| gil | Hi - I am really hoping someone can help me here.... I've managed to lock myself out of my btrfs encrypted home partition - it simply won't mount anymore.... I am currently in knoppix trying to recover it, but cannot access it at all (due to the encryption) - it is mounted but just has a readme.txt file that I can't access.. can anyone tell me the steps I need to take to access my data on it? | 00:13 |
|---|---|---|
| bazhang | lost the encryption key/pass? | 00:17 |
| gil | not at all | 00:18 |
| gil | it's basically causing Ocelot to refuse to boot | 00:18 |
| bazhang | what are the mount errors | 00:18 |
| gil | so many messages but it definitely says "failed to mount /home" - problem is it's overwritten by a LOT of text | 00:18 |
| gil | so I am currently in knoppix just trying to access my drive | 00:18 |
| gil | and I don't know what to do, to be honest | 00:18 |
| gil | :( | 00:18 |
| gil | I know the password for it | 00:19 |
| bazhang | got backups, I hope | 00:19 |
| gil | well | 00:19 |
| gil | ..... | 00:19 |
| bazhang | ? | 00:19 |
| gil | you know the answer here, if I had backups I wouldn't be desperate | 00:19 |
| gil | I didn't have a LOT of data on it though | 00:19 |
| bazhang | thats really bad | 00:19 |
| gil | the only thing I really want to get is my bitcoin wallet | 00:19 |
| gil | bazhang basically it happened so quickly - I had the system up for an hour, was just moving stuff over before I backed up the partition, system hung on shut down, hard power off, and then on boot it started trying to check drives and refused to mount /home | 00:20 |
| gil | so yeah, it's bad, but it's not like I wasn't going to back everything up to the server eventually :( | 00:20 |
| penguin42 | gil: So you have knoppix mounting the root filesystem of the victim disk - are there any errors in /var/log of the victim disks root ? | 00:21 |
| bazhang | and got a separate boot which is also btrfs? | 00:21 |
| gil | penguin42 at the moment, I can't get into the disk because of the encryption - it basically has a @home directory and in that a readme.txt file that I cannot access | 00:22 |
| gil | bazhang I don't have a separate boot which is also btrfs, just this knoppix recovery | 00:22 |
| penguin42 | gil: OK go back a step; explain the disk partitioning - is it a btrfs root with an encrypted home using ecryptfs or is it a luks encrypted btrfs ? | 00:22 |
| gil | penguin42 basically, I have 4 partitions. /boot - ext2.... / - reiserfs ..... /home - encrypted btrfs (whatever Ocelot's install tool did by default for encryption) and /swap | 00:23 |
| gil | I know that's weird, but I wanted to test an extreme scenario to see what happened | 00:23 |
| penguin42 | gil: And it broke - <SHOCK> | 00:23 |
| gil | I know from being able to play in a recovery console that my other partitions are fine | 00:23 |
| penguin42 | gil: OK, so look in that reiserfs / at the logs | 00:24 |
| gil | and I am hoping that my btrfs partition may be salvageable - I just have no clue what to do about decrypting it | 00:24 |
| gil | penguin42 okay looking now | 00:24 |
| gil | penguin42 http://pastebin.com/HLZW8gqm | 00:25 |
| penguin42 | gil: So I don't use that much myself; but I think that Ubuntu uses ecryptfs to encrypt the stuff underneath for home directory - so you shouldb be able to mount the btrfs | 00:25 |
| penguin42 | gil: The mount /home [974] killed by SEGV signal sounds like a bug - which log was that? | 00:26 |
| gil | boot.log | 00:26 |
| gil | I did actually just update the kernel today | 00:27 |
| gil | so... maybe I found a bug | 00:27 |
