IRC chat logs for #ltsp on irc.freenode.net (webchat)


Channel log from 5 July 2011   (all times are UTC)

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12:53
<mgariepy>
good morning everyone
12:53
<muppis>
I'm not sure about that good part. :)
12:54
<rileyp>
http://pastebin.com/RYw1jzQp dmesg output my diskless client has problems after a suspend Im using mythbuntu disklesss
12:55
it resumes to a gui but nothing after that works except the mouse...
12:59
<muppis>
rileyp, mouse is handled locally runnign X and everything else is tried load over non-existing connection.
12:59
When system suspends all network connections will die and that's resuming fails.
12:59
+why
13:00
<Hyperbyte>
You can't suspend thin clients, can you? They loose their nbd mount?
13:00
Yeah
13:00
Spoke too soon. =)
13:03
<rileyp>
so is there a wway of fixing it or is that the bottom line no suspemd
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13:06
<muppis>
I can't say it is easy, but can be possbile by re-establishing nbd connection right after eth link is up but before nbd requests any data. So it would easier not to try suspend at all.
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13:09
<rileyp>
so if i were to create a script in /etc/pm/sleep.d/ that could delay nbd requests until eth0 is up I would be on course
13:10
<muppis>
Yes. Not just eth0, but nbd socket also.
13:10
<rileyp>
or would it need to be in the heart of operations ( the place I know nothing about....)
13:11
so the woe starts here 102.865729] nbd0: Attempted send on closed socket
13:12
<muppis>
Yes.
13:12
<rileyp>
thing is line before in fstab says eht0 is up
13:13
<Hyperbyte>
You know, if nbd doesn't time out, your ssh will
13:13
<rileyp>
how do i go about getting nbd back up?
13:13
<Hyperbyte>
You'd need to keep both nbd and ssh active.
13:14
<muppis>
I think ssh can easier re-establish.
13:14
<Hyperbyte>
nbd you could restore, but then all your open file handles would be null, which probably still cause your system to hang
13:14
ssh you could also restore, but all your open programs etc will be gone
13:14
Or am I completely off here?
13:15
<rileyp>
I dont care if I loose all my sessions i'd just love teh 15 second resume time
13:15
<Hyperbyte>
Well then just killall X in your sleep.d script?
13:15
And resume nbd, yeah.
13:16
<rileyp>
Im happy to do that but how will that help and how do I resume nbd i really appreciate you help
13:17
<Hyperbyte>
Well I'm not sure that you can, actually
13:17
See, the whole root filesystem is mounted via nbd
13:17
<rileyp>
ssh wont run after a resume unless I have it running when I suspend as the rogram is on the harddrive on teh server not in ram...
13:17
<Hyperbyte>
If nbd is gone, / is gone. So no command whatsoever, would work.
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13:19
<Hyperbyte>
And all open file handles of all software would be null... I doubt your system could recover from that, even if you somehow get nbd resumed.
13:19
Why do you want your thin client to suspend, though?
13:19
<rileyp>
If I left ssh running and then used ssh to get nbd back.....
13:20
<Hyperbyte>
SSH can't be running in suspend. Also, if a command won't work on a local prompt, it certainly won't work via SSH.
13:20
<rileyp>
dmesg works on a prompt
13:21
<Hyperbyte>
Really? That's interesting. What if you ls / ?
13:21
<rileyp>
after a suspend and I am able to save items to my overlay dir after a suspend
13:21
<Hyperbyte>
Can you browse the root filesystem?
13:22
<rileyp>
no nothing that good
13:23
I ran mousepad prior to suspending and after the resume I ran dmesg and cut and paste into mousepad and saved it. into the overlay home folder
13:24
i also ran ifconfig and it worked and in a terminal was able to run nano as another instance was presenr
13:24
<Hyperbyte>
How about mount?
13:24
<rileyp>
present sorry
13:24
I have not tried mount but that ssound like a sweet idea doesnt it
13:25
you so clever I feel stupid
13:25
<muppis>
Would nfs be easier than nbd to reconnect?
13:25
<Hyperbyte>
<-- noob
13:25
<rileyp>
um sudo does not work though... so I wont be mounting much
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13:27
<rileyp>
muppis I have no idea Im happy to do what needs doing
13:27
<Hyperbyte>
rileyp, well, any sleep.d script you put the mount command in would be executed as root, so that's not a problem.
13:28
<rileyp>
yes good point
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13:29
<rileyp>
so the file to mount would be /opt/ltsp/i386.img would it?
13:31
<Hyperbyte>
I have no idea how to mount nbd images
13:31
<rileyp>
hmm nor do I
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13:32
<muppis>
bd-client server-ip server-port# filename/filesystem
13:32
Paste-error, missing n at start.
