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.) ** Patch added: "vinagre-fix-ssh-tunneling-eio-when-slave-temporarily-closed.debdiff" https://bugs.launchpad.net/ubuntu/+source/vinagre/+bug/764632/+attachment/2548920/+files/vinagre-fix-ssh-tunneling-eio-when-slave-temporarily-closed.debdiff -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to vinagre in Ubuntu. https://bugs.launchpad.net/bugs/764632 Title: The "Use SSH tunnel" option doesn't work Status in Vinagre: VNC client for GNOME: Confirmed Status in “vinagre” package in Ubuntu: Triaged Bug description: Binary package hint: vinagre I get this message: Error creating the SSH tunnel Error reading from Unix: Input/output error I've had this problem in the past but it usually worked if I simply retried the connection. Now it happens every time and it won't establish the ssh tunnel. If I connect to the tunnel host with ssh from the command line that works fine, also if I create the tunnel with: $ ssh -L5999:h1:5901 [email protected] it also works fine when I then connect to localhost:5999 in vinagre. ProblemType: Bug DistroRelease: Ubuntu 11.04 Package: vinagre 2.30.3-1ubuntu2 ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2 Uname: Linux 2.6.38-8-generic i686 Architecture: i386 Date: Mon Apr 18 14:33:11 2011 ExecutablePath: /usr/bin/vinagre InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100427.1) ProcEnviron: LANGUAGE=en_GB:en PATH=(custom, user) LANG=en_GB.UTF-8 SHELL=/bin/bash SourcePackage: vinagre UpgradeStatus: Upgraded to natty on 2011-04-18 (0 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/vinagre/+bug/764632/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
