no userspace breakage10:32
freemangordon:nod:10:32
Palibut I will send that patch for comments again10:32
Palion top of 3.12-rc110:33
FatPhilDidn't it change the userspace API?10:33
Paliin 3.10 was g_nokia totally broken10:33
Palino, it did not changed any api10:33
Paliit added new optional support10:33
Paliwhich can be at runtime enabled/disabled10:33
Palifreemangordon: is g_nokia working in 3.12?10:34
Paliis pc suite mode working?10:34
Paliis mass storage working?10:34
freemangordong_nokia is broken, at least in bootmenu10:34
Palican you test it?10:34
freemangordonok, I will10:34
Paliok10:34
freemangordonPali: would bq start charging if device booted with charger attached?10:36
freemangordonbq driver that is10:36
FatPhilah, this thread... http://lkml.org/lkml/2013/1/22/37510:37
Palifreemangordon: should10:38
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freemangordonwell, well, the path for TS is different10:44
freemangordonBUT - there is no "disable" sysfs entry iiuc10:44
Palifreemangordon: so only sysfs entry is missing?10:44
freemangordonPali: and path differs too10:45
freemangordon"/sys/devices/platform/omap2_mcspi.1/spi_master/spi1/spi1.0" is in 3.1210:45
Paliyou should use /sys/class10:45
freemangordon"/sys/devices/platform/omap2_mcspi.1/spi1.0/" is what mce looks for10:45
freemangordonPali: me? :P10:46
Palican you check if you have it in /sys/class/ too?10:46
freemangordon"/sys/class/spi_master/spi1"10:46
freemangordonthat is linked to "/sys/devices/platform/omap2_mcspi.1/spi_master/spi1"10:47
Palisome other class name (like input/touchscreen/....)?10:48
FatPhilcommit 5cb81d19bae47adcb073a5e5a3bc40dd252f239e10:49
FatPhilhopefully revert to solve "so only sysfs entry is missing?"10:49
FatPhilpure guess10:49
Palion kp52 I have /sys/class/spi_master/spi1/device/spi1.010:50
freemangordonnot in 3.1210:51
Paliand what is on 3.12?10:52
freemangordonPali: ^^^10:52
freemangordon"/sys/class/spi_master/spi1"10:53
freemangordonlinked to "/sys/devices/platform/omap2_mcspi.1/spi_master/spi1"10:53
Palikp52: /sys/class/spi_master/spi1/device/spi1.0/disable_ts10:53
Paliin 3.12 there is? /sys/class/spi_master/spi1/disable_ts10:54
freemangordonno, see the commit posted by FatPhil10:54
Palilink?10:54
freemangordon"Input: tsc2005 - remove 'disable' sysfs attribute"10:54
PaliI do not have git tree on n900 :D10:55
freemangordonthis is the title ^^^10:55
freemangordonlets see if we can use some "power" sysfs entry10:55
FatPhilhttp://www.spinics.net/lists/linux-input/msg14575.html10:55
FatPhilPali: ^^^ = that patch10:55
Paliok10:55
FatPhilWho was interested in the AES h/w acceleration10:56
Paliif we can offload aes from cpu to other dedicated hw, then it can be really usefull10:58
Palie.g. for luks10:58
freemangordonPali: FatPhil: any clue how to power down(disable) a device using sysfs entry?10:59
FatPhilPali: http://privatepaste.com/97443f891d10:59
Paliwrite something to power/level10:59
Paliand if level does not exits, then there is no way11:00
FatPhilfreemangordon: I liked the old sysfs way, but I have a 2.6.28 brain11:00
freemangordonPali: what needs to be done so "level" to appear?11:00
freemangordonFatPhil: same here :D11:00
FatPhilI'm not sure why Dmitry removed the functionality from tsc2005 before adding a generic replacement11:00
PaliFatPhil: about that secure code: it is not possible to enable it from non secure side via smc calls?11:01
Palilike IBE bit for thumb errata11:02
Palifreemangordon: report bug to maintainer for reverting old sysfs entry for compatibility mode (or to implemented new support)11:03
FatPhilMaybe someone could ask him why he broke userspace ;-)11:03
Paliright11:03
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FatPhilA very cheesy way of "disabling" the ts is to just close the device node, of course11:07
FatPhilwho's the client that relies on ts_disable?11:07
