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


Channel log from 1 March 2015   (all times are UTC)

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15:32
<stevecook>
Hi, steve Cook here. Couple of things to report and some questions....cont....
15:33
Firstly, pnp ltsp is working well. But there is a problem with the lock screen function. If the client is left and goes to lock screen it wont then accept the uiser name to unlock and so has to be restarted.....cont...
15:35
I have hacked round this with something called "caffeine". It is a program thart sits in the system tray and disables the screebn saver on the basis of a given program running. The user can choose hwat programs cause the screensaver to be disabled. In this case, I chose caffeiene itself. Thus, once logged in, a client will never go to screensaver and lock mode....cont....
15:36
It's a bit of a massy hack in that it leaves the system insecure if someone leaves their machine. That being the case, i need to find out how to properly implement the screensaver/lock prperly. any advice gratefully recieved?
15:36
Second issue is to do with blender. It just weont run on the client side. This is not an issue with the power of the client. so, any advice as to how to get it running would be appreciated
15:39
oh, there is a third issue. I have set the printer up as shared on the server side. It is appearing in the printer dialog as available on the clienty side and ostensibly allows it to be chosen when printing. The print just never reaches the quueue though. what am i doing wrong?
16:15
<Hyperbyte>
First things first... the screensaver.
16:15
If you want to disable a screensaver, running another program on top of it that disables it is a bit wierd... you can just remove the startup command, or remove the screensaver alltogether.
16:16
Why the unlocking won't work - LTSP uses SSH to authenticate to the server, that's why it has a custom login manager.
16:17
After the user is authenticated, and the session is started, the user actually can't authenticate again, as the password is stored on the server and not the client. alkisg might know some tricks around this, but AFAIK the only solutions are to install pam ssh_auth module, or to use something like LDAP, so the client can use normal PAM authentication at any time to authenticate clients.
16:24
<stevecook>
The reason I have caffeine installd is due to it's usefulness more generalyl in disabling the screensaver when things like streaming internet video or when vlc etc are running. Thus, i just used this to stop the screensaver as it was already there....cont....
16:26
with rwegards o installing "pam ssh_auth module" or using "LDAP", I am going to need some detailed instruction/guidance I am afraid as i have not got a clue what these things are
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18:17
<stevecook>
hi alkisg. I see you are online now. I wonder if you may be able to help me with an issue I am having with PNP ltsp where the clinets are not coming out of unlock due to not recognising the password?
18:18
<alkisg>
Hello
18:19
vagrantc: do we have any recent version of ltsp-docs somewhere online, where LDM_PASSWORD_HASH is documented?
18:21
stevecook: anyway, check this: http://bazaar.launchpad.net/~ltsp-docwriters/ltsp/ltsp-docs-trunk/view/head:/lts.conf.xml
18:21
Search for LDM_PASSWORD_HASH there
18:21
If you set that to true in lts.conf, you get a workaround
18:21
<stevecook>
will do, I'll let you know how it goes. Thanks.
18:22
<alkisg>
Ah
18:22
stevecook: it's very possible that your ldm isn't recent enough though
18:22
versions: LDM 2.2.14+, LTSP 5.5.2+
18:22
<stevecook>
how chan i check
18:22
<alkisg>
Run sudo ltsp-info
18:22
<stevecook>
will do back in a min
18:24
ldm is 2:2.2.13-1 and ltsp is 5.5.1
18:24
<alkisg>
Right, it won't work there
18:24
<stevecook>
ah right
18:24
<alkisg>
You need a more recent ldm
18:24
About blender, what is your client graphics card?
18:24
lspci -nn -k | grep -A 2 VGA
18:24
<stevecook>
atm 7000 series
18:24
<alkisg>
It's a fat client, right?
18:25
amd?
18:25
<stevecook>
actually, i am not usre if it is a fat client as the instruction on the ubuntu asite made no mention either way. so I am a bot confused on that front
18:25
amd, yes
18:25
<alkisg>
Open a terminal on the client and see the hostname there
18:25
If it says stevecook@ltsp123, it's a fat client
18:26
<stevecook>
will do back in a min
18:26
<alkisg>
stevecook: login to irc from the client itself...
18:26
It'll be faster :)
18:26
<stevecook>
ah yeah, of course......
18:26
actually, i am running a vm clinet ofr ease of testing
18:27
<alkisg>
Then it doesn't have an amd card
18:27
<stevecook>
thouygb, i should add, b;ender does not work on a bare metal client either
18:27
<alkisg>
It has a "virtualbox" card or similar
18:27
That's why it doesn't support 3d
18:27
<vagrantc>
alkisg: no recent version other than bzr
18:27
<alkisg>
The question is, does the bare metal client have 3d capabilities?
