Computer Model: Dell think14-5447 laptop
Graphics card configuration: integrated graphics card Intel Core graphics card, CPU is a i5-4210U; independent graphics card ati_radeon_r7_m265
There are many online posts on ATI/Intel dual graphics cards. At first I installed ubuntu12.04 (64-bit ).
In version 12.04, use the lshw-C video command to view the video card information. Both the set display and the dedicated display have no driver. In this case, the fglrx closed source driver fails to be installed according to the online method. After being replaced with ubuntu14.04 (64-bit, you have successfully installed the fglrx driver on the Internet. I don't know if it is necessary to have an explicit set driver. If you have any experts, you can give me some advice :)
Ubuntu14.04 (64-bit) Installation of ati_radeon_r7_m265 video card driver steps, children's shoes can refer to here.
Ubuntu14.04 (64-bit) install the ati_radeon_r7_m265 graphics card driver