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dbacc

Member

Registered: 2014-09-25

Posts: 120

AMD RX 7900 XTX + AOOSTAR AG02 eGPU over USB4 -> PSP load failed

I’m trying to get my AMD eGPU setup working on my ThinkPad T14 Gen 5 (AMD) with kernel 6.17, but I’m running into persistent failures. I’d like some guidance on whether this combination is supported or if there are workarounds.

Hardware:

*    Laptop: Lenovo ThinkPad T14 Gen 5 (AMD CPU + AMD integrated GPU)

*    eGPU enclosure: AOOSTAR AG02 (ASM2464 USB4/Thunderbolt bridge)

*    GPU: AMD RX 7900 XTX

dmesg shows the following problems:

[ 2580.402458] amdgpu 0000:08:00.0: amdgpu: ring mes_kiq_3.1.0 uses VM inv eng 14 on hub 0
[ 2580.407346] amdgpu 0000:08:00.0: [drm] Cannot find any crtc or sizes
[ 2586.636312] amdgpu 0000:08:00.0: amdgpu: psp gfx command UNLOAD_TA(0x2) failed and response status is (0x117)
...
[ 2596.831956] pcieport 0000:05:00.0: pciehp: Timeout on hotplug command 0x1038

The device is succesfully recognized with boltctl though.

I've also seen this limiting to x1 PCIe link

dmesg | grep PCIe
[   16.339480] pci 0000:64:00.0: [8086:0b26] type 01 class 0x060400 PCIe Switch Upstream Port
[   16.340382] pci 0000:64:00.0: 2.000 Gb/s available PCIe bandwidth, limited by 2.5 GT/s PCIe x1 link at 0000:00:04.1 (capable of 8.000 Gb/s with 2.5 GT/s PCIe x4 link)
[   16.343606] pci 0000:65:00.0: [8086:0b26] type 01 class 0x060400 PCIe Switch Downstream Port
[   16.344231] pci 0000:65:01.0: [8086:0b26] type 01 class 0x060400 PCIe Switch Downstream Port
[   16.344847] pci 0000:65:02.0: [8086:0b26] type 01 class 0x060400 PCIe Switch Downstream Port
[   16.345492] pci 0000:65:03.0: [8086:0b26] type 01 class 0x060400 PCIe Switch Downstream Port
[   16.346044] pci 0000:65:04.0: [8086:0b26] type 01 class 0x060400 PCIe Switch Downstream Port
[  282.094872] pci 0000:04:00.0: [1b21:2461] type 01 class 0x060400 PCIe Switch Upstream Port
[  282.098595] pci 0000:05:00.0: [1b21:2461] type 01 class 0x060400 PCIe Switch Downstream Port
[  282.099653] pci 0000:06:00.0: [1002:1478] type 01 class 0x060400 PCIe Switch Upstream Port
[  282.100093] pci 0000:06:00.0: 2.000 Gb/s available PCIe bandwidth, limited by 2.5 GT/s PCIe x1 link at 0000:00:03.1 (capable of 252.048 Gb/s with 16.0 GT/s PCIe x16 link)
[  282.100432] pci 0000:07:00.0: [1002:1479] type 01 class 0x060400 PCIe Switch Downstream Port
[  282.101234] pci 0000:08:00.0: [1002:744c] type 00 class 0x030000 PCIe Legacy Endpoint
[  282.101746] pci 0000:08:00.0: 2.000 Gb/s available PCIe bandwidth, limited by 2.5 GT/s PCIe x1 link at 0000:00:03.1 (capable of 252.048 Gb/s with 16.0 GT/s PCIe x16 link)
[  282.101994] pci 0000:08:00.1: [1002:ab30] type 00 class 0x040300 PCIe Legacy Endpoint

which may be the root cause. The question is of course why this happens? Is there any kind of workaround for this?