IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 19 June 2013 (all times are UTC)
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| 00:29 | <scholar216> Has anyone found a case that can secure the cables so Eve can't walk by your public thin client and install a hardware keylogger?
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| 00:29 | I am thinking about the treatment room at your local doctor's office
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| 03:55 | <map7> alkisg, Do you get an error when resuming a session in x2go?
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| 03:55 | <alkisg> Nope
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| 03:56 | Although I do that rarely, I usually use logout
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| 03:57 | <map7> I've also heard this problem only happens when trying to reconnect within 5 minutes of suspending
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| 03:57 | So it's awkward to test
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| 03:57 | <alkisg> Hm, I don't think I tried that, I used "resume session" only a couple of times, and it was hours later....
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| 03:58 | <map7> If it's easy for you to test could you give it a go?
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| 03:58 | Login, suspend, then try and resume within 5 minutes
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| 03:59 | * alkisg is a bit too busy until next week, to try stuff... | |
| 03:59 | <map7> Other than this one issue X2Go looks great
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| 03:59 | <alkisg> But you could talk about it in the x2go mailing list...
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| 03:59 | <map7> That's cool
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| 06:31 | <Enslaver> Hola all
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| 06:33 | Sorry i've been awol for a while, kinda lost my job and have been a bit down.
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| 07:44 | <Hyperbyte> Enslaver, you 'kinda' lost your job? :o
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| 07:44 | What does that mean?
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| 08:13 | <Burned1> hi all o/
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| 09:02 | <Hyperbyte> Burned1, hi
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| 09:34 | <Gremble> Error: Exported device is too big for
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| 09:34 | me. Get 64-bit machine :-(
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| 09:34 | <Burned1> hello!
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| 09:34 | <Gremble> ^ what's that all about then?
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| 09:35 | seems there's an issue with the nbi.img appears much bigger than it actually is
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| 09:35 | http://www.mail-archive.com/nbd-general@lists.sourceforge.net/msg01019.html
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| 09:35 | this post suggest the fix is fairly simple, but I don't know how to implement it in the LTSP install I have
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| 09:38 | anyone else had this?
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| 09:40 | I've a 64-bit host with a 32-bit client, and have built the client as 32-bit
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| 09:41 | its Debian wheezy system
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| 09:53 | <Joanet> Hi all. I'm having random client hangs at my lab. IT has 12 computers running as thin clients connecting to Edubuntu+LTSP installed over VMWare. All my network is running at 100Mbps. Is there any way to speed up LTSP to avoid client hangs?
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| 09:53 | I know I have to move to Gigabit, but no money at the moment :)
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| 09:55 | <markit> Joanet: clients should not hang, just run slower if is a bandwidth problem (that you can mitigate with 2 nic in bound from your ltsp to the switch)
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| 09:56 | probably ltsp vm is hanging...
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| 09:56 | btw, why using proprietary program for virtualization? have a look at Proxmox project
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| 09:56 | free yourself ;P
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| 09:57 | <Joanet> markit: when some client get hanged, the rest of the client still remain working, but I have to push the client power button to switch it off and start it again, and it works like a charm...
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| 09:57 | also, I'm running Vmware hypervisor, the free version
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| 09:57 | <markit> Joanet: is gratis, not Free(dom)
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| 09:58 | they should pay you to be enslaved ;P
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| 09:58 | <Joanet> i know i know :)
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| 09:58 | <markit> Joanet: seems a connection problem then, maybe nic hangs? Cabling badly connected? Video driver hangs?
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| 09:58 | memory corrupted?
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| 09:59 | have you run extensive (memtest) tests on the clients? I discovered some with bad RAM banks when I did with old hardware
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| 09:59 | or the switch hangs... latest firmware? well cooled?
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| 09:59 | it could be anything
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| 10:00 | <Joanet> I'm running pentium 4 computers... perhaps the memory is not fine...
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| 10:00 | old computers...
