How to Start the VNC Server on Ubuntu

Using a little information from the (now dead) Dave's Tech Blog, you can adjust the port setting by going into gconf-editor.

Under desktop > gnome > remote access there is a key that says alternative_port and is set to 5900. Just change the value to what you need. Then enable the key use_alternative_port.

The other option is if your router/firewall support uPnp you can adjust Vino to make the adjustment in the same section of gconf-editor.

• Reference: How do I use the gconf editor?

The xrandr messages I do not believe are related.

What's happening is that you have two X servers running, one of which is for your VNC server. Chrome doesn't know which to display on -- and it can't display on both like other X apps can. That's a documented bug in the Chromium Open Source project. (See also this duplicate bug report which mirrors your situation.)

What's happening is that Chrome is displaying on your local X server instead of a remote one. Unfortunately, the bug is open in the official Chrome project, which means there isn't an immediate solution that's elegant, but some users on the bug report have managed to get it working by basically making two config directories for Chrome, one for each X server, and running them totally separately. (Search for "--user-data-dir" for a discussion of that on the first bug report.)