Problems with PCIe passthrough with two identical devices

Figured I'd chime in to add myself to the list of people having this problem. My newly-acquired UGreen DXP8800 Plus has the two ASMedia ASM1164 controllers in it, and the second one is not visible to a VM (tried Unraid and DSM/Arc Loader) no matter what kind off passing through I try. I tried the solutions on this page of the thread and nothing works. Like @elvito noticed, the controllers disappear from the host UI once the VM is started, but the VM cannot see any drives attached to it.

I have not put this node into "production" (it's just a homelab, really) yet, so I am still at a point where I can experiment with any potential solutions there are. Hoping someone has the magic one for all of us!
 
If you try a reset on a device, that has problems with a reset (during operation), then the logical consequence is, that the device will no longer be accessible.

So, either someone is actually willing to try out, what was proposed, or most likely nothing will happen.
If everyone is just waiting for someone else to fix the issue, this could take a LONG time. :)
You all obviously chose to use Open Source Software, so now you actually have the chance to contribute.
 
celemine1gig said:
If you try a reset on a device, that has problems with a reset (during operation), then the logical consequence is, that the device will no longer be accessible.

So, either someone is actually willing to try out, what was proposed, or most likely nothing will happen.
If everyone is just waiting for someone else to fix the issue, this could take a LONG time. :)
You all obviously chose to use Open Source Software, so now you actually have the chance to contribute.
Click to expand...
I'm happy to try just about anything (especially while still in the return period for the UGreen ), but after looking at your kernel quirk and firmware suggestions I decided they were over my head without a step by step guide.
 
patchrick84 said:
I'm happy to try just about anything (especially while still in the return period for the UGreen ), but after looking at your kernel quirk and firmware suggestions I decided they were over my head without a step by step guide.
Click to expand...
My answer was not directed at any one person in particular. So, it is completely fair to say, that you cannot do this.

Main point is:
Someone will have to try it. My suggestion is far from being proven. Only way however, in order to find out, is someone actually trying it, or coming up with another idea.
As long as everyone just says "same here", it will stay the way it is. Which is not working, if I am not mistaking. So, if someone knows how to do this and is actually affected, maybe think about it. If I had the time, currently, I would build you a test kernel. However, currently I sadly have bigger fish to fry.
 
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