Thanks for the information. I will try the patch later today. For now here's the output of lspci -vt and lspci -x lspci -vt -[0000:00]-+-00.0 Advanced Micro Devices, Inc. [AMD] Starship/Matisse Root Complex +-00.2 Advanced Micro Devices, Inc. [AMD] Starship/Matisse IOMMU +-01.0 Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe Dummy Host Bridge +-01.2-[02-2a]--+-00.0 Advanced Micro Devices, Inc. [AMD] 500 Series Chipset USB 3.1 XHCI Controller | +-00.1 Advanced Micro Devices, Inc. [AMD] 500 Series Chipset SATA Controller | \-00.2-[03-2a]--+-07.0-[04]----00.0 Realtek Semiconductor Co., Ltd. RTL8852BE PCIe 802.11ax Wireless Network Controller | \-09.0-[2a]----00.0 Realtek Semiconductor Co., Ltd. RTL8111/8168/8211/8411 PCI Express Gigabit Ethernet Controller +-02.0 Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe Dummy Host Bridge +-03.0 Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe Dummy Host Bridge +-03.1-[2b-2d]----00.0-[2c-2d]----00.0-[2d]--+-00.0 Advanced Micro Devices, Inc. [AMD/ATI] Navi 23 [Radeon RX 6600/6600 XT/6600M] | \-00.1 Advanced Micro Devices, Inc. [AMD/ATI] Navi 21/23 HDMI/DP Audio Controller +-04.0 Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe Dummy Host Bridge +-05.0 Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe Dummy Host Bridge +-07.0 Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe Dummy Host Bridge +-07.1-[2e]----00.0 Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe Dummy Function +-08.0 Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe Dummy Host Bridge +-08.1-[2f]--+-00.0 Advanced Micro Devices, Inc. [AMD] Starship/Matisse Reserved SPP | +-00.1 Advanced Micro Devices, Inc. [AMD] Starship/Matisse Cryptographic Coprocessor PSPCPP | +-00.3 Advanced Micro Devices, Inc. [AMD] Matisse USB 3.0 Host Controller | \-00.4 Advanced Micro Devices, Inc. [AMD] Starship/Matisse HD Audio Controller +-08.3-[31]----00.0 Advanced Micro Devices, Inc. [AMD] FCH SATA Controller [AHCI mode] +-14.0 Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller +-14.3 Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge +-18.0 Advanced Micro Devices, Inc. [AMD] Matisse/Vermeer Data Fabric: Device 18h; Function 0 +-18.1 Advanced Micro Devices, Inc. [AMD] Matisse/Vermeer Data Fabric: Device 18h; Function 1 +-18.2 Advanced Micro Devices, Inc. [AMD] Matisse/Vermeer Data Fabric: Device 18h; Function 2 +-18.3 Advanced Micro Devices, Inc. [AMD] Matisse/Vermeer Data Fabric: Device 18h; Function 3 +-18.4 Advanced Micro Devices, Inc. [AMD] Matisse/Vermeer Data Fabric: Device 18h; Function 4 +-18.5 Advanced Micro Devices, Inc. [AMD] Matisse/Vermeer Data Fabric: Device 18h; Function 5 +-18.6 Advanced Micro Devices, Inc. [AMD] Matisse/Vermeer Data Fabric: Device 18h; Function 6 \-18.7 Advanced Micro Devices, Inc. [AMD] Matisse/Vermeer Data Fabric: Device 18h; Function 7 and lspci -x ✔ 00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse Root Complex 00: 22 10 80 14 00 00 00 00 00 00 00 06 00 00 80 00 10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 62 14 56 7c 30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00:00.2 IOMMU: Advanced Micro Devices, Inc. [AMD] Starship/Matisse IOMMU 00: 22 10 81 14 40 04 10 00 00 00 06 08 00 00 80 00 10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 62 14 56 7c 30: 00 00 00 00 40 00 00 00 00 00 00 00 ff 00 00 00 00:01.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe Dummy Host Bridge 00: 22 10 82 14 00 00 00 00 00 00 00 06 00 00 80 00 10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00:01.2 PCI bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse GPP Bridge 00: 22 10 83 14 07 04 10 00 00 00 04 06 10 00 81 00 10: 00 00 00 00 00 00 00 00 00 02 2a 00 d1 e1 00 20 20: c0 fc e0 fc f1 ff 01 00 00 00 00 00 00 00 00 00 30: 00 00 00 00 50 00 00 00 00 00 00 00 ff 00 12 00 00:02.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe Dummy Host Bridge 00: 22 10 82 14 00 00 00 00 00 00 00 06 00 00 80 00 10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00:03.