18:27
<stevecook>
the bare metal client nearby is an acer laptop
18:27
standard intel stuff inside I would think
18:28
<alkisg>
glxinfo will tell you
18:28
<stevecook>
blender is not working on the laptop client either. but I know the laptop GPR is cable of it
18:28
<alkisg>
Or glxgears, etc etc
18:28
If it has e.g. nvidia, then it needs the proprietary drivers
18:29
That could also be true for some amd cards
18:29
<stevecook>
do i need to install the graphics drivers relevant to the clinet on the server so that the client can then access them when logged in?
18:29
<alkisg>
You should select clients that don't need proprietary drivers :)
18:30
Otherwise, make sure all of them need one driver...
18:30
<stevecook>
Well, the laptop uis ostensibly running ubuntu 14 whebn it is not running as a clinet on ltsp and, when it is running thus, it will load blender. Thuis is without any proprritetry driver
18:31
<alkisg>
No, your conslusion might be wrong because the proprietary drivers get automatically installed
18:31
<stevecook>
ahhh...right
18:31
I thought you always had to install them afte tthe fact via "addittional drivers"
18:32
anyway,, going to check on the client whether or not it is fat, back in a mo
18:34
it says test1@ltsp25:
18:34
<alkisg>
It's fat
18:34
<stevecook>
righto...good
18:35
<alkisg>
And what's the output of lspci -nn -k | grep -A 3 VGA
18:35
?
18:35
<stevecook>
I should saty, that must be the defualt setting from that instructional on the ubuntu site since I diod nothin other than simply follow those instructions to the letter
18:35
2 secs i'll check
18:35
<alkisg>
Yes it's the default for clients with >400 RAM
18:35
With less ram, they default to thins
18:35
<stevecook>
superb, automation...love it
18:38
i'm just going to open this irc in the client, do me a favour and reload the above "lspci -nn -k | grep -A 3 VGA" when i appear as stevecook since i cant find the key for "|". That way i can copy it to the client term
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18:39
<stevecook>
okay I'm in the client. However, i need to check , do i need to be in the bare letal one or will the vm do for this
18:44
i'm goingt o log into the laptop client anyway. back online in a min
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18:51
<stevecook>
right, I'm in the bare metal client
18:51
could you repeat that last command you said i should issue alkisg?
18:52
<alkisg>
stevecook: lspci -nn -k | grep -A 3 VGA
18:52
<stevecook>
thank you, back in a min
18:53
VGA compatible controller [0300]: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07)
18:54
Subsystem: Acer Incorporated [ALI] Device [1025:0176]
18:54
Kernel driver in use: i915
18:54
Display controller [0380]: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a43] (rev 07)
18:54
that's everything
18:55
<alkisg>
And if you start blender from the command line, does it output any errors?
18:55
<stevecook>
will try that and post back in a min
18:56
it gives the following (I will post over a few lines):......
18:56
Color management: using fallback mode for management
18:56
connect failed: No such file or directory
18:56
X Error of failed request: BadRequest (invalid request code or no such operation)
18:56
Major opcode of failed request: 156 (GLX)
18:57
Minor opcode of failed request: 19 (X_GLXQueryServerString)
18:57
Serial number of failed request: 41
18:57
Current serial number in output stream: 41
18:57
that's everything
19:01
GLX....that's got to do with 3D management isn't it?
19:02
<alkisg>
Yes, glx is about 3d
19:02
<stevecook>
i should say, i am using a proprietry amd driver onthe sever, on whoch the ltsp image is presumably based, if that makes any difference
19:03
<alkisg>
Yes, if the client has fglrx installed then it would affect its 3d capabilities
19:03
Uninstall the amd driver on the server side, run ltsp-update-image, reboot client
19:04
You may reinstall it afterwards if you like, but it gets boring after a while... :)
19:04
<stevecook>
will do, will get back wehn done, if you are still about, thanks for the help so far
19:05
rinht singing off for 10 or so mins, back soon
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19:22
<stevecook>
alkisg.....blender is now working on the client side!.........Thanks!
19:24
only two problems left, printer and lockscreen.....but i'm getting there
19:26
my printe ris currently directly connected ot the server, Is this the problem, should it be on one of the clients?
