IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 14 May 2011 (all times are UTC)
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| 04:05 | <Henning> muppis, several weeks back you tried to help me figure out what prevented me from connecting a USB printer to a LTSP client
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| 04:05 | Unfortunately you had to give up because your virtual test env was not avail. that day
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| 04:05 | maybe time to give it another try?
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| 04:08 | <muppis> Henning, well.. I can't access *that* test env right now, but I'm fixing my home one now, so I can give a try.
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| 04:09 | <Henning> the last time you recommended to check whether there was anything listening on port 9100 - there isn't
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| 04:09 | thanks
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| 04:09 | is it of any importance that my env (besides the client of course) is a VM too?
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| 04:11 | <muppis> I think that little piece of software need that actual printer to keep running. Had that same problem with my customer and it was permission problems in lts.conf at server side.
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| 04:12 | Somehow oddly those has changed so tfpd couldn't read the file and thus client didn't load it.
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| 04:12 | <Henning> in that case none of the directives defined there should be pulled right?
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| 04:12 | <muppis> Yes.
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| 04:12 | <Henning> that's not the case as language settings and so on are applied to the client
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| 04:13 | <muppis> So, if you have root access at the client where printer is attached, you can try run application named jetpipe.
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| 04:13 | <Henning> permissions are: -rw-r--r-- 1 root root 560 2011-03-14 12:00 /var/lib/tftpboot/ltsp/i386/lts.conf
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| 04:13 | <muppis> Looks good.
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| 04:14 | <Henning> open a root shell on the ltsp client box? And issue what command to start jetpipe? Is it a service?
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| 04:15 | <muppis> Yes x3
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| 04:17 | Syntax is: jetpipe /dev/lp0 9100
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| 04:18 | <Henning> Thx :-)
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| 04:18 | <muppis> Probably /dev/usblp0 or /dev/usb/lp0 works better.. ;)
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| 04:19 | You can then check with netstat -tanp | grep 9100 if it works. jetpipe is python script, so port is listened by python.
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| 04:20 | <Henning> All right puzzled now. Executing what you recommended leads to: "The programm jetpipe is currently not installed... You can install it by.... apt-get install ltp-client-core
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| 04:20 | So I assume I do have to install that on the lstp server machine, right?
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| 04:21 | <muppis> No.
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| 04:21 | You should have it in client, not in server.
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| 04:21 | <Henning> So this needs to be installed in the client's chroot?
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| 04:22 | <muppis> Yes, but I think you can't have running client without it already installed. :)
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| 04:23 | <Henning> that's strange then because the client is up and running right now
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| 04:24 | <muppis> Go to chroot and run: which jetpipe
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| 04:24 | If it gives /usr/sbin/jetpipe, you're good to go.
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| 04:26 | If you haven't done this, put screen_02=shell to lts.conf, so you get root shell at client easily. It can be found with ctrl+alt+F2 after reboot.
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| 04:26 | <Henning> In chroot, command which jetpipe gives /usr/sbin/jetpipe - but then the message about ltsp-client-core message missing is wrong, isn't it?
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| 04:27 | <muppis> It depends. If it gives that error at server, not in chroot, then it's right. If it gives in chroot, try: dpkg -S /usr/sbin/jetpipe
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| 04:28 | It should give this: ltsp-client-core: /usr/sbin/jetpipe
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| 04:31 | <Henning> Ok, rebooted the client with screen_02=shell, which drops me right into that shell with root permissions, No GUI anymore, Guess I have to add SCREEN_07=ldm in addition to the shell
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| 04:32 | <muppis> Yes. Sorry, forgot to mention that.
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| 04:34 | <Henning> No big thing, Running the jetpipe command succeeded, Just opened syslog, attached the printer and guess what - lots of output and add the end "USB Bidirectional printer...."
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| 04:35 | Looks good
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| 04:35 | Give me a sec to reboot the client with shell, and GUI
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| 04:38 | <muppis> If you can get jetpipe running and working manually, then problem is in lts.conf or getting settings from it. Try getltscfg -a at client and see does it give same values as defined in lts.conf.
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| 04:41 | <Henning> The funny thing after the reboot: Jetpipe's listening directly after the reboot without doing anything. The only thing I did never try beforehand was connecting the printer while booting
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| 04:41 | I always connected the printer once the lstp client was up to see exactly what's going on by monitoring the syslog
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| 04:41 | <muppis> :D
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| 04:42 | <Henning> So I guess the only thing learned from that is to connect printer while booting, hmm? :-)
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| 04:42 | <muppis> lts.conf is read and processed during startup, so if /dev/usblp0 doesn't found at that time, jetpipe fails to start.