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| 10:01 | <markit> I've a lab with 20 P4, were working as thin, now expanded to 1.5gb and work as fat
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| 10:01 | <Joanet> I'll do a memory check, but I think the problem is network-related because as soon as the connected computers number grows they start to fail
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| 10:02 | and also, randomly
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| 10:02 | aure you using gig o 100m?
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| 10:03 | also, did you customize anything in ltsp.conf?
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| 10:06 | markit: how can I check if i'm having video driver problems?
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| 10:10 | <alkisg> Joanet: which graphics card on the client? lspci -nn -k | grep -A 2 VGA, on a localxterm
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| 10:10 | !localxterm
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| 10:10 | <ltsp`> localxterm: Any applications that you launch on a thin client actually runs on the server, not on the client itself. If you want to open a program on the client locally, you can type 'ltsp-localapps <program>' in a run dialog or in a terminal. For example, 'ltsp-localapps xterm' to open a terminal running on the client.
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| 10:11 | <Joanet> alkisg: thanks. I'll check it now
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| 10:11 | alkisg: also, when I try to use Epoptes the clients start to hang
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| 10:12 | <alkisg> Joanet: do they also hang if they're not logged in?
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| 10:12 | If you have epoptes installed, you can very easily benchmark your network...
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| 10:12 | http://www.epoptes.org/documentation/lan-benchmark
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| 10:14 | <Joanet> alkisg: I think they only get hanged when they are logged, but I cannot tell if it is really really true
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| 10:14 | <alkisg> Can you boot all your clients now and leave them at the login prompt, and try a few things from the server via epoptes?
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| 10:15 | <Joanet> using 100mbit and thin clients, what is the maximum number of clients?
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| 10:15 | alkisg: I can do it
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| 10:15 | <markit> back, reading
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| 10:16 | <Joanet> what do you want to do? Now I cannot run them because some computers are being used
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| 10:16 | <alkisg> With 100mbit and thin clients, and depending on the usage and your definition of "acceptable performance", maybe up to 5... but you should really use either trunking (bonding) or a switch with at least 1 gigabit port
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| 10:17 | First, from epoptes, right click on one click and then go to 'execute > open terminal > root, locally'
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| 10:17 | There, run: lspci -nn -k | grep -A 2 VGA
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| 10:17 | ...and paste the output here (select, and then middle click here to paste)
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| 10:17 | <markit> Joanet: in lts.conf I did LDM_DIRECTX=True and X_SMART_COLOR_DEPTH=False and X_COLOR_DEPTH = 24 and LDM_LIMIT_ONE_SESSION=True
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| 10:17 | hi alkisg :) how are you?
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| 10:18 | <alkisg> Hi markit! All fine, although quite busy! You?
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| 10:19 | <Joanet> alkisg: I have to go to the lab. I'll connect from there and paste the results.
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| 10:20 | <alkisg> ok
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| 10:20 | <markit> the same :) Only troubles this year with ltsp lab at elementary schols has been the printer, so great success (but I need to understand that issue for the new year)
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| 10:20 | <Joanet> markit: I'll also check the settings
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| 10:20 | moving... see you in 5 minutes
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| 10:32 | <Joanet> Hi again.
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| 10:33 | <alkisg> (01:17:11 μμ) alkisg: First, from epoptes, right click on one click and then go to 'execute > open terminal > root, locally'
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| 10:33 | (01:17:19 μμ) alkisg: There, run: lspci -nn -k | grep -A 2 VGA
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| 10:33 | (01:17:29 μμ) alkisg: ...and paste the output here (select, and then middle click here to paste)
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| 10:33 | *on one client
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| 10:33 | <Joanet> alkisg: now I have all computers started waiting for login, and logged only on one client
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| 10:33 | now I'll do the tests
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| 10:33 | <alkisg> Let's check the vga first, and then you'll do a network benchmar
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| 10:33 | k
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| 10:35 | <Gremble> I'm still getting this boot up problem, anyone else get it?
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| 10:38 | <Joanet> alkisg: I get no prompt when socat window is opened...
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| 10:38 | <alkisg> Joanet: try it again a couple of times
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| 10:39 | Gremble: grep -rv '^#' /etc/nbd*
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| 10:39 | Put the result to pastebin
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| 10:39 | <Gremble> alkisg, on host or client?
