root@debian:/home/tom# lspci -vnnk
02:00.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Vega 10 PCIe Bridge [1022:1470] (rev 01) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 26, NUMA node 0, IOMMU group 24
Memory at cf500000 (32-bit, non-prefetchable) [size=16K]
Bus: primary=02, secondary=03, subordinate=05, sec-latency=0
I/O behind bridge: [disabled]
Memory behind bridge: cea00000-cf4fffff [size=11M]
Prefetchable memory behind bridge: 000003bef0000000-000003bff1ffffff [size=4128M]
Capabilities: [48] Vendor Specific Information: Len=08 <?>
Capabilities: [50] Power Management version 3
Capabilities: [58] Express Upstream Port, MSI 00
Capabilities: [a0] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
Capabilities: [150] Advanced Error Reporting
Capabilities: [270] Secondary PCI Express
Capabilities: [320] Latency Tolerance Reporting
Capabilities: [370] L1 PM Substates
Kernel driver in use: pcieport
03:00.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Vega 10 PCIe Bridge [1022:1471] (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 34, NUMA node 0, IOMMU group 25
Bus: primary=03, secondary=04, subordinate=05, sec-latency=0
I/O behind bridge: [disabled]
Memory behind bridge: cea00000-cf4fffff [size=11M]
Prefetchable memory behind bridge: 000003bef0000000-000003bff1ffffff [size=4128M]
Capabilities: [50] Power Management version 3
Capabilities: [58] Express Downstream Port (Slot-), MSI 00
Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
Capabilities: [c0] Subsystem: Advanced Micro Devices, Inc. [AMD] Vega 10 PCIe Bridge [1022:1471]
Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
Capabilities: [150] Advanced Error Reporting
Capabilities: [270] Secondary PCI Express
Capabilities: [2a0] Access Control Services
Kernel driver in use: pcieport
04:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Vega 10 [Radeon Instinct MI25] [1002:6860] (rev 01) (prog-if 00 [VGA controller])
Subsystem: Advanced Micro Devices, Inc. [AMD/ATI] Radeon PRO V320 [1002:0c35]
Flags: fast devsel, IRQ 26, NUMA node 0, IOMMU group 26
Memory at <unassigned> (64-bit, prefetchable)
Memory at cea00000 (64-bit, prefetchable) [size=2M]
Memory at cf400000 (32-bit, non-prefetchable) [size=512K]
Expansion ROM at cf480000 [disabled] [size=128K]
Capabilities: [48] Vendor Specific Information: Len=08 <?>
Capabilities: [50] Power Management version 3
Capabilities: [64] Express Legacy Endpoint, MSI 00
Capabilities: [a0] MSI: Enable- Count=1/4 Maskable+ 64bit+
Capabilities: [c0] MSI-X: Enable- Count=3 Masked-
Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
Capabilities: [150] Advanced Error Reporting
Capabilities: [270] Secondary PCI Express
Capabilities: [2a0] Access Control Services
Capabilities: [2b0] Address Translation Service (ATS)
Capabilities: [2c0] Page Request Interface (PRI)
Capabilities: [2d0] Process Address Space ID (PASID)
Capabilities: [320] Latency Tolerance Reporting
Capabilities: [328] Alternative Routing-ID Interpretation (ARI)
Capabilities: [330] Single Root I/O Virtualization (SR-IOV)
Capabilities: [400] Vendor Specific Information: ID=0002 Rev=2 Len=0f0 <?>
Kernel driver in use: amdgpu
Kernel modules: amdgpu
0a:00.0 PCI bridge [0604]: ASPEED Technology, Inc. AST1150 PCI-to-PCI Bridge [1a03:1150] (rev 02) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 19, NUMA node 0, IOMMU group 29
Bus: primary=0a, secondary=0b, subordinate=0b, sec-latency=32
I/O behind bridge: 00006000-00006fff [size=4K]
Memory behind bridge: cd000000-ce0fffff [size=17M]
Prefetchable memory behind bridge: [disabled]
Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [78] Power Management version 3
Capabilities: [80] Express PCI-Express to PCI/PCI-X Bridge, MSI 00
Capabilities: [a4] Subsystem: ASPEED Technology, Inc. AST1150 PCI-to-PCI Bridge [1a03:1150]
Capabilities: [100] Virtual Channel
0b:00.0 VGA compatible controller [0300]: ASPEED Technology, Inc. ASPEED Graphics Family [1a03:2000] (rev 21) (prog-if 00 [VGA controller])
Subsystem: ASUSTeK Computer Inc. ASPEED Graphics Family [1043:84eb]