| gil | which is bad but also good | 00:27 |
| penguin42 | anything juicy in kern.log or syslog? | 00:27 |
| gil | because the more I look at it, the more it seems that my drive may be okay | 00:27 |
| gil | looking now | 00:27 |
| gil | Jul 4 21:57:42 home kernel: [ 6.136678] kernel BUG at /build/buildd/linux-3.0/fs/btrfs/inode.c:4584! | 00:29 |
| gil | Jul 4 21:57:42 home kernel: [ 6.136695] invalid opcode: 0000 [#1] SMP | 00:29 |
| gil | Jul 4 21:57:42 home kernel: [ 6.136713] CPU 1 | 00:29 |
| gil | could that be it? | 00:29 |
| penguin42 | yep - a kernel panic | 00:29 |
| penguin42 | someone the other day had a btrfs related kernel oops | 00:29 |
| gil | okay so at least that explains why I can't boot :) | 00:30 |
| penguin42 | gil: So I think to get you need something that you can boot from with a working btrfs and ecryptfs fs module; not sure if knoppix does; but once ou do that you mount the btrfs and then somehow do the ecryptfs stuff that I've never touched | 00:31 |
| gil | :) | 00:33 |
| gil | penguin42 I appreciate you taking a look at this - I am actually slightly less panicky than I was 20 minutes ago | 00:33 |
| penguin42 | git: np | 00:34 |
| gil | penguin42 would an alpha 1 live image do the trick? | 00:34 |
| gil | I really want it to be as easy as booting into the live image, mounting /dev/sda5 and keying in my password | 00:35 |
| gil | somehow I know it won't be :( | 00:35 |
| penguin42 | gil: Well that depends if the alpha1 already has that bug | 00:41 |
| gil | penguin42 I'm not sure if it does, as I used the alpha1 image to install in the first instance, and it has been fine until today | 00:41 |
| penguin42 | gil: Now, just to make you panic a bit, the question is whether the bug is to do with mounting a btrfs or whether the bug is that something really nasty was written to it | 00:42 |
| gil | Well, I can certainly access the drive here in knoppix though | 00:43 |
| gil | I just can't get around the decryption | 00:43 |
| penguin42 | you need to look up stuff about ecryptfs; I don't know anything about it | 00:43 |
| gil | that makes two of us | 00:44 |
| * gil has learnt a valuable lesson this evening | 00:44 | |
| penguin42 | true; but I don't have an ecryptfs partition with valuable data on | 00:44 |
| gil | :) Storing valuable data on it wasn't the plan | 00:44 |
| gil | it just happened that way! | 00:45 |
| snadge | theres no realtime kernel anymore? even generic? | 02:26 |
| bazhang | snadge, for sound editing and the like? | 02:35 |
| bazhang | !find rt-kernel | 02:36 |
| ubottu | Package/file rt-kernel does not exist in oneiric | 02:36 |
| snadge | yeah pretty much.. media is the reasoning behind it | 02:39 |
| snadge | i have built a htpc and was using natty on it.. now upgraded it to oneiric | 02:39 |
| snadge | which is great, because the hardware is amd zacate, quite new.. and it benefits from catalyst 10.6 (latest) and kernel > 2.6.38 | 02:40 |
| snadge | i happen to be using xbmc on it.. but found some documenation for mythtv, which suggest ways of improving performance on linux | 02:41 |
| snadge | one of them is using a pre-emptible kernel.. which doesn't appear to exist anymore | 02:54 |
| snadge | i bet theres a few audio enthusiasts who are peeved about that | 02:54 |
| snadge | and what about ubuntu studio? | 02:57 |
| snadge | ubuntu studio without a pre-emptible kernel.. is as useless as tits on a bull ;) | 02:57 |
| BluesKaj | snadge, I'm into audio , , but I've never heard of a pre-emptible kernel ..is some special audiofile / media OS version? | 02:59 |
| coz_ | I have never heard of it either | 03:00 |
