client specific problem

[Valerio Pachera]

I'm going to write how I understood the issue was about nbd:

I didn't get any usefull message in /var/log/syslog of the server.
ctrl+alt+F1 or F2 etc was giving not always showing the shell, and the
access was anyway forbidden.

So i enabled root login and ssh access for the client:
  ltsp-chroot
  passwd
    <new root password>
  apt-get install ssh
  exit
  ltsp-update-image

That way, I was able to login to a console by pressing ctrl-alt-f1
(when possible), or by ssh directly into the client
  ssh root at 192.168.0.24
(the ip of the client can be retrieved in /var/log/syslog of the server).
Sometime, it was completly frozen, so no ssh nor ping was working,
only a hard reboot.

Once logged into the client, dmesg was showing lot's of squashfs errors
----------------
[    7.052456] input: HDA Intel Line as
/devices/pci0000:00/0000:00:1b.0/sound/card0/input3
[    7.052609] input: HDA Intel Front Mic as
/devices/pci0000:00/0000:00:1b.0/sound/card0/input4
[    7.053432] input: HDA Intel Rear Mic as
/devices/pci0000:00/0000:00:1b.0/sound/card0/input5
[    7.053660] input: HDA Intel Front Headphone as
/devices/pci0000:00/0000:00:1b.0/sound/card0/input6
[    7.053823] input: HDA Intel Line-Out as
/devices/pci0000:00/0000:00:1b.0/sound/card0/input7
[    7.276180] input: ImExPS/2 Generic Explorer Mouse as
/devices/platform/i8042/serio1/input/input8
[    7.586759] SQUASHFS error: zlib_inflate error, data probably corrupt
[    7.586764] SQUASHFS error: squashfs_read_data failed to read block 0x97197b0
[    7.586766] SQUASHFS error: Unable to read data cache entry [97197b0]
[    7.586768] SQUASHFS error: Unable to read page, block 97197b0, size ce43
[    7.586771] SQUASHFS error: Unable to read data cache entry [97197b0]
[    7.586773] SQUASHFS error: Unable to read page, block 97197b0, size ce43
[    7.586776] SQUASHFS error: Unable to read data cache entry [97197b0]
[    7.586777] SQUASHFS error: Unable to read page, block 97197b0, size ce43
[    7.586780] SQUASHFS error: Unable to read data cache entry [97197b0]
[    7.586782] SQUASHFS error: Unable to read page, block 97197b0, size ce43
[    7.586785] SQUASHFS error: Unable to read data cache entry [97197b0]
[    7.586787] SQUASHFS error: Unable to read page, block 97197b0, size ce43
[    7.600896] SQUASHFS error: zlib_inflate error, data probably corrupt
[    7.600901] SQUASHFS error: squashfs_read_data failed to read block 0x97197b0
[    7.600903] SQUASHFS error: Unable to read data cache entry [97197b0]
[    7.600905] SQUASHFS error: Unable to read page, block 97197b0, size ce43
[    7.895318]  nbd9: unknown partition table
[    7.896757] block nbd9: NBD_DISCONNECT
[    7.897214] block nbd9: Receive control failed (result -32)
[    7.897227] block nbd9: queue cleared
[   16.576031] eth0: no IPv6 routers present
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