The "Use SSH tunnel" option doesn't work

same problem for me: ubuntu 11.04 beta 2

after fresh install of ubuntu 11.04 (bith 32 and 64 bit) I experience the same problem. ssh tunneling does not work with unison either, whereas ssh works from terminal

I, too, have this issue. I stumbled across a similar bug in a previous release ( https://bugs.launchpad.net/ubuntu/+source/vinagre/+bug/516847 ) that had been resolved. I'm running the release version of 11.04, with Vinagre 2.30.3. After running the command recommended in the previous bug ( nm /usr/bin/vinagre | grep vinagre_ssh_connect ) I get the same "no symbols" message. Dunno if this even applies in the current version, but it's there if it helps any.

A workaround for me was to create manually the ssh tunnel from a terminal : assuming tou can issue a simple ssh to your router with

  ssh <LoginName>@<PublicNameOfRouter>

the tunnel is started with

  ssh -L 9999:<VpnserverAsSeenFromRouter>:5901 <LoginName>@<PublicNameOfRouter>

assuming you've started the vpnserver on screen :1 (for screen :2 use 5902 in place of 5901 and so on)

The tricky thing is then to ask vinagre to connect to localhost:9999 (yes, localhost, not your remote router)... and it works!

NB the ssh tunnel is stopped by disconnecting from the ssh that started it.

The issue was filed upstream at https://bugzilla.gnome.org/show_bug.cgi?id=644432 ; linking the report.

I too can confirm this issue.
I'm running a fresh install of Xubuntu 11.04, vinagre version 2.30.3-1ubuntu2

When trying to connect using the ssh tunnel option I get the "Error reading from unix: Input/output error" message.

SSH tunneling worked fine before, on Ubuntu 10.10, on the same laptop.

I've tracked down the problem. A patch is attached for the Oneiric package. The issue is that ssh enumerates and closes its file descriptors before opening /dev/tty, so the PTY slave is temporarily closed and thus an EIO is delivered to the PTY master in read(). The solution is to keep the slave open in the vinagre process until ssh has opened the terminal. I have also sent the patch to upstream.

(Note that this only addresses the regression where ssh tunneling started failing every time. There is a pre-existing race issue where ssh sometimes receives a SIGHUP after the user enters their password, but it is unrelated and this patch does not address it.)

Thank you for your work Tristan

Ok, I've updated to the current stable version (3.2.1) and include your patch (I've taken the upstream git commit to have the context and description in the patch with the commit number)

Hello TH, or anyone else affected,

Accepted vinagre into oneiric-proposed, the package will build now and be available in a few hours. Please test and give feedback here. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you in advance!

3.2.1-0ubuntu1 works over here.

This bug was fixed in the package vinagre - 3.2.1-0ubuntu1

---------------
vinagre (3.2.1-0ubuntu1) oneiric-proposed; urgency=low

  * New upstream version
  * 03_fix_ssh_tunneling_eio_when_slave_temporarily_closed.patch:
    - updated the patch with the git commit (same code but with context)

  [ Tristan Schmelcher ]
  * Fix EIO in read() on ssh tunneling PTY master due to the slave being
    temporarily closed by ssh. (lp: #764632)
 -- Sebastien Bacher <email address hidden> Thu, 20 Oct 2011 10:58:15 +0200