Win8 and Ubuntu Dual Boot Problems

[Adamos2468]

I was trying to dual boot Ubuntu 13.4(x64 bit) with win 8(x64 bit) on my lap top(it has preistalled with win 8)...
I have disabled the secure boot from win 8 so i can install the Ubuntu 13.4 but when I choose the option install or try i get a purple flashing screen.

Why i have this problem and how i can fix it?

Thank You Very Much!!!

[fantab]

What happens if you wait for a while, like 10mins after the "purple flashing screen"?

What graphics do you have on your laptop?

[Adamos2468]

What happens if you wait for a while, like 10mins after the "purple flashing screen"?

What graphics do you have on your laptop?

Stays the same...

Card name: AMD Radeon HD 7610M
Manufacturer: Advanced Micro Devices, Inc.
Chip type: AMD Radeon Graphics Processor (0x6742)
DAC type: Internal DAC(400MHz)
Display Memory: 2780 MB
Dedicated Memory: 1012 MB
Shared Memory: 1767 MB
Current Mode: 1366 x 768 (32 bit) (60Hz)


Additional info: but when i connected it with a second screen(VGA) it showed perfectly(on the 2nd screen)

[fantab]

If you will post the laptop model and its detailed specs that should give some pointers. Perhaps you should try again, try F6 key as it boots to see if anything changes.
Since it works with VGA screen, its weird; the installation is perhaps not communicating with your laptop screen. Try ubuntu 12.04 and see what happens.