| snadge | oversimplified explanation is that it reduces latency | 03:00 |
| snadge | so if you are doing realtime audio/video processing.. or midi.. and you want more precise timing | 03:00 |
| coz_ | http://www.linuxjournal.com/article/5600 | 03:00 |
| snadge | we're talking about milliseconds here.. if single milliseconds dont mean much to you | 03:00 |
| snadge | its less of a concern | 03:00 |
| snadge | but using video playback as an example.. which is something *everyone* can appreciate | 03:01 |
| snadge | it may mean eliminating the occasional skips/glitches during video playback | 03:01 |
| snadge | which i happen to notice, and it annoys the shit out of me | 03:01 |
| snadge | most people probably either wouldn't notice.. or wouldn't care if they did | 03:01 |
| coz_ | snadge, interesting... i will have to read up on this | 03:01 |
| snadge | or just accept occasional video jumps as "normal" | 03:02 |
| snadge | but it isnt.. i want a constant whatever fps the input video is in.. not 99% of them time.. that many fps, and sometimes more or less, depending on what the kernel feels like doing | 03:02 |
| coz_ | snadge, well this is going to be appropriate for music composition | 03:02 |
| snadge | anyway.. ubuntu used to come with an -rt kernel.. but it appears its no longer maintained | 03:03 |
| snadge | apparently it became too hard or something | 03:03 |
| coz_ | that's not good news... | 03:04 |
| coz_ | sounds like a step backwards | 03:04 |
| snadge | yeah im starting to think i should switch to gentoo for my media pc | 03:04 |
| snadge | i just can't be bothered with all that hassle though.. i just want to be able to install something and have it work | 03:04 |
| snadge | and ubuntu always seems to take two steps forwards.. and one step backwards | 03:05 |
| snadge | sometimes several steps backwards :p | 03:05 |
| coz_ | snadge, understood,, however, if ubuntu is going "back a few steps" leaving a great deal of people behind,, a dual boot might be good | 03:05 |
| snadge | there are numerous people stuck on older releases of ubuntu | 03:05 |
| BluesKaj | snadge, haven't experienced any glitches , and I don't know many audio guys/philes who are into midi stuff ...but I'm old so it could be a generational thing | 03:06 |
| snadge | midi is old school | 03:06 |
| BluesKaj | yup | 03:06 |
| coz_ | yeah but nice for certain things | 03:06 |
| snadge | im 30 myself.. and it predates my existance | 03:06 |
| snadge | just | 03:06 |
| snadge | its not a music format.. its actually a hardware protocol for music exchange between actual insruments and sequencers etc | 03:07 |
| coz_ | I did a few pieces that would be difficutlt to do in direct sound | 03:07 |
| snadge | just like serial | 03:07 |
| snadge | and its very timing sensitive | 03:07 |
| snadge | probably why nobody uses it anymore ;) | 03:07 |
| BluesKaj | heh well being an old musician , digital still sounds wrong to my ears but I've learnd to live with it | 03:08 |
| coz_ | BluesKaj, I understand that one :) | 03:08 |
| snadge | but video playback is something that even people who don't understand what kernel latency, pre-emptible and realtime priority means.. can appreciate | 03:09 |
| coz_ | BluesKaj, but digital,, I can have a complete recording studio on my system | 03:09 |
| snadge | im tempted to load windows 7 on my htpc.. and test xbmc on that | 03:09 |
| snadge | and contrast it with ubuntu on linux | 03:09 |
| coz_ | snadge, probably work better with XP | 03:10 |
| snadge | im just afraid that it will work much better.. and i'll end up ditching ubuntu because of it ;) | 03:10 |
