Touch Monitor

Discussion:

Touch Monitor

Todd Hackett

2013-01-12 14:44:52 UTC

Hi All

I haven't been able to find in information about using touch screen
monitors on a thin client with PXE. One of my thin clients I have has a
'built-in' calibration widget and I assume the it will be OkieDokie, but
the others are software controlled by XPe. I guess that I don't know
and need to ask, does the thin client hardware handle this AFTER
the calibration widget has been done? If not, where can I find drivers
for the terminal server for this? I haven't loaded the TS ... yet as it
won't do me any good if the touch screen(s) don't work with it.

Thanks!

todh

--
Todd Hackett Chief Bottle Washer
PoBox 1168
Libby, MT 59923
406.293.3843

Dean Jones

2013-01-14 17:54:30 UTC

Permalink

What model is the touch screen?

They work as long as the kernel knows the USB hardware for the touch panel,
and X can be configured to use the display properly. ELO touchscreens work
without any additional configuration. Some less popular screens need a bit
of tweaking.

I haven't bothered to calibrate the touch screens on thin clients.

If you have any issues, let me know as I have notes about getting some of
the lesser known models working.

Post by Todd Hackett
Hi All
I haven't been able to find in information about using touch screen
monitors on a thin client with PXE. One of my thin clients I have has a
'built-in' calibration widget and I assume the it will be OkieDokie, but
the others are software controlled by XPe. I guess that I don't know and
need to ask, does the thin client hardware handle this AFTER
the calibration widget has been done? If not, where can I find drivers
for the terminal server for this? I haven't loaded the TS ... yet as it
won't do me any good if the touch screen(s) don't work with it.
Thanks!
todh
--
Todd Hackett Chief Bottle Washer
PoBox 1168
Libby, MT 59923
406.293.3843
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Todd Hackett

2013-01-15 01:15:56 UTC

Permalink

HI all

Talked with Dean a bit about this and he suggested that I reload and try
it again. Welp, did that and I have the same issue: thin client boots
and comes up to the login screen, then when I enter logname and passwd,
it waits, the recycles back to the login screen. I have NOT found any
messages in /var/log/secure -or- [chroot] /var/log/secure. In fact,
there are not any message at all about this issue.

Ideas?

todh

Post by Dean Jones
What model is the touch screen?
They work as long as the kernel knows the USB hardware for the touch
panel, and X can be configured to use the display properly. ELO
touchscreens work without any additional configuration. Some less
popular screens need a bit of tweaking.
I haven't bothered to calibrate the touch screens on thin clients.
If you have any issues, let me know as I have notes about getting some
of the lesser known models working.
Hi All
I haven't been able to find in information about using touch
screen monitors on a thin client with PXE. One of my thin clients
I have has a 'built-in' calibration widget and I assume the it
will be OkieDokie, but the others are software controlled by XPe.
I guess that I don't know and need to ask, does the thin client
hardware handle this AFTER
the calibration widget has been done? If not, where can I find
drivers for the terminal server for this? I haven't loaded the TS
... yet as it won't do me any good if the touch screen(s) don't
work with it.
Thanks!
todh
--
Todd Hackett Chief Bottle Washer
PoBox 1168
Libby, MT 59923
406.293.3843
_______________________________________________
K12OSN mailing list
https://www.redhat.com/mailman/listinfo/k12osn
For more info see <http://www.k12os.org>
_______________________________________________
K12OSN mailing list
https://www.redhat.com/mailman/listinfo/k12osn
For more info see<http://www.k12os.org>

--
Todd Hackett System Administrator
POBox 1168
Libby, Montana 59923 406.293.3843

http://www.todhackett.com

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Burke Almquist

2013-01-15 02:51:38 UTC

Permalink

Post by Todd Hackett
HI all
Talked with Dean a bit about this and he suggested that I reload and try it again. Welp, did that and I have the same issue: thin client boots and comes up to the login screen, then when I enter logname and passwd, it waits, the recycles back to the login screen. I have NOT found any messages in /var/log/secure -or- [chroot] /var/log/secure. In fact, there are not any message at all about this issue.
Ideas?

If you go over to the server and try to log in, I assume the user logs in just fine?

Todd Hackett

2013-01-15 12:31:34 UTC

Permalink

Yes. It all works just fine on the server. I am gonna install the
Virt Desktop today and see what that can tell me

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If you go over to the server and try to log in, I assume the user logs in just fine?
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Johan Vermeulen

2013-01-15 13:01:44 UTC

Permalink

Post by Todd Hackett
Yes. It all works just fine on the server. I am gonna install the
Virt Desktop today and see what that can tell me

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Post by Todd Hackett
HI all
Talked with Dean a bit about this and he suggested that I reload and
try it again. Welp, did that and I have the same issue: thin client
boots and comes up to the login screen, then when I enter logname
and passwd, it waits, the recycles back to the login screen. I have
NOT found any messages in /var/log/secure -or- [chroot]
/var/log/secure. In fact, there are not any message at all about
this issue.
Ideas?

hello,

I had a problem some time ago, couldn't log in, no EM, turned out the
issue occured because I changed IP adresses.

