June 18, 20242 yr I have a linux VM and passing through a USB controller. It is working fine with 1 USB hub. If I plug a second one in, nothing is detected. Either by the VM or Unraid. If I plug a device into that same port it is seen in the VM. Is this just a limitation with KVM or am I just missing something? tower-diagnostics-20240617-1932.zip Edited June 18, 20242 yr by jmztaylor
June 18, 20242 yr 5 hours ago, jmztaylor said: I have a linux VM and passing through a USB controller. It is working fine with 1 USB hub. If I plug a second one in, nothing is detected. Either by the VM or Unraid. If I plug a device into that same port it is seen in the VM. Is this just a limitation with KVM or am I just missing something? tower-diagnostics-20240617-1932.zip 200.73 kB · 0 downloads If the PCI device is passed through to the VM then the host will not see any issues. Is this on your Ubuntu VM? Anything in the logs on the VM?
June 18, 20242 yr Author 8 hours ago, SimonF said: If the PCI device is passed through to the VM then the host will not see any issues. Is this on your Ubuntu VM? Anything in the logs on the VM? Dmesg shows nothing at all when plugging the hub in. Or when plugging a device into the hub. But plugging the device into the same port the hub was plugged into, it shows up and functions normally.
June 25, 20242 yr 15 hours ago, jmztaylor said: Any tips on what to check? Does it work correctly when no passed thru to the VM? Is the port faulty?
June 27, 20242 yr Author On 6/25/2024 at 1:01 AM, SimonF said: Does it work correctly when no passed thru to the VM? Is the port faulty? It works perfectly fine in all other scenarios. As unlikely as it is, is it possible since both hubs are identical its just breaking something internally?
June 27, 20242 yr 4 hours ago, jmztaylor said: It works perfectly fine in all other scenarios. As unlikely as it is, is it possible since both hubs are identical its just breaking something internally? Very strange dont have any suggestions
July 3, 20242 yr Author On 6/27/2024 at 1:59 PM, SimonF said: Very strange dont have any suggestions Ultimately, I think it comes down to just cheap usb hub and reusing device Ids or something. As using 2 of the same hubs, 1 always doesn't work but if i switch it out to another it works.
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