jmztaylor Posted June 18 Share Posted June 18 (edited) 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 by jmztaylor Quote Link to comment
SimonF Posted June 18 Share Posted June 18 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? Quote Link to comment
jmztaylor Posted June 18 Author Share Posted June 18 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. Quote Link to comment
jmztaylor Posted June 24 Author Share Posted June 24 Any tips on what to check? Quote Link to comment
SimonF Posted June 25 Share Posted June 25 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? Quote Link to comment
jmztaylor Posted June 27 Author Share Posted June 27 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? Quote Link to comment
SimonF Posted June 27 Share Posted June 27 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 Quote Link to comment
jmztaylor Posted July 3 Author Share Posted July 3 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. Quote Link to comment
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