- Nov 26, 2012
- Gigabyte Z77x-UP5 TH
- GTX 650 Ti
To people like me who could only get DisplayPort working on RX 580, the CSM settings in the BIOS were more tricky than I thought. I always had OS set to "Other OS". Since I bought this thing 7 years or so ago. So I forgot about the fact that the CSM setting disappears when OS is set to "Other OS". You need to change the OS to "Windows 8". (you can leave it here too, it works fine - Windows 8 WHQL is for testing purposes so there's no reason for us to use it.) Then the CSM setting will appear which you then of course disable. I thought there was no CSM setting on this board the whole time.......doh!
After that, then all outputs work (2 DP, 2 HDMI, 1 DVI). I have the Sapphire Pulse RX 580, BTW, (think it's v2). Despite it being natively supported, on one of the Mojave updates, they changed the framebuffer to have 6 outputs so I made a framebuffer patch for our card. Just paste this into your Kernel and Kext Patches in your clover config.plist:
<dict> <key>Comment</key> <string>Sapphire Pulse Radeon RX 580</string> <key>Disabled</key> <false/> <key>Find</key> <data> AAQAAAQDAAAAAQEBAAAAABIEBgEAAAAAAAQAAAQDAAAA AQIBAAAAACIFBAMAAAAAAAgAAAQCAAAAAQMAAAAAABEC AQIAAAAAAAgAAAQCAAAAAQQAAAAAACEDBQQAAAAABAAA AAQAAAAAAQUAAAAAAAAAAwYAAAAAAAQAAAABAAAAAUYB AAAAACABAAAAAAAA </data> <key>InfoPlistPatch</key> <false/> <key>MatchOS</key> <string>10.14.x,10.15.x</string> <key>Name</key> <string>AMD9500Controller</string> <key>Replace</key> <data> AAQAAAQDAAAAAQEBAAAAABIEAQEAAAAAAAQAAAQDAAAA AQIBAAAAACIFAgMAAAAAAAgAAAQCAAAAAQMAAAAAABEC AwIAAAAAAAgAAAQCAAAAAQQAAAAAACEDBAQAAAAABAAA AAQAAAAAAQUAAAAAABAABQYAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAA </data> </dict>
Attached is the original file with the research and stuff. This patch above works for latest Mojave and Catalina, BTW.
So I finally have my machine up and running great. My 30 inch Apple display is connected via DVI to the RX580.
Tried connecting my 24 inch Dell via HDMI cable to DP connector as well as DVI to DP connector. The 2nd display shows up during the whole loading sequence and during log in then intermittently goes black then shows up again then goes black. Going to order a DP to DP cable so there are no adapters. Could it be anything else that is the issue?