13:33
<rileyp>
/etc/exports on my server has /var/cache/mythbuntu-diskless/overlay/ 192.168.1.0/25(rw,no_root_squash,async,no_subtree_check)
13:33
but that is nfs
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13:34
<rileyp>
thanks muppis so for me that would be 192.168.1.10 2000 /opt/ltsp/i386.img would that be right
13:35
<muppis>
nbd-client just creates local block device, so it must be mounted to get used.
13:35
rileyp, yes.
13:35
<rileyp>
is there a : between ip and port?
13:35
<muppis>
Nope.
13:35
<rileyp>
space ok that sound great
13:36
do I need anything after like defaults 1 2 etc
13:37
so in my sleep.d script it would be mount 192.168.1.10 2000 /opt/ltsp/i386.img
13:38
dont I need a fs as well as the image
13:38
<muppis>
First use nbd-client to get that image as local block device and then mount that one.
13:38
http://www.thegeekstuff.com/2009/02/nbd-tutorial-network-block-device-jumpstart-guide/
13:39
<Hyperbyte>
muppis, hey that's cool. I never knew nbd worked like that. I thought it just mounted the image directly
13:41
<muppis>
Well, doesn't name say it? Network Block Device.
13:41
I think it can be anything what it is handled as block device.
13:45
<rileyp>
I have run dkpg reconfigure ndb-server on 192.168.1.10 which is my server and have added /opt/ltsp/i386.img on port 2000 but when looking at your link it appears I need to do more than that on the server side. Unless I am mistaken
13:47
<Hyperbyte>
muppis, yeah, I just never knew nbd = network block device. :-)
13:47
Actually you don't need to do anything on the server side, you need to make changes in /opt/ltsp/i386
13:47
<muppis>
rileyp, I think you're mistaken, as you need only do reconnecting and remounting.
13:48
But yes, to make changes permanent, you need to do them to chroot and rebuild image.
13:49
<rileyp>
Perform the following steps in the client machine, where you like to access the remote storage device. 1. Install nbd-client If this is a prgram I would ned to get it somehow as it wont be there on resume
13:49
<muppis>
nbd-client should be there already.
13:49
<rileyp>
Im cool with updating of teh client image stuff that bit is fine
13:50
<Hyperbyte>
muppis, you sure? Isn't nbd-client lost with the nbd device?
13:50
<muppis>
Hyperbyte, good point.
13:50
<Hyperbyte>
Could be still there though, if it's in memory somehow.
13:51
I was already surprised the 'dmesg' command still works.
13:51
It's worth investigating if nbd-client works. If it doesn't, you could put it in /tmp/ before suspend, as a possible solution maybe. Not sure if it needs libraries or anything.
13:52
<muppis>
If nbd-proxy is used, then nbd-client command could be triggered before suspend, so it get loaded to client before shutdown.
13:52
<Hyperbyte>
Either way, I still say it's a hundred times easier to just leave the machine on.
13:52
<rileyp>
ok so if ndb client is already there I create script in sleep.d to be acted on straight after network is up
13:53
<Hyperbyte>
rileyp, that's a good start, yes.
13:53
<rileyp>
other option is to resume and run an sleep.d scripts taht tells machine to reboot thus fixing all problems
13:54
<Hyperbyte>
rileyp, that's your choice. :)
13:54
<muppis>
rileyp, little bit looses purpose of suspend, if machine is rebooted instead of real resume.
13:55
<rileyp>
sorry runs a command in sleep.d script that tells machine to reboot after the resume .
13:56
yes I know muppis but in honesty Im usinga projector and it teakes 45 seconds to fire up anyway and I could use the sleep.d reboot call to wake teh projector and amp at the same time
13:56
<Hyperbyte>
rileyp, why are you suspending this machine anyway?
13:57
<rileyp>
so mrs rileyp doesnt harp about wasting electricity
13:57
waf
13:57
<muppis>
rileyp, I see the point.
13:58
<rileyp>
its a hard one to explain but very common
13:58
<Hyperbyte>
Why not just shutdown?
13:58
<rileyp>
speaking of waf I best hit the hay
13:59
<Hyperbyte>
And make some call during bootup to start the projector and amp?
13:59
<muppis>
Hyperbyte, starting machine doesn't wake up the projector.
13:59
<rileyp>
Hyperbyte: remote wont wake a cold machine
13:59
usb wake only work from suspend
13:59
<Hyperbyte>
rileyp, ah :/
13:59
rileyp, you could possibly configure BIOS to power up on keypress
14:00
<muppis>
And during projector warmup time machine itself can be easily rebooted.
14:00
<Hyperbyte>
But else wake project & amp & reboot from sleep.d is good plan, yeah.
