client specific problem

[Valerio Pachera]

2012/12/4 Alkis Georgopoulos <alkisg at gmail.com>:
> I haven't yet seen a single case where NBD compression caused problems.
> But I've seen numerous cases where NBD compression made *another*
> problem move obvious, due to the data validation it does.

The first thing I've done was testing the ram memory by memtest and it was ok.
I've been testing the client connecting it directly to the eth0 of the
server, so no possible switch issues;
the behavior is the same of the class room.
I also tried to add a simple rtl8129 network card and boot by
etherboot. No changes.
I tried to change video card or force vesa. No significant changes
I tried another pc with the same motherboard and it behaves the same.
I also updated the bios.

To esclude ndb related problem I reverted to nfs, but no changes there either.
  https://help.ubuntu.com/community/UbuntuLTSP/LTSPWithoutNFS

Here is my lspci
----------
00:00.0 Host bridge: Intel Corporation 82G33/G31/P35/P31 Express DRAM
Controller (rev 10)
00:02.0 VGA compatible controller: Intel Corporation 82G33/G31 Express
Integrated Graphics Controller (rev 10)
00:1b.0 Audio device: Intel Corporation NM10/ICH7 Family High
Definition Audio Controller (rev 01)
00:1c.0 PCI bridge: Intel Corporation NM10/ICH7 Family PCI Express
Port 1 (rev 01)
00:1c.1 PCI bridge: Intel Corporation NM10/ICH7 Family PCI Express
Port 2 (rev 01)
00:1d.0 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI
Controller #1 (rev 01)
00:1d.1 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI
Controller #2 (rev 01)
00:1d.2 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI
Controller #3 (rev 01)
00:1d.3 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI
Controller #4 (rev 01)
00:1d.7 USB controller: Intel Corporation NM10/ICH7 Family USB2 EHCI
Controller (rev 01)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev e1)
00:1f.0 ISA bridge: Intel Corporation 82801GB/GR (ICH7 Family) LPC
Interface Bridge (rev 01)
00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE
Controller (rev 01)
00:1f.2 IDE interface: Intel Corporation NM10/ICH7 Family SATA
Controller [IDE mode] (rev 01)
00:1f.3 SMBus: Intel Corporation NM10/ICH7 Family SMBus Controller (rev 01)
01:00.0 Ethernet controller: Atheros Communications Inc.
AR8121/AR8113/AR8114 Gigabit or Fast Ethernet (rev b0)
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