[K12OSN] How to make a k12linux client display GDM from a k12ltsp 5.0EL box

"Terrell Prudé Jr." microman at cmosnetworks.com
Thu Aug 13 16:16:29 UTC 2009

Hmm...it sounds like you're describing a video driver issue.  That's 
separate from which LTSP server you're querying for your XDM logins.

What I'd try first is tweaking your lts.conf file to point "SERVER = " 
to your K12LTSP 5.0EL server, but leave everything in your DHCP scope as 
is.  That's perfectly legal to do, and I've done it.  What will happen 
is that your DHCP scope will still tell your clients to point to your 
K12Linux (FC11) server for the stuff in /tftpboot and /opt/ltsp/i386.  
That's where the X11 stuff, including all your drivers, lives.  But 
that's just to get the mini-Linux OS and X11 running on the thin client, 
nothing more.  From that point forward, i. e. once the client has X11 up 
and running, it can do the XDMCP query to *any* XDMCP-speaking X11 
server.  Usually, and by default with LTSP, this is the same box as the 
LTSP server from which you're booting your clients.  But it doesn't have 
to be.

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Burroughs, Henry wrote:
> I've got a funny request.  I need to get my k12linux (FC11) clients 
> displaying via xdmcp a GDM login from my older k12ltsp 5.0EL box 
> (which is now a VM while I build a new k12linux system).  I recycled 
> my oldest thin clients to replace them with low end P4 Dell systems.  
> However, the video does not work properly under k12ltsp but it does 
> under k12linux.  I need to punt for a couple of days using this 
> mixture so teachers can still use their systems but allow me to 
> upgrade the old physical hardware (the temporary/test k12linux is a vm 
> as well).  The syntax systems to have changed for the lts.conf......  
> I've read information saying SCREEN_07 instead of SCREEN_01.  Any help 
> would be appreciated so I can make this switch in the next day.  Thanks!
> Henry Burroughs
> Technology Director
> Hilton Head Preparatory School
> www.hhprep.org
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