freemangordon_FatPhil: mce :D11:08
freemangordon_FatPhil: (power outage here) is there a way to open that firewall by using SMC?11:09
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freemangordonFatPhil: also, what exactly do you mean by saying "firewall"? all I know is some co-processor registers11:10
Paliomap firewall from that pastebin11:11
freemangordonwhat IS "omap firewall", I've never seens such a term in ARM docs11:11
FatPhilfreemangordon: have you even seen the secure mode docs ;-)11:12
freemangordonno, but co-pro regs are well documented in public docs11:13
FatPhilMy understanding, and I've never ever looked at secure mode, is that the firewall is just a name for rejecting certain requests. If it's not configured in secure mode to enable those calls, you can't call them.11:14
freemangordonwhich is exactly what some regs in system control coprocessor do11:15
freemangordonthough mshield is missing from the public docs afaik11:16
jonwilso much omap bits not made public and only revealed under NDA11:17
FatPhil90% of the kernel developers didn't have access to that bit of the TI docs11:19
FatPhilEven the TI onsite support dude didn't have access to the TrustZone docs, it was that secretive11:19
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Palithere is some docs about arm trustzone11:20
Palion arm website11:20
Palionly need to register11:20
jonwilProbably not the secret bits11:21
freemangordonHW AES shouldn;t be that secret11:21
jonwilThat Jazelle stuff for Java speedup is also totally secret :(11:22
freemangordonyeah :(11:22
jonwilI think the Java thing was a deal with Sun to make sure that only Sun approved JVMs could use the hardware acceleration11:22
FatPhilnow deprecated, thank ${DEITY}11:24
Palithere is thumb-ee ISA for jit compilers11:24
jonwilSurprised no-one didn't just reverse engineer Jazzelle11:26
jonwilWouldn't be the first time someone reverse engineered undocumented instruction sets :P11:26
Palibecause of java?11:27
Paliwhy somebody want to have java on mobile???11:27
freemangordonjonwil: nothing to RE afaik. jazelle is something like FP on 8088 iiuc11:27
freemangordonyou either have HW support, or you get an interrup/fault/whatever11:27
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Palirather to have native code as some hw support for java jvm11:28
freemangordonjonwil: iiuc, you have some java bytecode instructions supported in HW11:28
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jonwilJazzelle came about back when J2ME was king and the CPUs in phones were less powerful than they are today11:32
jonwilso it made sense to support it11:32
jonwilhttp://en.wikipedia.org/wiki/Jazelle indicates that using it isn't as simple as it sounds11:33
freemangordonhmm, no "level" here https://gitorious.org/linux-n900/freemangordons-linux-n900/source/777f4ace4c58799575391833db48050ceefe6fd6:Documentation/ABI/testing/sysfs-devices-power11:34
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FatPhilfreemangordon: Doh - I'm being thick, the very next patch (backwards in time) shows what the correct power interface is - open/close! commit 0b950d3d7ce4c1e870b8efc4ae0faaf0ef53532c11:58
freemangordonFatPhil: yep, saw that11:59
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freemangordonbut I don;t know who opens it11:59
FatPhilX?12:00
freemangordoncould be12:00
freemangordonbut doesn't help much :D12:00
FatPhillsof should say12:00
freemangordonNokia-N900:/dev/input# lsof ts12:02
freemangordonCOMMAND    PID USER   FD   TYPE DEVICE SIZE NODE NAME12:02
freemangordonXorg      1581 root   11u   CHR  13,67      6903 event312:02
freemangordonhald-addo 1664 root    6r   CHR  13,67      6903 event312:02
freemangordonmce       1948 root   10r   CHR  13,67      6903 event312:02
freemangordonopen/close won't help12:02
FatPhilyup12:02
