I finally gave in to the update prompt and did it. Now my 2019 Mac Pro boots but there is no video. I can log into it from another computer and see that everything looks normal including Finder running. Killing Finder had not affect. Resetting the SMC had no effect. Since it was fine before the update, if feels like a software issue. I don't see how I can run restore without video. Any ideas how to fix this? I could make a bootable usb on a 16,1 iMac but I don't know if that would be useful.
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MP 7,1 No video after update of Monterey
- Thread starter critter43
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Did you try completely disconnect the monitor (both from the computer and form the power source), then re-connect it again?
This may force the7,1 to re-detect the monitor, and communicate with it again.
There is a known weird behavior of AMD Cards with MacPro7,1 SMBIOS when using the Verbose Option while Booting leading to a blank screen on Hackintosh.
Do you have -v activated @ boot ?
Open the Terminal utility and run the following command:
sudo nvram boot-args="-v"
Rebooting your system should have the system invoke verbose mode at every boot. You can clear this by running the following command:
sudo nvram boot-args=""
When logging in Remote what does your System Report say about Grafiks ?
Do you have -v activated @ boot ?
Open the Terminal utility and run the following command:
sudo nvram boot-args="-v"
Rebooting your system should have the system invoke verbose mode at every boot. You can clear this by running the following command:
sudo nvram boot-args=""
When logging in Remote what does your System Report say about Grafiks ?
The 7,1 chimed when I plugged in the monitor, but still no video and the monitor power light is orange, signaling no video.
I had to learn about system_profiler. It verifies that the 7,1 was updated from 12.6.x to 12.7.1 so it did update.
What am in looking for in SPDisplaysDataType? I don't see Grafiks.
Incidentally, the card is AMD Radeon Pro 580X.
Booting verbose didn't help. I verified that boot-args was "-v" with nvram.
During POST, the 7,1 should only use the firmware's UEFI GOP to drive the monitor, but not any OS driver.
If your 7,1 boot very fast, you can hold Option key boot. This should hold the 7,1 at the Apple startup manager.
If your monitor can't display anything at this stage. Then it has nothing to do with 12.7.1. Please try another cable etc. 99% hardware failure.
You should not have -v with nvram, but i wonder you are using a 580X in MacPro7,1
The 580X seems to have only 2 HDMI Ports, how do you connect the Monitors and what does the System Profiler show ?
On my Hacky it shows also in Remote:
On my German System it shows up like this:
Then you can see if your Card shows up and how.
If the Monitor shows up under Displays you can try to set fixed refresh rate and change resolution....
Post your views.....
I can configure my Displays also while Connecting Remote...
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Holding the Option key seems to have stopped it at boot selection as it won't respond to ping but no video. I agree, this is looking like hardware but it is so strange to fail on reboot after the update to 12.7.1. Unless the update borked the firmware.
I don't know how to post views without a working display.
system_profiler SPDisplayDataType says the 7,1 has a 580X and two displays. Yes, it only has two HDMI ports and that is the way it came from apple when I ordered it in Dec 2021.
So your System is reporting Displays and Grafik Card, you should then as i described be alle to go Remote to Display and change the Refresh Rate to a fixer value......
The Genius Bar first thought the problem was the video MPX, but it turned out that a firmware refresh solved the problem. Apparently, the firmware got munged during the 12.6.x to 12.7.1 update.