| snadge | its brand new.. amd zacate system | 03:10 |
| coz_ | snadge, use what you need to get the work done | 03:10 |
| snadge | dual core 64bit 1.6ghz, 8 gig of ram | 03:10 |
| BluesKaj | we have a real recoring studio , all analog but we've mixed to digital for obvious reasons | 03:10 |
| coz_ | BluesKaj, we as in a band? | 03:11 |
| BluesKaj | yup , bunch of old country/blues/rockers... | 03:12 |
| coz_ | BluesKaj, excellent ! :) | 03:12 |
| BluesKaj | mostly a jamband tho | 03:12 |
| coz_ | BluesKaj, still,, wouldnt mind hearing something at some point,, I do all my work on the computer,, roland xv88.. mainly wanting to get into background music for commercials | 03:13 |
| coz_ | I am a little concerned about ubuntu for this purpose,,, I need to learn more abou ardour | 03:14 |
| BluesKaj | we haven't recorded in a while ..used to record on vhs-hifi, then A>D conversion with an old mac pc | 03:22 |
| snadge | i guess i can just go old school.. and build my own kernel | 03:22 |
| snadge | i think i still remember how to do that | 03:23 |
| snadge | and i'll just use the standard ubuntu conf.. and enabled the pre-emption/realtime options | 03:23 |
| snadge | since theres way too many options these days.. and i really cant be bothered customising things beyond that | 03:23 |
| BluesKaj | snadge, personally I think your making mountains out of mole hills ..latency on a kernel in this day and age ? what kind of pc are you running | 03:26 |
| snadge | a new one.. amd zacate.. dual core 1.6ghz 64bit | 03:27 |
| BluesKaj | coz_, I'm not much on keyboards /piano etc , being a drummer :) | 03:27 |
| snadge | from memory the scheduler defaults to 1000hz these days | 03:28 |
| coz_ | BluesKaj, I started out as a jazz drummer :) | 03:28 |
| snadge | which is a massive improvement over what it used to be.. i think 250hz | 03:28 |
| snadge | but its still not pre-emptible | 03:28 |
| snadge | meaning that some system events.. can consume hundreds of milliseconds | 03:28 |
| snadge | which during video playback, is unacceptable | 03:28 |
| snadge | even if that only happens once every few minutes | 03:28 |
| BluesKaj | I didn't ..had to learn some independence and patterns first :) | 03:29 |
| coz_ | snadge, not sure if it would make a difference,, but have you spoken to any of the kernel developers about this? | 03:29 |
| snadge | not yet no.. i've just been searching around on the net seeing what i could find | 03:30 |
| BluesKaj | ok have a good night guys ...later | 03:30 |
| coz_ | BluesKaj, jazz and rock drummer for about 15 years,, late nights,, decent pay,, too many pharmaceuticals :) killed our guitar player left | 03:30 |
| coz_ | gah | 03:30 |
| snadge | https://wiki.ubuntu.com/RealTime | 03:31 |
| snadge | ouch | 03:32 |
| snadge | god bless my pregnant gf .. i dont know if i actually meant that or am being sarcastic either ;) | 03:35 |
| kancerman | how to be rid of the gigantic 'notification tray + icons' I've been getting ?? | 05:27 |
| bkerensa | Anyone have success at any DE with panels on Ocelot? | 05:13 |
| kancerman | DE ?? | 05:24 |
| ior3k | e | 08:09 |
| dupondje | somebody around ? | 08:10 |
| nitesh | hello when i install fglrx driver i am getting this error SystemError: installArchives() failed | 08:44 |
| nitesh | anyway to fix it? | 08:45 |
| === oli is now known as Oli | ||
| htorque | Oli: \o/ | 09:17 |
| htorque | ;-) | 09:17 |
| Oli | ! | 09:17 |
| dupondje | All sleeping here ? | 09:43 |
| ikonia | no | 09:54 |
| dupondje | you have pbuilder-dist installed ? | 09:55 |
| ikonia | no | 09:56 |
| snadge | anyone know whats going on with xvba-video and libva for amd/fglrx support? | 12:19 |