FatPhilDmitry needs mailing12:02
freemangordoncould you do it?12:02
FatPhilsure thing12:03
freemangordoncopy me and Pali please12:03
FatPhilThat's a possibility. As long as it doesn't immediately get dismissed as just being those troublemakers again...12:06
freemangordonFatPhil: hmm?12:07
freemangordonwho are the troublemakers?12:07
freemangordon:D12:07
freemangordonooh, those die hard n900 guys who want the kernel to work on a real HW. I see...12:08
freemangordonFatPhil: BTW I don;t see what else could be used12:09
FatPhilWell, people who swear at Felipe Balbi might be considered troublemakers, for example12:09
freemangordondon;t copy Pali then  ;)12:09
freemangordonFatPhil: any idea what else could be used instead of disable sysfs entry?12:10
FatPhilI think revert the patch is the best option12:11
FatPhilIt's lunchtime here though. I'll write the mail with a full belly12:12
freemangordonsounds sane12:12
FatPhilI got as far as:12:18
FatPhilBack in http://www.spinics.net/lists/linux-input/msg14575.html [PATCH 17/17] Input: tsc2005 - remove 'disable' sysfs attribute12:18
FatPhilyou broke Nokia n900 userspace.12:18
FatPhilBut decided that was not the polite approach12:18
freemangordonyeah, you'd better have something for lunch :)12:18
FatPhilneed food! but before I get food, I need socks!!! (moved back to tallinn last weekend, everything's chaos here)12:21
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PaliFatPhil, freemangordon: when you sent those mails to lkml (without cc), please at least send links here14:56
FatPhilPali: will do15:03
FatPhilHAs anyone ever seen the UI "shrunk"?15:04
FatPhilFulol functional, just only taking up 2/3rds of the screen15:04
FatPhils/fulol/fully15:04
merlin1991FatPhil: yep15:04
merlin1991reboot and it's gone15:04
merlin1991we don't know the exact cause15:05
merlin1991btw to use it, the touchscreen still is used as if the ui were "fullscreen" :D15:05
FatPhilyup, worked that out!15:21
FatPhilThe weird thing is that the swipe-to-unlock is the right size!15:21
kolpFatPhil: For me it happend when I locked the device right after the wallpaper showed at boot time. When I then unlock a little later the scrren is 2/3rds like you see15:31
Palifreemangordon: is there public documentation about omap3 smc calls?15:39
Palito check if omap hw rand driver is ok?15:39
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FatPhiloi, silly bot, what was the URL I told you to pass on to Pali...17:19
jonwilwouldn't that be in the chanlog? :P17:19
FatPhilYeah, but I want the bot to feel useless, lest it gets a sense of superiority to humans17:21
Paliirc memoserv is for offline messages .-)17:22
FatPhilYRC, many thanks!17:26
FatPhiljonwil: have you decompiled nolo?17:29
jonwilnope, I wouldn't know where to begin as its a binary blob rather than an ELF executable17:30
jonwiland obviously I cant decompile it since its ARM and not x8617:30
Paliyou can embed binary blob into elf :-)17:30
jonwilbut no I haven't disassembled it17:30
jonwilwhy the interest in nolo?17:30
Palijust compile empty file to elf object file17:31
Paliand then objcopy nolo into that elf object17:31
Paliand then objdump -D for disassembling working fine17:31
jonwilits not about loading the binary into IDA its about knowing where in the address space the different parts of the blob need to sit, its about knowing whats instructions and whats data etc17:32
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jonwilalso I have no reason to care much about nolo17:32
jonwilIts not going to be usable on Neo900 in any case17:32
jonwilsince nolo is tied to the specific OMAP SoC in N90017:32
jonwilso again I say, why the interest in NoLo?17:39
freemangordonjonwil: I suspect because of AES17:43
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freemangordonhmm, but why nolo?17:44