Flags: medium devsel, IRQ 19, NUMA node 0, IOMMU group 29
Memory at cd000000 (32-bit, non-prefetchable) [size=16M]
Memory at ce000000 (32-bit, non-prefetchable) [size=128K]
I/O ports at 6000 [size=128]
Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
Capabilities: [40] Power Management version 3
Kernel driver in use: ast
Kernel modules: ast
84:00.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Vega 10 PCIe Bridge [1022:1470] (rev 01) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 41, NUMA node 1, IOMMU group 74
Memory at fba00000 (32-bit, non-prefetchable) [size=16K]
Bus: primary=84, secondary=85, subordinate=87, sec-latency=0
I/O behind bridge: [disabled]
Memory behind bridge: fb100000-fb9fffff [size=9M]
Prefetchable memory behind bridge: 000003f800000000-000003fd021fffff [size=20514M]
Capabilities: [48] Vendor Specific Information: Len=08 <?>
Capabilities: [50] Power Management version 3
Capabilities: [58] Express Upstream Port, MSI 00
Capabilities: [a0] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
Capabilities: [150] Advanced Error Reporting
Capabilities: [270] Secondary PCI Express
Capabilities: [320] Latency Tolerance Reporting
Capabilities: [370] L1 PM Substates
Kernel driver in use: pcieport
85:00.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Vega 10 PCIe Bridge [1022:1471] (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 43, NUMA node 1, IOMMU group 75
Bus: primary=85, secondary=86, subordinate=87, sec-latency=0
I/O behind bridge: [disabled]
Memory behind bridge: fb100000-fb9fffff [size=9M]
Prefetchable memory behind bridge: 000003f800000000-000003fd021fffff [size=20514M]
Capabilities: [50] Power Management version 3
Capabilities: [58] Express Downstream Port (Slot-), MSI 00
Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
Capabilities: [c0] Subsystem: Advanced Micro Devices, Inc. [AMD] Vega 10 PCIe Bridge [1022:1471]
Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
Capabilities: [150] Advanced Error Reporting
Capabilities: [270] Secondary PCI Express
Capabilities: [2a0] Access Control Services
Kernel driver in use: pcieport
86:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Vega 10 [Radeon Instinct MI25] [1002:6860] (rev 01) (prog-if 00 [VGA controller])
Subsystem: Advanced Micro Devices, Inc. [AMD/ATI] Radeon PRO V320 [1002:0c35]
Flags: fast devsel, IRQ 11, NUMA node 1, IOMMU group 76
Memory at 3f800000000 (64-bit, prefetchable) [disabled] [size=16G]
Memory at 3fd02000000 (64-bit, prefetchable) [disabled] [size=2M]
Memory at fb900000 (32-bit, non-prefetchable) [disabled] [size=512K]
Expansion ROM at fb980000 [disabled] [size=128K]
Capabilities: [48] Vendor Specific Information: Len=08 <?>
Capabilities: [50] Power Management version 3
Capabilities: [64] Express Legacy Endpoint, MSI 00
Capabilities: [a0] MSI: Enable- Count=1/4 Maskable+ 64bit+
Capabilities: [c0] MSI-X: Enable- Count=3 Masked-
Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
Capabilities: [150] Advanced Error Reporting
Capabilities: [270] Secondary PCI Express
Capabilities: [2a0] Access Control Services
Capabilities: [2b0] Address Translation Service (ATS)
Capabilities: [2c0] Page Request Interface (PRI)
Capabilities: [2d0] Process Address Space ID (PASID)
Capabilities: [320] Latency Tolerance Reporting
Capabilities: [328] Alternative Routing-ID Interpretation (ARI)
Capabilities: [330] Single Root I/O Virtualization (SR-IOV)
Capabilities: [400] Vendor Specific Information: ID=0002 Rev=2 Len=0f0 <?>
Kernel modules: amdgpu
ff:08.0 System peripheral [0880]: Intel Corporation Xeon E5/Core i7 QPI Link 0 [8086:3c80] (rev 07)
Subsystem: ASUSTeK Computer Inc. Xeon E5/Core i7 QPI Link 0 [1043:84f0]
Flags: fast devsel, NUMA node 1, IOMMU group 77
root@debian:/home/tom# dmesg -k
[ 1098.998678] amdgpu: trn=2 ACK should not assert! wait again !
[ 1099.014685] amdgpu: trn=2 ACK should not assert! wait again !
[ 1099.030686] amdgpu: trn=2 ACK should not assert! wait again !
[ 1099.046681] amdgpu: trn=2 ACK should not assert! wait again !
[ 1099.062683] amdusw...