| snadge | i should be an expert on it by now.. but the information on the net is fairly sparse | 12:19 |
| snadge | or i just dont know what i should be looking for | 12:19 |
| snadge | the latest code comes from a place splitted desktop systems.. maintained by this gwenole fellow | 12:19 |
| snadge | but its not distributed with ubuntu | 12:20 |
| snadge | it probably should be.. actually make that definitely should be | 12:20 |
| snadge | or if not, justification why not | 12:20 |
| snadge | im sure there are numerous people looking for h264/vc1 hardware video acceleration | 12:21 |
| snadge | who use the proprietary fglrx driver | 12:21 |
| snadge | think mythbuntu/xbmc.. gstreamer, ffmpeg.. etc etc | 12:21 |
| snadge | all depends on it for high definition content.. and smooth video playback | 12:22 |
| === knitt1 is now known as knittl | ||
| bjsnider | snadge, it cannot be easily distributed because the xvba driver code is proprietary at this point | 12:38 |
| snadge | bjsnider: does at this point mean that xvba-video will eventually become distributable? | 13:03 |
| bjsnider | snadge, it could still be distributed, but not the source code. so it would have to be in ubuntu's restricted repository, and they'd have to sign agreements not to reveal the code to anyone with amd and so forth and so on | 13:38 |
| bjsnider | the last i heard it was so unstable and inconsistent that it would be almost pointless to include it | 14:00 |
| bjsnider | some cards work others don't with little or no warning or predictability etc. | 14:00 |
| bjsnider | it would be far better to use ffmpeg-mt with a decent multi-core cpu | 14:00 |
| BluesKaj | Hiyas | 14:28 |
| BluesKaj | bjsnider, have you tried ffmpeg-mt ? | 14:35 |
| bjsnider | BluesKaj, i have. it works | 14:38 |
| bjsnider | it's part of libav now so anyone can try it | 14:39 |
| bjsnider | ubuntu is going to be using libav, not ffmpeg | 14:39 |
| BluesKaj | I have a plain jane dual core cpu , dont imagine ffmpeg-mt will make much diff , since I havent seen any video or audio probs so far. | 14:50 |
| BluesKaj | mostly use vlc , tried xbmc but I don't like it's window dreessing type interface ...too clunky as well. | 14:51 |
| bjsnider | BluesKaj, it would make a lot of difference actually | 14:59 |
| bjsnider | if you're talking about hi-def x264 at 1080p it would make a huge difference | 15:00 |
| bjsnider | if you're talking about something like xvid at 480p and whatnot, that doesn't require much horsepower to play regardless | 15:01 |
| BluesKaj | bjsnider, this pc is our media server connected by dvi/hdmi to our plasma tv , but we haven't experienced any true Hidef except for our Bell sat HD service (which seems quite compressed ), and we don't own a bluray player or cdrom . I have tried a few mkv which claim to be 720p , and one or two 1080i , but due our bandwidth cap I haven't tried any thing above 6G in size | 15:07 |
| bjsnider | bell compresses every signal to 720p at a low bitrate | 15:13 |
| bjsnider | you should try to get rid of the badnwidth cap | 15:14 |
| BluesKaj | bjsnider, I have 105G cap with bell internet, my only other option is eastlink , which has faster internet but otherwise is about the same pricewise, hardly an inentive o swith. | 15:19 |
| BluesKaj | to switch | 15:19 |
| BluesKaj | damnkb | 15:19 |
| bjsnider | and is uncapped | 15:20 |
| bjsnider | faster and uncapped is an incentive | 15:20 |
| BluesKaj | it has caps | 15:24 |
| BluesKaj | eastlink does | 15:24 |
| patdk-wk | Unlimited internet (upto 105gigs) for $49.95 a month :) | 15:25 |
