Resolution Desktop Problem?

[intel7]

I installed BT. it's good working, no problem. But I'm having trouble Resize.
I've tried "xrandr -s 1024×768" a command.
But i am gives the following error message:
"Size 1024x768 not found in available modes"

How can I solve..

[sickness]

I installed BT. it's good working, no problem. But I'm having trouble Resize.
I've tried "xrandr -s 1024×768" a command.
But i am gives the following error message:
"Size 1024x768 not found in available modes"

How can I solve..

You really should learn how to type things in google:

Screen resolution issues (again) - Linux Forums

Just check your xorg.conf located in /etc/X11/ and see if some