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe Dummy Host Bridge 00: 22 10 82 14 00 00 00 00 00 00 00 06 00 00 80 00 10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00:03.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse GPP Bridge 00: 22 10 83 14 07 04 10 00 00 00 04 06 10 00 81 00 10: 00 00 00 00 00 00 00 00 00 2b 2d 00 f1 f1 00 00 20: 90 fc b0 fc 01 00 f1 0f 7c 00 00 00 7e 00 00 00 30: 00 00 00 00 50 00 00 00 00 00 00 00 ff 00 12 00 00:04.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe Dummy Host Bridge 00: 22 10 82 14 00 00 00 00 00 00 00 06 00 00 80 00 10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00:05.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe Dummy Host Bridge 00: 22 10 82 14 00 00 00 00 00 00 00 06 00 00 80 00 10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00:07.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe Dummy Host Bridge 00: 22 10 82 14 00 00 00 00 00 00 00 06 00 00 80 00 10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00:07.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse Internal PCIe GPP Bridge 0 to bus[E:B] 00: 22 10 84 14 07 04 10 00 00 00 04 06 10 00 81 00 10: 00 00 00 00 00 00 00 00 00 2e 2e 00 f1 01 00 00 20: f0 ff 00 00 f1 ff 01 00 00 00 00 00 00 00 00 00 30: 00 00 00 00 50 00 00 00 00 00 00 00 ff 01 12 00 00:08.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe Dummy Host Bridge 00: 22 10 82 14 00 00 00 00 00 00 00 06 00 00 80 00 10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00:08.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse Internal PCIe GPP Bridge 0 to bus[E:B] 00: 22 10 84 14 07 04 10 00 00 00 04 06 10 00 81 00 10: 00 00 00 00 00 00 00 00 00 2f 2f 00 f1 01 00 00 20: 60 fc 80 fc f1 ff 01 00 00 00 00 00 00 00 00 00 30: 00 00 00 00 50 00 00 00 00 00 00 00 ff 01 12 00 00:08.3 PCI bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse Internal PCIe GPP Bridge 0 to bus[E:B] 00: 22 10 84 14 07 04 10 00 00 00 04 06 10 00 81 00 10: 00 00 00 00 00 00 00 00 00 31 31 00 f1 01 00 00 20: f0 fc f0 fc f1 ff 01 00 00 00 00 00 00 00 00 00 30: 00 00 00 00 50 00 00 00 00 00 00 00 ff 01 12 00 00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller (rev 61) 00: 22 10 0b 79 03 04 20 02 61 00 05 0c 00 00 80 00 10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 62 14 56 7c 30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge (rev 51) 00: 22 10 0e 79 0f 00 20 02 51 00 01 06 00 00 80 00 10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 62 14 56 7c 30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse/Vermeer Data Fabric: Device 18h; Function 0 00: 22 10 40 14 00 00 00 00 00 00 00 06 00 00 80 00 10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse/Vermeer Data Fabric: Device 18h; Function 1 00: 22 10 41 14 00 00 00 00 00 00 00 06 00 00 80 00 10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse/Vermeer Data Fabric: Device 18h; Function 2 00: 22 10 42 14 00 00 00 00 00 00 00 06 00 00 80 00 10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse/Vermeer Data Fabric: Device 18h; Function 3 00: 22 10 43 14 00 00 00 00 00 00 00 06 00 00 80 00 10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00:18.4 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse/Vermeer Data Fabric: Device 18h; Function 4 00: 22 10 44 14 00 00 00 00 00 00 00 06 00 00 80 00 10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00:18.5 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse/Vermeer Data Fabric: Device 18h; Function 5 00: 22 10 45 14 00 00 00 00 00 00 00 06 00 00 80 00 10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00:18.6 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse/Vermeer Data Fabric: Device 18h; Function 6 00: 22 10 46 14 00 00 00 00 00 00 00 06 00 00 80 00 10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00:18.7 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse/Vermeer Data Fabric: Device 18h; Function 7 00: 22 10 47 14 00 00 00 00 00 00 00 06 00 00 