Hi there,

We have a bunch of Fujitsu-Siemens Futro A255 thin clients[1] which wont
play nicely with our LTSP-5 system. We sent a problem report to
Fujitsu-Siemens and got the expected answer - they wont help us because
we're not running eLUX NG or Windows CE.net operating system... Hopefully
someone here can help us.

Here's the <problem_report>:

We are running an LTSP-5 system on Debian 5.0 (Lenny) using KDE as the
window manager. Only notable change we have made to the default setup
provided by Debian is that we are using XDMCP instead of SSH.

Problem with our Futro A255 thin clients is that they start to freeze
randomly one by one when they are under use. By freezing I mean that the
client becomes totally unresponsive and the display freezes.

Sometimes the first freezing occurs within minutes after log in and
sometimes it takes ~10 minutes or so. Some of them might last for an hour
or two but usually eventually they all end up dead. In the meanwhile
there are four clients that are built from spare parts that have been
running smoothly for 27 days now.

Sometimes a client writes an occasional "nfs: server <our_server_ip> not
responding, still trying" appears to syslog moments before and sometimes
- very rarely though - a few minutes after the client freezes. Sometimes
there is also a "NETDEV WATCHDOG: eth0: transmit timed out" message which
might or might not be related to the problem.

We have been doing a lot of testing and we think that the ethernet driver
(r8169) might be the culprit. We have tried to use different kernel
versions (2.6.26-1-486 and 2.6.26-2-486 provided by Debian and 2.6.29.4
from kernel.org) with the in-kernel driver and the driver from
Fujitsu-Siemens website. Other tests we've done include but are not
limited to disabling ACPI, APM and apic, upgrading X.org display drivers,
using different swithes between the server and the clients, etc...

</problem_report>

The provided eLux NG operating system runs on Linux kernel 2.4.32 and
uses r1000 -module as the ethernet driver. Source for r1000 can be
downloaded from the Fujitsu-Siemens website and AFAIK it has been merged
with the r8169 driver which comes with the stock kernel. Anyway the r1000
doesn't work with a 2.6 kernel.

We propably wont have the chance to do any more tests with the clients
before July, but any ideas that we could try then are welcome.

1. http://ts.fujitsu.com/products/deskbound/thin_clients/futro_a.html


Regards,

Eero Lemmelä

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