14:00
<rileyp>
I have ir blasters on projector and amp so i hit remote and everything starts
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14:01
<rileyp>
hmm but in other room wher tv is and other front end suspend would be sweet
14:01
with no disk
14:01
and 15 second resume
14:03
<muppis>
I had once in my mind to make chroot as local, so nbd would not be used at all. That could help in suspend problem.
14:03
<rileyp>
Thanks fellas I've got to go to bed. Muppis yes with 4 gig of ram I could just put the image in ram?
14:04
<muppis>
rileyp, yes, but you need to get it loaded to client somehow.
14:05
<rileyp>
I have to go... thanks again
14:05
<muppis>
No problem.
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14:07
<muppis>
This converstaion gives me an idea how manage locally loaded client so wlan can be used as connection.
14:07
<Hyperbyte>
:o
14:09
<muppis>
As I was lazy when moved to this house and didn't wire it up so I used wlan links, but 54g are terribly slow to start client.
14:09
s/are/is/s
14:10
And 150n ain't that better..
14:16
And I've made HTPC using LTSP and it works fine, when gets started up corretly.
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14:46
<TheMatrix3000>
anyone here using iTalc?
14:46
I am having issues seting it up
14:59
<andygraybeal>
are you in ubuntu?
14:59
alkisg says sometimes it works and sometimes it doesn't
15:00
it's getting old and i guess isn't being updated
15:00
i'm using it with ubuntu 10.04 and it is working
15:00
he says that 10.04 or not it still sometimes doesn't workl
15:00
<TheMatrix3000>
yes, im on ubuntu 11.04
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15:18
<pmatulis>
should arm-based clients work fine with the latest ltsp?
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15:57
<TheMatrix3000>
yea, i can't get italc working
15:57
something with the authentication keys
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16:01
<Roasted>
italc has always given me issues too, actually
16:01
on both windows and linux. :(
16:03
<andygraybeal>
TheMatrix3000, aah authentication keys is a prob for me to -- you have to be logged in as an admin
16:03
auth keys don't work when i'm logged in as my normal user account
16:04
well, this is in my case, i should say. ymmv
16:05
<TheMatrix3000>
i am in a sudo account
16:06
i can just install it on teh server and not have it installed on the client chmod right
16:06
<andygraybeal>
yea, i use my sudo accuont and it works
16:06
<TheMatrix3000>
chroot*
16:06
<andygraybeal>
TheMatrix3000, i don't think you install it on the chroot, correct.
16:06
<TheMatrix3000>
ok
16:06
let me retry then
16:07
<andygraybeal>
don't take my word for any of this bro, i'm very very clueless.
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16:56
<tl1000s77>
is anyone here having issues with java apps on ltsp clients?
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17:11
<Hyperbyte>
!ask
17:11
<ltsp>
Hyperbyte: ask: Don't ask to ask a question! Simply ask the question, and wait for someone to answer you. Most people active in the channel are very busy during the day, but stick around and eventually someone will be around to help you..
17:11
<Hyperbyte>
For starts, define 'issues'.
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17:22
<andygraybeal>
TheMatrix3000, how is it going man.. did you get that crap to work?
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18:44
<tl1000s77>
Hi everyone
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19:37
<pmatulis>
tl1000s77: hi
19:40
<tl1000s77>
pmatulis: hello
19:41
pmatulis: have you ever had any issues running java applications in a ltsp environment?
19:42
<pmatulis>
tl1000s77: what kind of app are you using?
19:43
<tl1000s77>
pmatulis: it's a web based app that's giving me issues. I don't know if it's Firefox that's the problem or java
19:43
<pmatulis>
tl1000s77: what kind of java are you using on the client (which would be the ltsp server)?
19:43
tl1000s77: openjdk or sun java?
19:44
tl1000s77: testing both would be something to try
19:44
tl1000s77: you could also try using a different browser, like chromium-browser
19:45
tl1000s77: and the app itself should be logging somewhere as well, did you look?
19:46
<tl1000s77>
pmatulis: That's the thing...I can't find where it's logging to
19:46
pmatulis: I'm pretty sure it's openjdk
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19:47
<pmatulis>
tl1000s77: dpkg -l '*jdk*'
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19:52
<alkisg>
Has anyone seen that? http://packages.debian.org/wheezy/xnbd-client
19:53
"Network Block Device client with support for live migration" , better performance etc
19:55
It also has a proxy mode
19:57
<vagrantc>
alkisg: yeah, was wondering how well it works
19:58
<alkisg>
I wonder why they needed to fork though
19:58
" (basic) snapshot support" => and also what that means
20:00
--recovery-command-reboot => that was also asked by some people here, to reboot hanged clients
20:01
And maybe --recovery-command could help with the reconnection
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20:04
<Roasted>
What's up guys? I see that in 11.04 LTSP using Ubuntu has two folders in ldm and themes. It seems to be using the "LTSP" folder instead of "Ubuntu". How can I default it to use the other? I like that login theme more.