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| 04:44 | <Henning> Now "the only" thing is to get the printer to work which has always been some trouble on a standalone hardware machine....
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| 04:45 | Do you by any chance know whether it is possible to use the scanner function of a multi functional device connected to an ltsp client or do I not even have to bother trying?
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| 04:45 | any experience with that?
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| 04:46 | <muppis> Not yet.
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| 04:47 | <Henning> Hmm, do I remember it right that I have to add the device as HP Jet direct now?
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| 04:49 | <muppis> Yes, and with client's IP.
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| 04:49 | You should make it fixed in dhcpd.conf to avoid futher problems.
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| 04:52 | <Henning> Ok, will do so. Thanks,
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| 04:52 | One more question about the driver to use
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| 04:53 | Do you use a generic HP driver for your printers?
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| 04:54 | Asking because the printer is connected now via HP JetPipe but the printer actually is a Samsung printer....
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| 04:55 | <muppis> I use model specific if possible to ensure proper functioning.
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| 04:55 | Even the script is called as jetpipe, it is just redirecter for CUPS and uses same port as actual JetPipe.
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| 04:56 | <Henning> Ok - thanks for the info! Guess I felt lucky to soon?
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| 04:57 | <muppis> You never know.
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| 04:57 | <Henning> Even though the printer driver was listed (SCX-4200) printing a test page does not work...
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| 04:58 | Device URI is listed as socket://<IP-ADDRESS>:9100
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| 04:58 | <muppis> That's fine.
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| 04:58 | <Henning> Any other idea for further trouble shooting?
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| 04:59 | <muppis> Can CUPS obtain any status information from printer?
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| 05:00 | <Henning> Well, on the first tab of the printer settings it says: "Printer state: Idle - Ready to print"
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| 05:00 | <muppis> How about Ink/Toner Levels -tab?
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| 05:01 | <Henning> Just states "There are no status messages for this printer"
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| 05:01 | <muppis> Hit Refresh.
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| 05:01 | <Henning> Greyed out
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| 05:02 | <muppis> Ok.
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| 05:02 | <Henning> Turning off printer, Rebooting client - Always those desperate last tries :)
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| 05:02 | <muppis> :D
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| 05:08 | <Henning> Grrr - no luck
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| 05:08 | When I print the test page the message "Idle - ready to print" changes to "Processing page" and the back to the idle message but the darn printer just sits there doing nothing....
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| 05:09 | any more trouble shooting ideas?
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| 05:10 | <muppis> RUn first in terminal: watch "netstat -tanp | grep :9100" and then try printing.
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| 05:11 | There you see is it even trying to connect to client.
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| 05:12 | <Henning> Changes from listen to established and then back to listen....
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| 05:14 | <muppis> At client side?
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| 05:15 | <Henning> yes
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| 05:16 | did this on the terminal activated earlier on....
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| 05:16 | <muppis> Ok. Trying to figure what next.
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| 05:17 | Is possible to try does that printer work at all?
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| 05:18 | <Henning> The printer works fine using a local install of Ubuntu on the same machine used as ltsp client right now
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| 05:18 | <muppis> Ok.
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| 05:18 | <Henning> It's only a total bitch to set up
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| 05:19 | <Henning> When you google for Samsung scx-4200 "Ubuntu" you find quite a bunch of people having issues getting the printer to work
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| 05:19 | Guess from now on - as the printer is connected - it's time to work through all those posts.... :-(
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| 05:20 | Anyhow - Thanks a lot for you patience and help - Got a big step further ahead!
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| 05:23 | <muppis> I was suggesting to do so.
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| 05:23 | No problem at all.
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| 05:23 | <Henning> All right then, Thanks to everyone of the LTSP team to create and maintain this really great piece of software!
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| 05:24 | Have a good weekend folks!
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| 05:24 | <muppis> Same to you.
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| 08:00 | <midasxl42> Hello, i'm using LTSP in edubuntu 10.4 and when i start up the thin station it connects but i get no login screen. all i get it a white screen and a mouse pointer.I get a ltsp 20 with the clients ip address but nothing else.. can anyone help me with this.. Thanks
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| 00:00 | --- Sun May 15 2011 | |