pastrychef
Moderator
- Joined
- May 29, 2013
- Messages
- 19,458
- Motherboard
- Mac Studio - Mac13,1
- CPU
- M1 Max
- Graphics
- 32 Core
- Mac
- Classic Mac
- Mobile Phone
Hi,
I have an odd problem regarding the monitor output. I have two graphic cards as described in the signature. The AMD card is in slot #1 and connected to the monitor via HDMI, and the nVidia card is in slot #2 and connected to the monitor via DP. I have disabled the nVidia card from config.plist using devices properties. Things work well for both macOS and Windows.
But whenever the monitor go to sleep or being turned off in macOS (just the monitor, not the whole system), I can't get it to turn back on. HDMI has no output. I have to shuffle the monitor cable (switch DP cable from the nVidia card to AMD card) to get some sort of monitor output.
Any idea what I have done wrong here? It seems like a trivial problem.
I've never had much luck with HDMI on macOS. It often wakes to black screen or flickers in the middle of normal use. The same HDMI cable on the same computer with same video card works fine in Windows. In some instances, lowering resolution and/or refresh rate helps.
If possible, use DisplayPort instead of HDMI.