19:29
<alkisg>
stevecook: go to the printer settings and check "allow sharing"
19:29
In fat clients, printer sharing is done normally via cups
19:31
stevecook: *both* of the two first checkboxes there: http://www.rizsilverthorn.net/wp-content/uploads/sites/5/2014/01/Screenshot-180812-191125.png
19:31
Both show and publish...
19:32
<stevecook>
alhi alksig......done the sharing on the server....
19:35
I am using ubuntu mate and there is no "show printer used by other systems" option
19:36
<alkisg>
It should be the default then
19:36
Now, are you seeing the printer on the client side?
19:36
<stevecook>
okay
19:37
i can see the printer on the clinet side, I hasd already done the stuff you mentioned,. If I open a text editor, the printer is there and ostensibly allows me to choose it. The problem is that when i print, nothing happens, it never reaches the queue. but no erros pop up
19:38
<alkisg>
pluma or libreoffice?
19:38
can the server print on that printer?
19:38
<stevecook>
I have tried it with both of them
19:39
the server can print no problem
19:39
<alkisg>
what's the output of lpstat -a on the server and on the client?
19:39
<stevecook>
I will chack and get back, just a min
19:40
on the clinet side: nothing at all
19:40
<alkisg>
Better, lpstat -s
19:40
<stevecook>
okaym, two ticks
19:40
<alkisg>
Also server side
19:41
<stevecook>
on the client side (two lines):.....
19:41
system default destination: LBP2900
19:41
device for LBP2900: ipps://server.local:631/printers/LBP2900
19:41
<alkisg>
Ah
19:41
Did you name your server with the hostname "server"?
19:41
<stevecook>
on the serever side: I did
19:42
<alkisg>
Probably not, so the server isn't accepting the client connection because of wrong hostname
19:42
It's a cups issue
19:42
So, change your server hostname, to "server", and reboot
19:42
You need to modify /etc/hosts and /etc/hostname
19:42
We need to solve that in the ltsp side, for the clients to know the server with its actual hostname...
19:43
<stevecook>
will do, hang on
19:44
which line on the host s file needs to be changed?
19:44
the first line reads "127.0.0.1 localhost"
19:44
<alkisg>
The second?
19:45
<stevecook>
and the second line reads; "127.0.1.1 server"
19:45
<alkisg>
Whoops
19:45
Hrm...
19:45
Wait, ipps? What's that?
19:46
<stevecook>
there is no line with "ipps"
19:46
<alkisg>
Forget the hostname it's ok
19:46
(09:41:17 μμ) stevecook: device for LBP2900: ipps://server.local:631/printers/LBP2900
19:46
How did you add your printer? Did it get automatically installed?
19:46
Is it a usb printer? etc
19:48
<stevecook>
no, it was a right bugger to install. I had to use a special driver setup provided by someone off the internet plus install at least one missing dependancy. I posted a full instructional for other on how to do it here: http://ubuntuforums.org/showthread.php?t=2252431
19:49
yes it is a usb printer
19:49
<alkisg>
That's more difficult then, can't help you over irc for that
19:49
If you had e.g. an hp printer it would be plug and play
19:50
<stevecook>
no worriesw, this printer is the bane of my bleeding life! Do i take it that all other things being equal, what i have already done would in the ordinary runb of things, get the printer up and working?
19:50
<alkisg>
Yes
19:51
Normally you only need to check "printer sharing" in the server, that's all
19:51
<stevecook>
ah right, I am happy to park that problem for the monent then. Only pressing problem remaining is the lck screen issue
19:51
<alkisg>
You need a newer ldm for that
19:52
You might be able to use one of the newer ones there: http://packages.ubuntu.com/search?keywords=ldm
19:52
Or, compile it by yourself ;)
19:53
<stevecook>
okay no probs, will get that updated and come back to irc to see about how to proceed form that point, thanks again for thge help so far alkisg
19:53
I'll not be compiling the bugger.....lol
19:53
at least bot if i can help it
19:57
i have installed on ther sever side. Was easy no problem. will redo the image anbd get back. bye for now
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20:01
<Hyperbyte>
alkisg++
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20:22* alkisg waves to Hypey
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21:37
<stevecook>
Hello folks. Steve Cook here. Just installed latest version of ldm in preparation for fixing the lock screen issue with pnp ltsp clients, as part of help given by alkisg on a numberof issues earlier this evening.....cont
21:37
If anyone know whart i need to do next to fix the liockscreen issue, any advice gratefully recived
21:38
just nipping out of the room for five mins, will leave irc open
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21:48
<stevecook>
ok back
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22:11
<stevecook>
no worries, io will try again tomorrow when hopefulyl alkisg will be availabl;e
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