Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.

haralds

macrumors 68030
Original poster
Jan 3, 2014
2,994
1,259
Silicon Valley, CA
I have a Radeon 7970 driving a Dell U3818DW at 3840x1600. Nice curved display that works great using DP1.2.

But no boot menu. Somebody else on this forum suggested forcing Dp1.1. The regular manual had no such option, but after some googling I found the solution.
- Pop the on screen menu
- Go to select the input
- Select DP
- Hold the Check Mark button for 10s.
The first time it will toggle to DP1.1, the second time back to 1.2

Confirmed getting the boot menu!
 

Zeke D

macrumors 65816
Nov 18, 2011
1,024
168
Arizona
good to know, I have a Samsung 4k screen, and I'm not getting the boot screen. I'll try this out.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.