Rick suggested trying to switch to VT1 and then back. This didn't work, but this is what I did:
1. Switch laptop screen off (FN+F7) This causes the HP main screen to go haywire
2. Switch to VT1 Use 'ctrl+alt+F1' to get to the terminal
3. Switch back to X Use 'ctrl+alt+f7'. Unfortunately the screen is still messed up and not showing a clear picture.
Rick suggested trying to switch to VT1 and then back. This didn't work, but this is what I did:
1. Switch laptop screen off (FN+F7)
This causes the HP main screen to go haywire
2. Switch to VT1
Use 'ctrl+alt+F1' to get to the terminal
3. Switch back to X
Use 'ctrl+alt+f7'. Unfortunately the screen is still messed up and not showing a clear picture.