Solved in my case with:

#ltsp-update-sshkeys

greetings, J.

Steve

2013-01-15 13:43:03 UTC

Permalink

I had a similliar issue. was able to get to the TC shell console and ssh
to the server. i had to answer yes to accept the server as a known host.
afterward login worked fine.

Post by Johan Vermeulen

Post by Todd Hackett
Yes. It all works just fine on the server. I am gonna install the
Virt Desktop today and see what that can tell me

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Post by Todd Hackett
HI all
Talked with Dean a bit about this and he suggested that I reload and
try it again. Welp, did that and I have the same issue: thin client
boots and comes up to the login screen, then when I enter logname
and passwd, it waits, the recycles back to the login screen. I have
NOT found any messages in /var/log/secure -or- [chroot]
/var/log/secure. In fact, there are not any message at all about
this issue.
Ideas?

hello,
I had a problem some time ago, couldn't log in, no EM, turned out the
issue occured because I changed IP adresses.
#ltsp-update-sshkeys
greetings, J.
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For more info see <http://www.k12os.org>

2013-01-15 14:30:15 UTC

Permalink

Hi All

Instead of using the 'login window' I [ctl][alt] to F3 and got to a bash prompt on the
thin client. This did NOT show the normal login and dumped me into the filesystem "/".
'whoami' says I am root. I have trouble with this as it is a BIG security problem.
Sure, I can fix that by not setting SCREEN_?? in the lts.conf, but what if I forget? I
guess that it would only affect the filesystem on the client, but ssh IS available (
yes, have a good password AND not on the usual port ) so some nefarious no gooder could
possibly bang at the server. Oh, and yes I could ssh to the server and login; didn't ask
me the usual 'accept' question though.

Next, there are no errors in Xorg.1.log but boot.log was another matter:
Mounting local filesystems: FAILED
Starting NFS statd: FAILED
Setting NIS domain: not found FAILED

the local filesystem failure is probably moot, but I don't know about the other two.

bash-4.1# [startx] dies - module mach64 not found - so ima gonna go and figure out where
that is!

It will work ....someday.... sigh!

Post by Steve
I had a similliar issue. was able to get to the TC shell console and ssh
to the server. i had to answer yes to accept the server as a known host.
afterward login worked fine.

--
Todd Hackett Chief Bottle Washer
PoBox 1168
Libby, MT 59923
406.293.3843

Burke Almquist

2013-01-16 00:34:16 UTC

Permalink

Post by Todd Hackett
Hi All
Instead of using the 'login window' I [ctl][alt] to F3 and got to a bash prompt on the
thin client. This did NOT show the normal login and dumped me into the filesystem "/".
'whoami' says I am root. I have trouble with this as it is a BIG security problem.
Sure, I can fix that by not setting SCREEN_?? in the lts.conf, but what if I forget? I
guess that it would only affect the filesystem on the client, but ssh IS available (
yes, have a good password AND not on the usual port ) so some nefarious no gooder could
possibly bang at the server. Oh, and yes I could ssh to the server and login; didn't ask
me the usual 'accept' question though.

It's not ideal, but OTOH if the students have physical access to the network (a room with a network jack in it), then they certainly could do far worse things, like booting the client from a usb stick with their own malicious tools or sneaking a laptop onto the network. If you are practicing defense in depth, then you assume that even internal users might behave maliciously and set your security accordingly.

As for ssh
http://www.la-samhna.de/library/brutessh.html
http://forums.contribs.org/index.php?topic=40632.5;wap2
I've found these suggestions helpful.

Post by Todd Hackett
Mounting local filesystems: FAILED
Starting NFS statd: FAILED
Setting NIS domain: not found FAILED
the local filesystem failure is probably moot, but I don't know about the other two.
bash-4.1# [startx] dies - module mach64 not found - so ima gonna go and figure out where
that is!

This makes me wonder EL6 has drivers for your video. How old is the video chipset on those clients?
Have you tried setting up a chroot using a FC11?

Post by Todd Hackett
It will work ....someday.... sigh!

Brian Fristensky

2013-01-15 15:47:24 UTC

Permalink

I missed your first post, but I am assuming that what happens is that
you get the login prompt on the TC, type in your userid and password,
and get kicked back to the login prompt.

I should preface this by saying that this was the solution with LTSP 5.2.4.5.
I am currently using 5.2.17-el6, which I installed over a year ago, and I
don't remember if it also had this problem. With LTSP, once I get it to
work, I try very hard not to monkey with it!

This was the problem:

1. ltsp fails to read /var/lib/tftpboot/ltsp/i386/lts.conf from the host when
the thin client
boots. The only way to fix this problem is to copy the lts.conf file to
/opt/ltsp/i386/etc/lts.conf on the host. If you are using NBD, each time this
file is changed, you need to rerun ltsp-update-image.

2. The reason this is a problem is that the ldm client on the TC seems to
be missing important environment variables. At the very least, we need to
include in lts.conf a line reading

LDM_XSESSION=gnome-session

or whatever your desired session is.

--
Brian Fristensky