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| 10:40 | alkisg, host of course, sorry
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| 10:40 | <alkisg> Gremble: host
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| 10:40 | <Gremble> :)
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| 10:40 | <Joanet> alkisg: launched 4 times, but no prompt on any of 4 socat windows
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| 10:41 | <alkisg> Hmmm...
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| 10:41 | <Joanet> I can launch xterm locally, but not using epoptes
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| 10:41 | <alkisg> Joanet: ...try the other option, root, remotely
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| 10:41 | <Gremble> alkisg, http://pastebin.com/JKSGmYMd
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| 10:41 | <alkisg> Gremble: are you using the greek schools ppa?
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| 10:42 | Ah, wheezy, never mind
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| 10:42 | Why are you using nbd for wheezy, instead of the default nfs?
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| 10:42 | <Gremble> well, its running on vserver
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| 10:42 | <Joanet> alkisg: using root remotely no window is shown
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| 10:43 | <alkisg> Joanet: look on the client for the window, not on the server
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| 10:43 | <Gremble> is not NBD a good option with some advantages alkisg ?
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| 10:43 | <alkisg> No windows there either?
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| 10:43 | Gremble: nbd offers a bit better disk speed, but for thin clients it doesn't matter much
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| 10:43 | <Joanet> no window :(
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| 10:43 | <alkisg> If you're using many localapps or fat clients, then it makes more sense to switch to nbd...
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| 10:43 | <Joanet> do you want to use localapps?
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| 10:44 | <Gremble> alkisg, I've just spotted this:
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| 10:44 | Jun 19 11:42:49 platinum nbd_server[28997]: Unauthorized client
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| 10:44 | damn
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| 10:44 | <alkisg> Gremble: you should *not* have an /etc/ltsp/nbd-server.allow file, check for it
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| 10:45 | <Gremble> I created it :(
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| 10:45 | <alkisg> Joanet: can we share your server screen? I'd like to see the epoptes issue... x11vnc -connect plinet.ioa.sch.gr from the server
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| 10:45 | <Joanet> now i'm rebooting the client
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| 10:48 | <alkisg> Joanet: you didn't install epoptes-client in the chroot, that was the issue
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| 10:48 | So you don't see the clients before login
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| 10:49 | Put the "trans" password there, and press enter
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| 10:52 | Joanet: when ltsp-update-image finishes, reboot your clients
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| 10:52 | Gremble: (delete the file and reboot the clients, are they ok now?)
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| 10:52 | <Joanet> alkisg:
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| 10:53 | alkisg: all of them?
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| 10:53 | <alkisg> Joanet: yes, except maybe for those that have people working on them
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| 10:53 | <Gremble> alkisg, thankyou
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| 10:53 | that works now
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| 10:53 | GNOME3 going to fallback mode, which is fine
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| 10:54 | <Joanet> alkisg: ok, i'll reboot them now
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| 11:00 | <alkisg> Joanet: meh we needed iperf in the chroot too... we'll reboot them again via epoptes once ltsp-update-image finishes
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| 11:00 | Your graphics cards are intel 8xx, with very bad drivers
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| 11:00 | It's possible that you do have graphics problems... using a newer xorg might help
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| 11:01 | Joanet: did you reboot/disconnect the clients? or the networking failed?
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| 11:01 | <Joanet> i'm disconnecting them
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| 11:02 | now I'll reboot again
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| 11:02 | <alkisg> We could reboot all of them with 1 epoptes click :)
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| 11:03 | <Joanet> although any of them have logged?
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| 11:04 | <Burned1> alkisg, can you help me to create a share for ltsp users, with r/w access only to the corresponding directory?
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| 11:04 | sorry for my eng :(
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| 11:04 | <alkisg> Joanet: yup, without caring if they're logged in or not
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| 11:05 | <Joanet> before I cannot se them until they logged...
