So, off the wall question…Is there any way to get the graphics driver from 14.04 installed into 16.04?
My Lenovo Z50-75 would run an external display for extended desktop in 14.04 but won’t even boot in 16.04 with an external display connected. I can’t run 14.04 on this laptop without an external wifi connected because 14.04 wouldn’t run my internal wifi.
If it’s do-able, let me know what info is needed on the graphics adapter and how to pull it from the system.
This is irritating me to no end, I don’t even use the computer unless I’m booting into Windows to update my GPS or automotive scan-tool because of this issue
It would help if you said exactly which driver 
Is this an NVIDIA gpu, AMD, Intel?
What driver were you using? A proprietary one, or an open source one?
Graphics: Card: Advanced Micro Devices [AMD/ATI] Kaveri [Radeon R6 Graphics]
Display Server: X.Org 1.18.3 drivers: ati,radeon (unloaded: fbdev,vesa)
Resolution: [email protected]
GLX Renderer: Gallium 0.4 on AMD KAVERI (DRM 2.43.0, LLVM 3.8.0)
GLX Version: 3.0 Mesa 11.2.0
This issue is solved