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jam | 1 Apr 2008 02:49
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Re: advice on ltsp please


On Mon, 2008-03-31 at 12:10 -0700,
ltsp-discuss-request@... wrote:
> 
> James, that was my first attempt, and couldn't get autologin to work
> in the
> first place. From what I have read in many other posts I'm not alone
> there.
> Everybody points to ldm as the source of the problem, and I even tried
> a ldm
> replacement (don't remember where I got it, had read so many docs
> before
> asking for help here) but couldn't get it to work either. Any help
> here?
> 
> Just to make things easier for me (I'm trying to educate myself about
> ltsp)
> I installed a fresh copy of ubuntu-7.10-server for the sake of having
> no
> gnome nor wm to worry about, then installed ltsp5. Then created
> a .xsession
> file with a call to xcalc as a test and, after logging in the client
> complied about not having desktop manager/window manager. Then
> installed
> blackbox wm and the test succeeded, but now even if .xsession file
> does not
> exist because somehow blackbox is automatically launched. For now, its
> ok to
> have a wm, what bothers me is not knowing why things happens. I'm not
> worried at this time about performance/refinements just want the whole
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Sudev Barar | 1 Apr 2008 06:47
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Re: advice on ltsp please

On 28/03/2008, Jorge Trujillo <jorgetrujillo22@...> wrote:
[SNIP]
> worried at this time about performance/refinements just want the whole thing
> to work.
>
> Please be patient with me, I'm working hard trying to acquire all the
> required knowledge while doing this project and of course having fun!.
>
>
> > > > Now I came with this project: I want to build a "remote graphics
>  > > display
>  > > > device" that will allow me to connect it into my local net and show
>  > > > dynamically generated png (or whatever) image files from a central
>  > > server to
>  > > > this "special thin-clients". The purpose is to create a network of
>  > > > information screens that can be spread across a building.
>  > > >

Did you try the gdm.conf route?

If you change the following lines of gdm.conf I think you can get your solution:

# Program to run to draw the background in the standard greeter.  Perhaps
# something like an xscreensaver hack or some such.
# BackgroundProgram=
# If this is true then the background program is run always, otherwise it is
# only run when the BackgroundType is 0 (None).
# RunBackgroundProgramAlways=false
# Delay before starting background program
# BackgroundProgramInitialDelay=30
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Chris Roberts | 1 Apr 2008 09:49
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Re: LTSP 4.2 Local Devices

On Wednesday 26 Mar 2008, William Cody wrote:
> Thanks for your help.  What syslog were you talking about tailing when you
> plug and unplug the usb or other devices into the computer?

Just the standard syslog on the server - in Debian it would be 
in /var/log/syslog; so assuming you're logged into LTSP yourself, just open a 
command line on your desktop and tail -f /var/log/syslog.

Re. my earlier posting, do take copies of any files before you edit them.

Chris.

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Zava | 1 Apr 2008 09:53
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memory, swap, diskless

Hi, I didn't understand how ltsp memory subsystem exactly works:

My system is up and running, but thee's something not clear.

At the moment I am testing ltsp with a diskless client.

All is ok.

When I login from the client, I see all the memory of the ltsp server, 
is it normal?

I ask this because I was confused about swapping read in various docs in 
the net:

In few words, there's written if I have a client with < 32 mb ram I 
should use swap files.
I don't understand this because, as I have written, when I use the 
client I see all the ram of the ltsp server, and not the client "local" ram.
More over, that sentence (" if you have a client with < 32 mb ram you 
should use swap files".) means that I use the ram of the client, and 
it's in contrast with what i see. (all the ram of the ltsp server)

I hope you can help.

Thanks in advance.

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Chris Roberts | 1 Apr 2008 09:54
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Re: Disable floppy drives after loading

On Friday 28 Mar 2008, Plácido Sousa wrote:
> I've just installed LTSP using UBUNTU 8.04 (Hardy Heron)
> It worked fine.
>
> I use floppy disks to boot (PXE - rom-o-matic) but I don't want to use them
> for local storage (Only USB pendrives)
> Does anyone know how to disable access to floppy drives???
>
> I did it once editing a file in /opt/ltsp/i386/etc/udev /rules.d/
> and I try that again with no success.
>
> (the clients are always trying to access them and it's annoying)

I think the following should work regardless of LTSP version (comments 
anyone?):

http://wiki.ltsp.org/twiki/bin/view/Ltsp/LTSP-42-LocalDev#Disabling_local_device_access_fo

I don't think it should prevent the first boot, as that it prior to the kernel 
being installed on the client.

