I have installed Ubuntu 12.04 on my new Dell Vostro 3550 and noticed persistent windows and cursor blinking. When going to console (ctrl+alt+f1) and using 'cat' I see persistent generation of this symbols: '^@'.
UPD: I get rid of blinking by disabling "Video Bus" (id=8) device under Virtual core keyboard section from
sudo xinput set-prop 8 "Device Enabled" 0
But after return from console (ctrl+alt+f1 then ctrl+alt+f7) interface is blinking again.
I wonder what this device is? And how I can disable it forever or maybe some drivers needed?