20:05
<vagrantc>
sudo ltsp-chroot update-alternatives --config ldm-theme
20:05
er, ubuntu doesn't have ltsp-chroot yet ...
20:05
sudo chroot /opt/ltsp/i386 update-alternatives --config ldm-theme
20:05
<alkisg>
It's inside some /usr/share dir...
20:06
<Roasted>
opt/ltsp/i386/usr/share/ldm/themes
20:06
within "themes" is ubuntu and ltsp
20:06
<vagrantc>
or even easier ...
20:06
<Roasted>
its using ltsp yet I want to use ubuntu :P
20:06
<vagrantc>
LDM_THEME=Ubuntu in lts.conf
20:06
i forgot about that option
20:06
<Roasted>
oh nice
20:06
thanks for that
20:07
<vagrantc>
though that's odd that it wouldn't default to the other theme
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20:07
<Roasted>
it looks like lts.conf exists by default in 11.04 now
20:07
it didn't before
20:08
and ldm_theme is already in lts.conf, but its entry is "edubuntu"
20:08
I changed it to ubuntu, we'll see if that's the fix
20:08
alkisg, I did a presentation on how we're using linux at work at a tech college a few weeks ago. LTSP was a hot item on the list.
20:09
I scanned through their school-issued Ubuntu book and sure enough, LTSP was in there with several developers names. Yours caught my eye due to your nick here.
20:09
<alkisg>
LTSP has a default lts.conf? Where, in /var/lib/tftpboot/ltsp/i386? Can you pastebin it?
20:09
:)
20:09
<Roasted>
its from the 11.04 edubuntu installer. I didn't have this in 10.10 edubuntu
20:09
but sure, I can, give me one moment
20:10
alkisg, http://tinypaste.com/2f5387
20:10
except the default was edubuntu instead of ubuntu. that was my only alteration.
20:10
this is, otherwise, a brand new vanilla install.
20:11
<alkisg>
...where's the close button on that ad? :D
20:11
<Roasted>
on what ad?
20:11
<alkisg>
Hehe tinypaste randomly decides to pop up ads
20:11
<Roasted>
ah
20:11
yeah I had it too
20:12
<alkisg>
And my screen didn't have enough height to show the close button
20:12
So I had to close the whole page + reopen it :D
20:12
<Roasted>
can you see it now?
20:12
<alkisg>
Yes, but you just put that LDM_THEME there, didn't you?
20:12
So it only had comments by default?
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20:12
<Roasted>
I did not.
20:12
It was LDM_THEME=edubuntu
20:12
<alkisg>
Ah, I see
20:12
<Roasted>
I just removed "ed" and updated the chroot
20:12
rebooted, and its using the LDM theme I want.
20:13
the default LTSP theme is the blue thing with yellow text.
20:13
<alkisg>
You don't need to reboot when you change lts.conf
20:13
And you can probably just remove LDM_THEME completely
20:13
<Roasted>
I know. I just rebooted the client.
20:13
after updating the chroot.
20:13
<alkisg>
*eeerh I mean you don't have to update the chroot. ok
20:13
<Roasted>
ahh, wasn't aware of that. thanks :)
20:13
<alkisg>
Also it's strange that the edubuntu theme was missing
20:14
(and you got the default LTSP theme instead)
20:14
<Roasted>
I assume it's due to the LDM theme being named "ubuntu" and the LDM_THEME entry was "edubuntu"
20:14
no?
20:14
<alkisg>
Did you run ltsp-build-client manually after the installation?
20:14
<Roasted>
yes. ltsp-build-client --arch i386
20:14
<alkisg>
Right, that's what hapenned then
20:14
<Roasted>
oops...
20:14
<alkisg>
Edubuntu created a chroot for you
20:15
You deleted it and created a new one, but kept the edubuntu lts.conf
20:15
<Roasted>
alkisg, stop being a genius.
20:15
<alkisg>
So in your new chroot you didn't have the edubuntu theme
20:15
<Roasted>
like, for real.
20:15
<alkisg>
(I imagine, I haven't seen an edubuntu chroot recently)
20:15
<Roasted>
but yeah I did an rm -rf of it
20:15
of the old chroot
20:15
then I built a new one
20:16
oh boy. my chroot has unity.
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20:30
<Roasted>
I'm reading bug reports that it was fixed in 11.04 where the clients use the same default desktop environment as the server. Would the latest 11.04 on edubuntu's site not be updated for some reason?
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20:35
<Roasted>
could always drop to 10.04 and use an LTS too, where unity wont be found till the dust clears more
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