Epoptes

epoptes can't extract client information

Asked by Cal

Hi All,

I am setting up a computer lab using Edubuntu 12.04 LTS and epoptes, no LTSP. So far, my clients see and talk to "server" (added to hosts file) However, as soon as I launch epoptes-client on a student machine, the server displays

**addClient's been called for 192.168.1.103:57575
Can't extract client information, won't add this client

I verified the cert checksum in both machines and they match.

Any help regarding this will be greatly appreciated.

Thanks, Cal

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Solved by:
Fotis Tsamis
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Fotis Tsamis (ftsamis) said : 		#1

Hello,

There is probably a problem with the information epoptes-client is sending.
Please execute the following in a terminal at the server side:
sudo sed -i 's/called for", handle/&, r/' /usr/share/pyshared/epoptes/ui/gui.py

Then (re)start epoptes from terminal, boot the student machine and paste here the output you get so we can see what happens.

Best Regards,
Fotis Tsamis

Revision history for this message
Cal (clacruz) said : 		#2

Thanks for your help. I followed your instructions and this is what I got at the server:

havser@server:~$ epoptes
Got clients: 127.0.0.1:55128
---
**addClient's been called for 127.0.0.1:55128 uid=1000
type=standalone
version=0.5.5
user=havser
name=HavSer
home=/home/havser
hostname=server
mac=00:22:68:0A:00:2A
ip=192.168.1.10
cpu=Intel(R) Core(TM)2 Duo CPU T9400 @ 2.53GHz
ram=7881
vga=Mobile 4 Series Chipset Integrated Graphics Controller [2a42]
RV635/M86 [Mobility Radeon HD 3650] [9591]
os=GNU/Linux

Can't extract client information, won't add this client
New connection from 192.168.1.103:38191
---
**addClient's been called for 192.168.1.103:38191 uid=0
type=standalone
version=0.5.5
user=root
name=root
home=/root
hostname=student02
mac=00:22:68:0B:78:76
ip=192.168.1.103
cpu=Intel(R) Core(TM)2 Duo CPU T9400 @ 2.53GHz
ram=3851
vga=Mobile 4 Series Chipset Integrated Graphics Controller [2a42]
RV620/M82 [Mobility Radeon HD 3450/3470] [95c4]
os=GNU/Linux

Can't extract client information, won't add this client
Disconnect from 192.168.1.103:38191
New connection from 192.168.1.103:38192
---
**addClient's been called for 192.168.1.103:38192 uid=0
type=standalone
version=0.5.5
user=root
name=root
home=/root
hostname=student02
mac=00:22:68:0B:78:76
ip=192.168.1.103
cpu=Intel(R) Core(TM)2 Duo CPU T9400 @ 2.53GHz
ram=3851
vga=Mobile 4 Series Chipset Integrated Graphics Controller [2a42]
RV620/M82 [Mobility Radeon HD 3450/3470] [95c4]
os=GNU/Linux

Can't extract client information, won't add this client

Revision history for this message
Best Fotis Tsamis (ftsamis) said : 		#3

This is a known and solved (r324) issue that was found in systems with more than one VGAs. Please add the epoptes stable repository in your sources and upgrade to the latest stable version of epoptes which includes the fix for this bug. To do that execute the following in a terminal:
sudo add-apt-repository ppa:epoptes
sudo apt-get update
sudo apt-get install epoptes

Regards,
Fotis

Revision history for this message
Cal (clacruz) said : 		#4

Thanks Fotis Tsamis, that solved my question.