| BluesKaj | yup | 15:25 |
| Daekdroom | Oh my God a contradiction. | 15:25 |
| Daekdroom | (also known as marketing) | 15:25 |
| patdk-wk | no one will ever use more than 105gigs | 15:25 |
| patdk-wk | unless they have a 200gig harddrive and uses a online backup service :) | 15:26 |
| Daekdroom | I could use 100Gig with a 320GB harddrive and no backup service. | 15:26 |
| BluesKaj | if you download hidef movies it doesn't take long | 15:26 |
| Daekdroom | Precisely. | 15:26 |
| patdk-wk | blueskaj, but is that legal? | 15:26 |
| patdk-wk | takes a few netflix to do that | 15:27 |
| BluesKaj | it's in limbo here | 15:27 |
| patdk-wk | but ya, I download highdef anime, normally 20-30gigs each | 15:27 |
| Daekdroom | The ISP I used to have had a cap but never enforced it. | 15:27 |
| Daekdroom | It did for like one month and then stopped. | 15:27 |
| BluesKaj | we jst got netflix last winter, but we're not impressed ,,, tried it for a month , found one good movie | 15:28 |
| patdk-wk | ya, I find it about the same | 15:28 |
| patdk-wk | but its nice for the kids though | 15:28 |
| patdk-wk | can put on random kid crap easily | 15:28 |
| BluesKaj | right ..kids are grown and gone here | 15:29 |
| BluesKaj | does ffmpeg-mt exist side by side with ffpmeg or do need to replace it with -mt ? | 15:38 |
| BluesKaj | bjsnider, ^ | 15:38 |
| bjsnider | BluesKaj, it was merged, so it's the same thing if you have a new enough version of ffmpeg or libav | 15:59 |
| saam | hello, when I install fglrx form jockey in oneiric it says SystemError: installArchives() failed But a recent changelog in jockey says multi arch problem with fglrx solved | 16:05 |
| BluesKaj | bjsnider, ok I suppose since I saw ffmpeg was upgraded on 11.10 it's the newest version | 16:06 |
| === KNUBBIG_ is now known as KNUBBIG | ||
| === KNUBBIG is now known as KNUBBIG_ | ||
| mandara | when I get new mail in Thunderbird, envelope doesn't become green/blue. Is this a bug or do I need to install something? | 17:01 |
| === rcmaehl_fallback is now known as rcmaehl | ||
| GTRsdk | has anyone else noticed thunderbird freezing when trying to load an encrypted message? | 17:36 |
| Ampelbein | GTRsdk: works here with enigmail | 17:37 |
| GTRsdk | it just began working again | 17:38 |
| GTRsdk | Ampelbein, I think it may be something with the only 1 GB of RAM | 17:38 |
| Ampelbein | GTRsdk: no, probably your gpg revalidated the trustDB. | 17:39 |
| Ampelbein | GTRsdk: that looks like thunderbird hanging but it isn't actually hanging. I saw a bug for this, let me check | 17:39 |
| Ampelbein | hmm, can't find the bug I thought I remember. | 17:46 |
| om26er_ | the micro notify-osd it that a bug or evolution? | 18:03 |
| Daekdroom | om26er_, what micro notify-osd? | 18:19 |
| GTRsdk | I can't use the open link in browser feature in xchat or thunderbird. Is this a bug in Firefox? | 18:28 |
| GTRsdk | I am using Unity 2d, if that makes a difference | 18:28 |
| om26er_ | GTRsdk, i think gnome-control-center might be to blame | 18:46 |
| GTRsdk | a setting is wrong? | 18:47 |
| om26er_ | Daekdroom, http://imagebin.org/index.php?mode=image&id=161565 | 18:56 |
| Daekdroom | Odd. It's normal in here. | 18:57 |
| === KNUBBIG_ is now known as KNUBBIG | ||
| === yofel_ is now known as yofel | ||
| semitones | will oneiric be LTS? | 21:01 |
| GTRsdk | no | 21:01 |
| GTRsdk | but 12.04 (the one after Oneiric) will | 21:02 |
| === rcmaehl_fallback is now known as rcmaehl | ||
| === pace_t_zulu_ is now known as pace_t_zulu | ||
| === KNUBBIG is now known as KNUBBIG_ | ||
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