Thanks, interesting info. I don't have to use ssh as all my db servers and my desktop are on a dedicated and firewalled subnet of our LAN. Hence I just run xhost and then xhost + and ignore all those restrictions. But it's good to know where the probs are! -- Cheers Nuno Souto dbvision@xxxxxxxxxxxx On 21/03/2013 12:16 AM, Brian Pardy wrote: > Stick with VNC for installing/upgrading Cloud Control 12c. I ran into > an "interesting" bug (14623310, now patched via auto-update) where > Cygwin's openssh+Xserver, with or without the -Y/-X flags, would > silently timeout the X display support after about 20 minutes causing > an upgrade failure moving from 12cR1 to R2. There's a step in the > upgrade that runs a blind X app with no UI that was failing silently > since it couldn't connect to my $DISPLAY when it was run about 25 > minutes into the upgrade process. I will probably use VNC for all > installs/upgrades for the next decade because of this. -Brian -- > //www.freelists.org/webpage/oracle-l -- //www.freelists.org/webpage/oracle-l