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| 11:05 | <alkisg> Burned1: that's not an ltsp issue... try your #distro channel, or wait in case someone wants to give feedback here
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| 11:05 | Joanet: that's because you didn't read epoptes.org/installation, you didn't have epoptes-client in the chroot
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| 11:05 | <Burned1> uhh :(
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| 11:05 | <alkisg> OK let's check your LAN...
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| 11:05 | <Joanet> alkisg: all clients started
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| 11:07 | <alkisg> Joanet: your networking sucks, each client gets only 5-10 mbps while it should be getting 50-100, but other than that, it's stable
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| 11:07 | Log in some client...
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| 11:07 | <Joanet> logged
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| 11:08 | I know my network is very slow... but now my boss has no money...
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| 11:12 | <alkisg> Joanet: ok, tests ended :)
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| 11:12 | 1) switch to fat clients
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| 11:13 | 2) You might want to switch to gnome-fallback for stability
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| 11:13 | 3) If after those, clients continue to have issues, install xorg-quantal instead of xorg-precise (ask me for that)
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| 11:13 | (1) will make your clients run MUCH better
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| 11:14 | Most have 1 gb RAM... so it's fine for fats
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| 11:14 | And requires less network bandwidth
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| 11:14 | !fatclients
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| 11:14 | <ltsp`> fatclients: You may find some info about the Ubuntu/LTSP implementation of fat clients at https://help.ubuntu.com/community/UbuntuLTSP/FatClients
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| 11:14 | <alkisg> !ltsp-pnp
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| 11:14 | <ltsp`> ltsp-pnp: ltsp-pnp is an alternative (upstream) method to maintain LTSP installations for thin and fat clients that doesn't involve chroots: https://help.ubuntu.com/community/UbuntuLTSP/ltsp-pnp
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| 11:14 | <Joanet> do you think if I update to gigabit for the server I can get better performance?
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| 11:14 | <alkisg> (the second is much easier)
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| 11:15 | If you upgrade the server and the switch so that there's a gigabit connection between them,
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| 11:15 | then, as fast as ONE client goes now when all others are turned off,
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| 11:15 | with gigabit, ALL your clients will go with the same speed
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| 11:15 | I.e. about 10 times faster than it is now...
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| 11:16 | It's 60 € for a gigabit switch with 1 gigabit port
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| 11:16 | ...and also do switch to fat clients
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| 11:16 | * alkisg closes VNC... | |
| 11:18 | <Joanet> alkisg: and what about intel driver?
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| 11:18 | <alkisg> For the intel driver you can only try (3), but that's for later...
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| 11:19 | <Joanet> network team is looking for a Cisco 10/100 24ports switch with 2 gigabit ports
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| 11:19 | for connecting the server to one of the gig ports
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| 11:19 | <alkisg> That's 10 times more expensive... but if you have money for that, ok
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| 11:19 | Your first task should be to switch to fat clients
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| 11:20 | <Joanet> not buying, recycling
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| 11:20 | <alkisg> Read about ltsp fat clients, and about ltsp-pnp, and decide which way to go
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| 11:20 | <Joanet> fat clients before trying gigabit?
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| 11:20 | <alkisg> Yes
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| 11:20 | You'll get really better performance with them, even on 100 mbps
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| 11:20 | And quite possibly more stability
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| 11:21 | After you do fat clients, _then_ check again for the intel driver issues...
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| 11:21 | <Joanet> ok, i'll try to convert them to fat
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| 11:21 | <alkisg> It's just a matter of generating the appropriate chroot.
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| 11:32 | <Joanet> alkisg: THANKS
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| 11:32 | <alkisg> You're welcome :)
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| 11:33 | <Joanet> i'll let you know as soon as I get fat clients
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| 11:45 | <Hyperbyte> !alkisg
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| 11:45 | <ltsp`> alkisg: The LTSP oracle. Our beacon of hope in the world of LTSP. With the guidance of this divine emperor, we shall prevail.
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| 15:35 | <Burned1> hi! how i can install the flash plugin for thinclient? i installed it on the server using ubuntu software center but clients doesn't use it....
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| 15:36 | where is the mistake?
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