April 24, 20233 yr I have a CX341a plugged into my motherboard with a split card. But I couldn't passthrough it to my openwrt vm, it always said that Failed to set up TRIGGER eventfd signaling for interrupt INTX-0: VFIO_DEVICE_SET_IRQS failure: Device or resource busy. I've tried to change the options of PCIe ACS but it didn't work. lzydiskstation-diagnostics-20230424-0840.zip
May 3, 20233 yr Your issue is with irq conflicts: Apr 24 08:34:35 LZYDiskStation kernel: genirq: Flags mismatch irq 16. 00000000 (vfio-intx(0000:01:00.0)) vs. 00000080 (i801_smbus) where 01:00.0 (mellanox) conflicts with the SMBus. 1. update the bios (if any is available) and see if the irq conflict disappears 2. change the phisical slot of the mellanox and see if the irq conflict disappears 3. check in your bios if you can manually assign irqs to devices (I don't think you have this option..) If you aren't able to solve with these suggestions I think there's nothing more you can do..
May 10, 20233 yr Author thank you for your solutions but my bios is up to date and my z490i doesn't have a second pcie slot. As for the last solution, obviously I can't change it mannually. I gave up to pass through the cx341a.
June 2, 20233 yr I am having the same problem with MCX312 after replacing intel X520 da1. Sad to know there is nothing more can be done.
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