Hello folks,
here is my case: I have installed LTSP5 on a HP Proliant ML110 (Pentium Xenon)
server with Ubuntu 8.10. The clients I am using for testing purposes is an old
Pentium III machine and a less old Pentium M Laptop.
After the usual trouble and uncertainties with respect to boot process, NICs,
multiple DHCP servers and what not, I got it stably booting into a login screen
and from there into a LTSP session.
Now I wanted to start testing how certain software behaves under LTSP. So I
installed three software packs (Stellarium, KStars and Celestia to be precise)
on the server. By mistake I did install them under the true root '/' of the
server as opposed to the "chrooted" '/opt/ltsp/i386' branch. So one would
expect that the thin clients would not "see" these applications, right? (OR am
I completely wrong when it comes to understanding how LTSP is supposed to
work?!)
By miracle, however, the programs are available from the thin clients. And no,
I have neither updated nor re-created the ltsp-image. So basically, I have
nothing but an X-session on the server shared out to the thin clients. That is
not what LTSP is all about (OR is it?!) -- At least I do have got a shared
X-seesion. Though that is not really what I want.
I had noticed before, that when I was logged in as one and the same user on a
thin client as well as on the server at the same time, I was for instance
unable to open Firefox on the client when I had it already running on the
server.
Since miracles more likely are (my?) mistakes, I would like to ask for possible
sources of this peculiar behavior. I am completely at loss (as with so many
things in this new LTSP world)!
One thing I noticed was that, although the PXE-boot process runs fine and gets
me to a remote login prompt on Screen_07, there is some noticeable choking on
Screen_01 during that process. On either of my test machines, the booting runs
through the following stages:
. DHCP and loading PXE-Linux no problem.
. Second DHCP call and finding rootserver's address as well as file
'/ltsp/i386/nbi.img'
. Then something peculiar happens: The screen output reads:
Negotiation: .. size = 177872KB
bs=1024, sz=177872
[ 23.082530] nbd0: Receive control failed (result -32)
Kernel call returned: Broken pipe Reconnecting
Negotiation: .. size = 177872KB
Error: Ioctl/1.1a failed: Bad file descriptor
. After that it goes on with
*Startin system log daemon... [ OK ]
and the same for some similar lines flashing by.
. Finally it gets me to a login prompt and all seems fine. Checking on
Screen_01 the last lines of output (after some sound settings) talk about
W: ltdl-bind-now.c: Failed to find original dlopenloader.
W: main.c: setrlimit(RLIMIT_NICE, (31, 31)) failed: Operation not permitted
W: main.c: setrlimit(RLIMIT_RTPRIO, (9, 9)) failed: Operation not permitted
[OK]
Can you imagine that I find this quite confusing? I have tried everything to
fix the nbd0-error (forced the filename in '/etc/ltsp/dhcpd.conf' to be
'/ltsp/i386/pxelinux.0' to see if it had anything to do with the booting itself
and what not) though nothing whatsoever made any difference. Since I do get to
a LTSP login prompt and I can indeed login to an LTSP session, I judged it no
so big an issue. The only thing that does seem clear is the third to last error
messages which seems related to the fact that I have not DNS/Bind9 configured
yet.
Clearly, I suspect the nbd0-error to be at least related to the peculiar
behavior mentioned above. If anyone could point me to some sort of explanation
or solution, it would render the hours lost fiddling around a well-invested
hands-on experience from where on I could happily go on with my testing. Thank
you very, very much in advance!
Cheers!
Stefan Mueller, Switzerland
= = = = = = = = =
Stefan Müller Wildi
Unterhof 5
CH-6208 Oberkirch
+41 41/920 3336
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