freemangordonPali: there is something mentioned in public 3430 TRM, lemme check what it is17:45
Palifreemangordon: ok17:45
Palisome doc for omap3 rom rng can be usefull17:45
jonwilPersonally I would be less inclined to trust hardware cryptography given all the recent NSA stuff (and given that Texas Instruments is a big USA company that would probably bend over backwards if the NSA wanted them to add backdoors to their parts)17:46
jonwiland I know a few security researchers and crypto geeks who would agree with the idea of being suspicious of hardware crypto and RNGs and stuff in mass-market hardware17:47
Paliseed from hw rng for /dev/urandom should be safe17:48
jonwilat least with a software implementation in, say, openssl, its possible to audit that implementation17:48
Paliand good17:48
freemangordonPali: all is about L2 and AUX CTL,17:48
freemangordonSWPU223M, p.338217:49
Paliok17:49
PaliI did not find anything on internet about omap3 rng (expect info in maemo kernel)17:50
Palianybody has doc about smc/secure part?17:51
jonwilTI seems to want to keep all that stuff secret17:55
jonwilincluding security features17:55
jonwilhardware RNG/crypto17:55
jonwiletc etc17:55
freemangordonjonwil: most probably they are missing in GP devices17:55
jonwilI doubt anyone who has that doc will be willing to share public (it likely has a lot of "confidential TI information" warnings at the top of irt)17:56
Paliyes, gp devices does not have them17:56
Palibut why is api big secret? if you want to use it - it must be in kernel and that is open source...17:57
freemangordonPali: how is HWRNG called? through SMC?17:57
jonwilIs Linux the only OS that can run on the TI OMAP?17:58
jonwilI doubt it17:58
jonwilalso, having kernel source and having full docs are 2 different things17:58
jonwilespecially if kernel source is written in a way to hide as much info as possible17:58
jonwile.g. not giving names to hardware registers (or giving useless names)17:59
freemangordonPali: hmm, what we need is smc calls for n90018:00
freemangordononly 3 functions are in trm, with their numbers not matching what is in n90018:01
Palifreemangordon: yes hwrng is used by calling smc18:01
freemangordonPali: the only think we can use is 2.6.28 kernel18:01
freemangordon*thing18:01
Palifreemangordon: hwrng driver is already in lkml18:02
freemangordonI know18:02
PaliI sent it for upstream18:02
freemangordonI know that too. the point is that our only source of info re ROM on n900 is 2.6.2818:02
Palibut I do not understand why there is rng driver for omap2 and omap4 which using normal memory access18:03
Palibut nothing for omap318:03
freemangordonPali: where?18:03
freemangordonupstream>18:03
Paliyes in upstream18:03
freemangordons/>/?/18:03
infobotfreemangordon meant: upstream?18:03
Palibut for omap3 is only via smc...18:03
freemangordonPali: did you try upstream on n900?18:04
Paliand aes/sha/md5 driver using also direct mem access, but secure side needs to be configured18:04
freemangordonPali: hmm, wait. I bet there is an smc call to use crypto module18:05
Palifor me it looks like that smc code is used when secure side is not configured for direct mem access18:05
freemangordon:nod:18:05
Palino crypto module using direct mem access18:05
freemangordonthat is why my bet18:05
Palino smc calls18:05
freemangordonhow do you kno0w that?18:05
Paliyes I already looked at crypto module source code18:05
freemangordonPali: that's not relevant18:06
Paliit is in upstream kernel18:06
freemangordonPali: isn't it the same for HWRNG? ;)18:06
freemangordonupstream uses memory, we SMC18:06
freemangordontoldya, I bet it is the same for crypto18:07
PaliI do not understand why: hwrng for omap2 and omap4 (both different code), crypto modules (sha, aes, md5) using direct mem read/write18:07
Paliand our omap3 hwrng calling smc18:07
freemangordonwhat other device but n900 uses HWRNG from the kernel?18:07
