[FreeNX-kNX] Re: Flickering problem

Tue Feb 15 10:13:45 UTC 2011

Hi,

I talked to the customer who had the problem, he tried the following 
setups, all of them had the flickering problem.

These are the setups that he tried:

client versions:
* 3.4.0-7
* 3.4.0-10
OS versions:
* RHEL6 (My  T400-brick)
* Windows XP SP3 (my dual-boot Netbook as well as my old HP Laptop)
* Win 7 (my set-top box behind my TV)
* Ubuntu 10.04 Lucid Lynx (LTS) (my Netbook)

I tried on one of his computers, and I had the same problem with my own 
account.

On my laptop (Lenovo Thinkpad T400, Freenx client 3.3.0-6) everything 
works fine. The other two test users didn't report any problem, things 
work fine for them.

The server is using:
idesk-0.7.5-7.el5.x86_64
fluxbox-1.0.0-1.el5.x86_64

I tried to change the font, as that is the flickering part of the 
screen. It still flickers even if I change to different font and size.

This is the output from nxserver --list

################
[root at nxtest passerim]# nxserver --list
NX> 100 NXSERVER - Version 3.2.0-74-SVN OS (GPL, using backend: not 
detected)
NX> 127 Sessions list:

Server     Display Username        Remote IP       Session ID
------ ------- --------------- --------------- 
--------------------------------
127.0.0.1       1000    ***        *.*.*.*   
FB24E4B8998D814BF471C234DF064BCF
NX> 999 Bye
################

There has been at maximum 3-4 sessions per time, the server is no 
heavily loaded...

This is what gets logged when that users logs in:

################
HELLO NXSERVER - Version 3.2.0-74-SVN OS (GPL, using backend: not detected)
NX> 105 hello NXCLIENT - Version 3.2.0
NX> 134 Accepted protocol: 3.2.0
NX> 105 SET SHELL_MODE SHELL
NX> 105 SET AUTH_MODE PASSWORD
NX> 105 login
NX> 101 User: ***
NX> 102 Password:
NX> 103 Welcome to: *** user: ***
NX> 105 listsession --user="***" --status="suspended,running" 
--geometry="1680x1050x24+render" --type="unix-gnome"
NX> 127 Sessions list of user '***' for reconnect:
Display Type             Session ID                       Options  Depth 
Screen         Status      Session Name
------- ---------------- -------------------------------- -------- ----- 
-------------- ----------- ------------------------------
NX> 148 Server capacity: not reached for user: ***
NX> 105 startsession  --link="adsl" --backingstore="1" --encryption="1" 
--cache="16M" --images="64M" --shmem="1" --shpix="1" --strict="0" 
--composite="1" --media="0" --session="nxtest" --type="unix-gnome" 
--geometry="1680x999" --client="linux" --keyboard="pc105/fi" 
--screeninfo="1680x999x24+render"
NX> 1000 NXNODE - Version 3.2.0-74-SVN OS (GPL, using backend: not detected)
NX> 700 Session id: ***-1001-F8AEABAD7212C5DECCAF8AFAFCCA7632
NX> 705 Session display: 1001
NX> 703 Session type: unix-gnome
NX> 701 Proxy cookie: 619933189e337c26d91c37cc458cf9e0
NX> 702 Proxy IP: ***
NX> 706 Agent cookie: 619933189e337c26d91c37cc458cf9e0
NX> 704 Session cache: unix-gnome
NX> 707 SSL tunneling: 1
NX> 1009 Session status: starting
NX> 710 Session status: running
NX> 1002 Commit
NX> 1006 Session status: running
NX> 105 bye
Bye
NX> 999 Bye
NX> 1009 Session status: terminating
Info: Closing connection to slave with pid 1742.
1001 Bye.
NX> 1006 Session status: closed
NX> 1001 Bye.
Info: Closing connection to slave with pid 1742.
################

It looks to me like everything is running fine, the source of the 
problem is still obscure :/

Regards,
Marco

On 02/02/2011 03:31 PM, chris at ccburton.com wrote:
> Marco Passerini<marco.passerini at csc.fi>  wrote on 01/02/2011 13:21:20:
>
>> Hi,
> 'lo
>   >  I had to set up a server with FreeNX, for some customers. The system is
>> running Redhat 5 with Fluxbox as Window Manager, iDesk for the icons. NX
>> is installed from the CentOs Extras:
>> nx-3.4.0-6.el5.centos.x86_64
>> freenx-0.7.3-6.el5.centos.x86_64
>> The system works pretty fine, only one customer has some problem with
>> the installation.
> Only one, so there are some other clients who connect without this issue?
>
>> The icons on the desktop are flickering all the time,
>> and this seems to slowdown the connection (possibly band is used where
>> it's not necessary?). On slow connections the system is almost unusable
>> for him. We tried to run the client from his desktop and laptop, with
>> different accounts, and the problem remains; it's not a problem of
>> internet connection either, as he works in the same office as me. If I
> So the problem doesn't follow the user account or the client machine
> or the link !?!?!?!?
>
> It must follow something !!
>
> What about the client OS or the version of the nxclient.
>
>> remember right he is using Ubuntu, might it be an issue client side? Has
>> anyone faced a similar problem?
> Well, you test that with . . . .
>
> If that doesn't pin it down . . .
>
> What about the number of people connected in or the nth person to
> connect etc etc.
>
> What about on Gnome or KDE or something else??
>
>> Thanks in advance,
>> Marco
>> ________________________________________________________________
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>>
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>>
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>>
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