I am having exactly the same issue with exactly the same controller.
I am trying to pass:
IOMMU group 14:[1b21:2142] 05:00.0 USB controller: ASMedia Technology Inc. ASM2142 USB 3.1 Host Controller
Below are all the details:
Script location: /tmp/user.scripts/tmpScripts/devices_info/script
Note that closing this window will abort the execution of this script
Bus 1 --> 0000:00:14.0 (IOMMU group 3)
Bus 001 Device 003: ID 0b05:1872 ASUSTek Computer, Inc.
Bus 001 Device 002: ID 0b05:185c ASUSTek Computer, Inc.
Bus 001 Device 006: ID 0781:5567 SanDisk Corp. Cruzer Blade
Bus 001 Device 005: ID 0764:0501 Cyber Power System, Inc. CP1500 AVR UPS
Bus 001 Device 004: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 2 --> 0000:00:14.0 (IOMMU group 3)
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 3 --> 0000:05:00.0 (IOMMU group 14)
Bus 003 Device 002: ID 0409:005a NEC Corp. HighSpeed Hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 4 --> 0000:05:00.0 (IOMMU group 14)
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
IOMMU group 7
[RESET] 00:1c.0 PCI bridge [0604]: Intel Corporation 200 Series PCH PCI Express Root Port #1 [8086:a290] (rev f0)
IOMMU group 15
[RESET] 06:00.0 SATA controller [0106]: ASMedia Technology Inc. ASM1062 Serial ATA Controller [1b21:0612] (rev 02)
IOMMU group 5
00:17.0 SATA controller [0106]: Intel Corporation 200 Series PCH SATA controller [AHCI mode] [8086:a282]
IOMMU group 13
[RESET] 00:1f.6 Ethernet controller [0200]: Intel Corporation Ethernet Connection (2) I219-V [8086:15b8]
IOMMU group 3
00:14.0 USB controller [0c03]: Intel Corporation 200 Series/Z370 Chipset Family USB 3.0 xHCI Controller [8086:a2af]
IOMMU group 11
[RESET] 00:1d.0 PCI bridge [0604]: Intel Corporation 200 Series PCH PCI Express Root Port #9 [8086:a298] (rev f0)
IOMMU group 1
00:01.0 PCI bridge [0604]: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor PCIe Controller (x16) [8086:1901] (rev 0a)
[RESET] 01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GM206 [GeForce GTX 960] [10de:1401] (rev a1)
01:00.1 Audio device [0403]: NVIDIA Corporation GM206 High Definition Audio Controller [10de:0fba] (rev a1)
IOMMU group 8
[RESET] 00:1c.2 PCI bridge [0604]: Intel Corporation 200 Series PCH PCI Express Root Port #3 [8086:a292] (rev f0)
IOMMU group 16
[RESET] 07:00.0 Non-Volatile memory controller [0108]: Samsung Electronics Co Ltd NVMe SSD Controller SM981/PM981 [144d:a808]
IOMMU group 6
[RESET] 00:1b.0 PCI bridge [0604]: Intel Corporation 200 Series PCH PCI Express Root Port #17 [8086:a2e7] (rev f0)
IOMMU group 14
[RESET] 05:00.0 USB controller [0c03]: ASMedia Technology Inc. ASM2142 USB 3.1 Host Controller [1b21:2142]
IOMMU group 4
00:16.0 Communication controller [0780]: Intel Corporation 200 Series PCH CSME HECI #1 [8086:a2ba]
IOMMU group 12
00:1f.0 ISA bridge [0601]: Intel Corporation Z370 Chipset LPC/eSPI Controller [8086:a2c9]
00:1f.2 Memory controller [0580]: Intel Corporation 200 Series/Z370 Chipset Family Power Management Controller [8086:a2a1]
00:1f.3 Audio device [0403]: Intel Corporation 200 Series PCH HD Audio [8086:a2f0]
00:1f.4 SMBus [0c05]: Intel Corporation 200 Series/Z370 Chipset Family SMBus Controller [8086:a2a3]
IOMMU group 2
[RESET] 00:02.0 VGA compatible controller [0300]: Intel Corporation UHD Graphics 630 (Desktop 9 Series) [8086:3e98]
IOMMU group 10
[RESET] 00:1c.7 PCI bridge [0604]: Intel Corporation 200 Series PCH PCI Express Root Port #8 [8086:a297] (rev f0)
IOMMU group 0
00:00.0 Host bridge [0600]: Intel Corporation 8th Gen Core 8-core Desktop Processor Host Bridge/DRAM Registers [Coffee Lake S] [8086:3e30] (rev 0a)
IOMMU group 9
[RESET] 00:1c.4 PCI bridge [0604]: Intel Corporation 200 Series PCH PCI Express Root Port #5 [8086:a294] (rev f0)