Chris.

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Chris Roberts | 1 Apr 2008 10:04
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Re: memory, swap, diskless

On Tuesday 01 Apr 2008, Zava wrote:
> When I login from the client, I see all the memory of the ltsp server,
> is it normal?

Yes, because you are logged into the LTSP server, it is natural that that is 
the memory you are interrogating.

> In few words, there's written if I have a client with < 32 mb ram I
> should use swap files.

Do you have less than 32mb RAM, I think you'd be talking about 20-year-old 
kit!  I really don't think that this is a worry, unless you really do have 
exceptionally old equipment.

Chris.

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Frank Cox | 1 Apr 2008 10:11
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Re: memory, swap, diskless

On Tue, 01 Apr 2008 09:53:27 +0200
Zava <zava.zava@...> wrote:

> In few words, there's written if I have a client with < 32 mb ram I 
> should use swap files.

I have several Neoware Capio 600-series terminals that are in regular use.
They have 32mb of ram and work perfectly with a 64mb swapfile.  If the swapfile
is disabled, they tend to lock up after a short period of time.

--

-- 
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Zava | 1 Apr 2008 10:25
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Re: memory, swap, diskless

Frank Cox ha scritto:
> On Tue, 01 Apr 2008 09:53:27 +0200
> Zava <zava.zava@...> wrote:
>
>   
>> In few words, there's written if I have a client with < 32 mb ram I 
>> should use swap files.
>>     
>
> I have several Neoware Capio 600-series terminals that are in regular use.
> They have 32mb of ram and work perfectly with a 64mb swapfile.  If the swapfile
> is disabled, they tend to lock up after a short period of time.
>
>   
Thanks for replying.

But so this means i use the ram of the thin client too?
If yes, is the ram of the thin client used only for booting or also for 
other?
What about the fact that when i use the client and if i write "free" or 
I use "top" commands i see the ram and the swap of the server and not 
the one of the client?

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Sudev Barar | 1 Apr 2008 10:45
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Re: memory, swap, diskless

On 01/04/2008, Zava <zava.zava@...> wrote:
>  > I have several Neoware Capio 600-series terminals that are in regular use.
>  > They have 32mb of ram and work perfectly with a 64mb swapfile.  If the swapfile
>  > is disabled, they tend to lock up after a short period of time.
>  >
>  >
>  Thanks for replying.
>
>  But so this means i use the ram of the thin client too?
>  If yes, is the ram of the thin client used only for booting or also for
>  other?

Yep the client RAM is used for managing local display and I/O from
keyboard mouse etc. So if too many things are running at the same time
it is better to have some swap space enabled.

>  What about the fact that when i use the client and if i write "free" or
>  I use "top" commands i see the ram and the swap of the server and not
>  the one of the client?

Since all commands you give are actually running on server that is the
output you will (and are getting) get.

--

-- 
Regards,
Sudev Barar

Read http://blog.sudev.in for topics ranging from here to there.

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Frank Cox | 1 Apr 2008 10:45
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Re: memory, swap, diskless

On Tue, 01 Apr 2008 10:25:12 +0200
Zava <zava.zava@...> wrote:

> But so this means i use the ram of the thin client too?

You can look at the thin client as being a "smart display" for the LTSP
server.

> If yes, is the ram of the thin client used only for booting or also for 
> other?

It's a "smart display".  The "smart display" uses the ram on your thin client
to show you the desktop.

> What about the fact that when i use the client and if i write "free" or 
> I use "top" commands i see the ram and the swap of the server and not 
> the one of the client?

You are logged into the server.  Every program that you run (including "free"
and "top") run on the server, so the output that you see is what you would get
if you ran the program on the server directly.

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-- 
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