random clients stall out at Error: Ioctl/1.1a failed: Bad file descriptor
Tom Wolfe
twolfe at sawback.com
Tue Dec 9 17:03:26 GMT 2008
OK Guðmundu, thanks for putting me on to that wor-around.At first I was
getting errors though like "NFS over TCP not available from server ip" and
"mount call failed: 13". So with a little research I realised I had to do
a few extra things in addition to the "how-to" you linked to:
1. sudo apt-get install nfs-kernel-server
2. sudo vi /etc/exports
add the following:
/opt/ltsp/i386 192.168.100.1/24(rw,no_root_squash,async)
(change 192.168.100.1 to your own network)
3. sudo /etc/init.d/nfs-kernel-server restart
4. sudo exportfs -a
** For the above steps, these pages kinda helped:
http://ubuntuforums.org/showthread.php?t=249889
http://www.mail-archive.com/ltsp-discuss@lists.sourceforge.net/msg34378.html
** Now the how-to workaround you suggested will work, here it is for
reference:
5. sudo chroot /opt/ltsp/i386
6. Now edit /etc/default/ltsp-client-setup and change the value of the
root_write_method variable to use bind mounts instead of unionfs, it
should look like this afterwards:
root_write_method="bind_mounts"
7. Next, create the file /etc/initramfs-tools/conf.d/ltsp and add the
following line (set the value of the BOOT variable to nfs):
BOOT=nfs
8. Regenerate the initramfs:
update-initramfs -u
9. Hit CTRL-D to exit the chroot now. Make sure LTSP uses the new
initramfs to boot:
sudo ltsp-update-kernels
... all clients now boot, but I have to say I feel quite leary about this
workaround.
Is there somewhere I can report this as a bug?
Can anyone recommend any other solution?
Regards,
Tom Wolfe
---
Tom Wolfe, Technology Coordinator twolfe at sawback.com
Stoney Educational Authority tel: (403) 881-2755
Box 238, Morley AB, T0L 1N0 fax: (403) 881-2793
Morley Community School | Chief Jacob Bearspaw School | Ta-otha School
On Mon, 8 Dec 2008, v-gudmk wrote:
>
I had the same problem some clients worked some didn't. Finally I tried
disabling NBD and enabling NFS as described here:
http://doc.ubuntu.com/edubuntu/edubuntu/handbook/C/customizing-thin-client.html
http://doc.ubuntu.com/edubuntu/edubuntu/handbook/C/customizing-thin-client.html
. I followed the instructions under "However, some people still want to use
NFS. Fortunately, it's easy to switch back to NFS, if it's so desired:".
Now my Dell OptiPlex GX1 client comes up, finally. I realize this is just a
workaround, there's something wrong in the NBD setup but I couldn't figure
it out. I'm using Ubuntu intrepid 8.10.
Regards,
Guðmundur
Tom Wolfe wrote:
>
> Hi again,
>
> I'm now having problems with a few seemingly random clients that do not
> boot up but fail at the following:
>
> on tty8:
> * Starting basic networking
> * Starting kernel event manager
> * Loading hardware drivers
> * Loading kernel modules
> * Loading manual drivers
> * Setting up LTSP Client
> Disconnecting: que, disconnect, sock, done
> [ 27.484772] nbd0: Receive control failed (result -32)
>
> on tty1:
> IP-Config: eth0 hardware address ... etc. etc.
>
> address: 192.168.100.31 broadcast: 192.168.100.255 netmask: 255.255.255.0
> gateway: 192.168.100.254 dns0: 192.168.192.12 dns1: 0.0.0.0
> domain: morleyschool.ed
> rootserver: 192.168.100.254 rootpath: /opt/ltsp/i386
> filename: /ltsp/i386/nbi.img
> Negotiation: ..size = 156428KB
> bs=1024, sz=156428
> Kernel call returned: Broken pipe Reconnecting
> Negotiation: ..size = 156428KB
> Error: Ioctl/1.1a failed: Bad file descriptor
>
> ----
> I get the tty1 error on all machines even ones that succeed in booting up
> (I'm using one of those right now in fact). But the ones that fail stop
> with the message above (tty8). There doesn't seem to be any rhyme or
> reason to which clients fail -- for example, a few Dell Optiplex GX115
> work, a few don't; a few IBM Netvista work, a few don't.
>
> Any advice?
>
> Regards,
> Tom Wolfe
>
> ---
> Tom Wolfe, Technology Coordinator twolfe at sawback.com
> Stoney Educational Authority tel: (403) 881-2755
> Box 238, Morley AB, T0L 1N0 fax: (403) 881-2793
> Morley Community School | Chief Jacob Bearspaw School | Ta-otha School
>
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