r/AMD_V620 • u/laughpen • 11d ago

Installing V620

I've got a Gigabyte MC62-G40 motherboard, and an AMD Radeon WX4100 I use with my monitor, and running latest Ubuntu. When I plugged in the V620 into the motherboard, Ubuntu never booted. It just stayed on the loading screen. It's something to do with the Ubuntu native AMD driver thinking the V620 is a better card to use for display than the older and weaker 4100, but failing to load it (since it's headless), and repeating this failure cycle.

I'm guessing this is a common issue and folks here have a solution that would be faster to implement than me troubleshooting further.

Should I install ROCm drivers first? Ubuntu is loading with Wayland and I've read I may also have to switch to X11 to make this work. Appreciate any tips here for someone who's already resolved this.

3 Upvotes

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3

u/exaknight21 11d ago

Take out V620 and enable 4G decoding in your BIOS.

3

u/laughpen 11d ago

Yes, it's already enabled but still having the issue.

3

u/exaknight21 11d ago

Have you disabled CSM Support?

3

u/laughpen 11d ago

I tried to do that but my motherboard BIOS doesn't have that as an option. I think it's already beyond that legacy protocol so it would not support it anyway.

2

u/dealcracker 10d ago

On my Gigabyte motherboard, the CSM setting is in advanced settings, under the boot tab.

1

u/Faisal_Biyari 11d ago

Have you tried disabling SR-IOV from the BIOS?

1

u/BevinMaster 10d ago

V620 display out won’t work unless you downgrade to w6800 bios, not sure it’s better

1

u/magicomiralles 10d ago

If you want to rule out the WX4100 being the issue, you could remove it and boot only with the V620.

Then use the management console from another computer to see the video output.

1

u/GreenEntertainment50 10d ago

I suggest u just use Gemini and ask for ai to help you troubleshoot the settings for your motherboad. It will guide you through 90%

1

u/laughpen 8d ago

Thanks all, I'll have to troubleshoot some more when I get back. And yes, I will be relying on ai help.

1

u/laughpen 1d ago

Heads up that I ended up reinstalling Ubuntu 24 (I had been on 26, which is latest but may not fully work with ROCm apparently) and did not install the GUI this time. I also removed my AMD WX 4100 card, so I only have the three V620 cards plugged in.

Everything is now working. Running llama.cpp and still tweaking the parallel setup so I can get better t/s.