Paliand there is no omap3 hwrng in upstream18:07
Palido not know18:08
freemangordonN9?18:08
freemangordonwhat about it? merlin1991 ^^^18:08
Palido not know, need to look into harmattan kernel18:08
freemangordonPali: hmm, I guess we can find the info from harm kernel18:09
freemangordonI'll join #harmattan and ask18:09
Paliok18:09
Paliif that channel is not dead18:09
freemangordonfeel free to join :)18:09
freemangordonit is not dead18:10
Palifreemangordon: look: http://www.droid-developers.org/wiki/Trust_Zone18:11
freemangordonPali: I see nothing of interes here, do I miss something?18:16
freemangordonPali: where is HWRNG driver in KP?18:21
Paliin drivers/char/hwrng18:22
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FatPhiljonwil: was yesterday's dose of cosmetics acceptible?18:55
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FatPhilfairly subtle passive-aggressive mail composed, ready for sending19:35
FatPhil"given that you've shat on our heads, any advice on how we should comb our hair?"19:36
freemangordon:D19:36
freemangordonPali: NOLO calls PPA with some other functions, like 37, 29, 21, 20, 19 1519:44
freemangordonome of them have traces like "Initializing secure storage" (20) "Initializing RPC" (21)19:47
merlin1991FatPhil: did that go to some mailing list, ... can I read it?19:47
Palisecure storage??19:48
freemangordonNFC what that is19:48
PaliDRM?19:48
merlin1991it is a 2337 haxx0r proof memory location ofc ;)19:48
Palibut maemo has no DRM support...19:48
freemangordon18 is "Importing PAPUB keys"19:49
PaliPAPUB key is some part of x-loader signing chain maybe...19:49
Palior maybe R&D certificate19:49
freemangordoncould be19:49
freemangordonthe point is that we don;t know all PPA functions. and there is a hope there is some function in PPA, which allows us to enable crypto19:50
FatPhilmerlin1991: *that* didn't go to any mailing list - I was just playing things for laughs ;-)19:51
Palifreemangordon: in notebook hdd I have that xloader with crypto enabled functions19:52
Palixloader is for hw rev 2101 only19:52
Paliand nolo secondary too19:52
Palican you do some diff against pr1.3 xloader & nolo?19:53
freemangordonPali: there is xloader (some 15k binary) for every rev19:54
freemangordonunpack fiasko19:54
freemangordonyou'll see19:54
Palibut not xloader with crypto functions enabled19:54
freemangordonI don;t have it19:54
Palithat xloader was part of that email sent to maemo ml19:54
freemangordonlink?19:54
Paliuploaded to megaupload19:55
Paliso link is dead now19:55
freemangordonjacekowski?19:55
Palibut I should have copy in notebook hdd19:55
merlin1991Pali: do you have some backup of the notebook hdd somewhere?19:55
Palihttp://maemo.org/community/maemo-developers/n900_aes_and_sha1-md5_hw_acceleration_drivers/19:55
merlin1991I'm starting to feel like a lot of important (for us) stuff resides there19:56
Palimerlin1991: hdd is near me :-) but I do not have any reader of notebook hdd19:56
merlin1991shouldn't it be regular sata? (if it is not that old)19:56
PaliI do not have any machine here...19:56
PaliI will never give hdd with notebook to some warranty service provider19:57
PaliI do not trust any company...19:57
* merlin1991 feels like sending his old notebook to Pali, only problem I don't think it is sata yet :D19:57
Palifreemangordon: look at link ^^^19:58
freemangordon"Invalid or Deleted File." :(19:58
PaliI got email from HP that I will receive email about case :D19:58
freemangordonPali: don;t tell me you sent your laptop without have your HDD backed up19:59
Palifreemangordon: read ^^ I sent it without HDD20:00
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freemangordonPali: oh, ok :)20:09
FatPhilfreemangordon: merlin1991: Pali: http://lkml.org/lkml/2013/10/11/53320:15
FatPhil^^^ tsc2005 mail20:16
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