80 00 10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 02:00.0 USB controller: Advanced Micro Devices, Inc. [AMD] 500 Series Chipset USB 3.1 XHCI Controller 00: 22 10 ee 43 06 04 10 00 00 30 03 0c 10 00 80 00 10: 04 00 ea fc 00 00 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 21 1b 42 11 30: 00 00 00 00 50 00 00 00 00 00 00 00 ff 01 00 00 02:00.1 SATA controller: Advanced Micro Devices, Inc. [AMD] 500 Series Chipset SATA Controller 00: 22 10 eb 43 06 04 10 00 00 01 06 01 10 00 80 00 10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 e8 fc 00 00 00 00 21 1b 62 10 30: 00 00 e0 fc 50 00 00 00 00 00 00 00 ff 02 00 00 02:00.2 PCI bridge: Advanced Micro Devices, Inc. [AMD] 500 Series Chipset Switch Upstream Port 00: 22 10 e9 43 07 00 10 00 00 00 04 06 10 00 81 00 10: 00 00 00 00 00 00 00 00 02 03 2a 00 d1 e1 00 00 20: c0 fc d0 fc f1 ff 01 00 00 00 00 00 00 00 00 00 30: 00 00 00 00 50 00 00 00 00 00 00 00 ff 03 12 00 03:07.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 43ea 00: 22 10 ea 43 07 04 10 00 00 00 04 06 10 00 01 00 10: 00 00 00 00 00 00 00 00 03 04 04 00 e1 e1 00 00 20: d0 fc d0 fc f1 ff 01 00 00 00 00 00 00 00 00 00 30: 00 00 00 00 50 00 00 00 00 00 00 00 ff 01 12 00 03:09.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 43ea 00: 22 10 ea 43 07 04 10 00 00 00 04 06 10 00 01 00 10: 00 00 00 00 00 00 00 00 03 2a 2a 00 d1 d1 00 00 20: c0 fc c0 fc f1 ff 01 00 00 00 00 00 00 00 00 00 30: 00 00 00 00 50 00 00 00 00 00 00 00 ff 01 12 00 04:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8852BE PCIe 802.11ax Wireless Network Controller 00: ec 10 52 b8 07 04 10 00 00 00 80 02 10 00 00 00 10: 01 e0 00 00 00 00 00 00 04 00 d0 fc 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 3b 1a 70 54 30: 00 00 00 00 40 00 00 00 00 00 00 00 ff 01 00 00 2a:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8211/8411 PCI Express Gigabit Ethernet Controller (rev 15) 00: ec 10 68 81 07 04 10 00 15 00 00 02 10 00 00 00 10: 01 d0 00 00 00 00 00 00 04 40 c0 fc 00 00 00 00 20: 04 00 c0 fc 00 00 00 00 00 00 00 00 62 14 56 7c 30: 00 00 00 00 40 00 00 00 00 00 00 00 ff 01 00 00 2b:00.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] Navi 10 XL Upstream Port of PCI Express Switch (rev c7) 00: 02 10 78 14 07 00 10 00 c7 00 04 06 10 00 01 00 10: 00 00 b0 fc 00 00 00 00 2b 2c 2d 00 f1 f1 00 00 20: 90 fc a0 fc 01 00 f1 0f 7c 00 00 00 7e 00 00 00 30: 00 00 00 00 48 00 00 00 00 00 00 00 ff 01 12 00 2c:00.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] Navi 10 XL Downstream Port of PCI Express Switch 00: 02 10 79 14 07 04 10 00 00 00 04 06 10 00 01 00 10: 00 00 00 00 00 00 00 00 2c 2d 2d 00 f1 f1 00 00 20: 90 fc a0 fc 01 00 f1 0f 7c 00 00 00 7e 00 00 00 30: 00 00 00 00 50 00 00 00 00 00 00 00 ff 01 12 00 2d:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Navi 23 [Radeon RX 6600/6600 XT/6600M] (rev c7) 00: 02 10 ff 73 07 04 10 00 c7 00 00 03 10 00 80 00 10: 0c 00 00 00 7c 00 00 00 0c 00 00 00 7e 00 00 00 20: 01 f0 00 00 00 00 90 fc 00 00 00 00 43 10 d5 05 30: 00 00 a0 fc 48 00 00 00 00 00 00 00 ff 01 00 00 2d:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Navi 21/23 HDMI/DP Audio Controller 00: 02 10 28 ab 06 04 10 00 00 00 03 04 10 00 80 00 10: 00 00 a2 fc 00 00 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 02 10 28 ab 30: 00 00 00 00 48 00 00 00 00 00 00 00 ff 02 00 00 2e:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe Dummy Function 00: 22 10 8a 14 00 00 10 00 00 00 00 13 10 00 00 00 10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 62 14 56 7c 30: 00 00 00 00 48 00 00 00 00 00 00 00 ff 00 00 00 2f:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc. [AMD] Starship/Matisse Reserved SPP 00: 22 10 85 14 00 00 10 00 00 00 00 13 10 00 80 00 10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 62 14 56 7c 30: 00 00 00 00 48 00 00 00 00 00 00 00 ff 00 00 00 2f:00.1 Encryption controller: Advanced Micro Devices, Inc. [AMD] Starship/Matisse Cryptographic Coprocessor PSPCPP 00: 22 10 86 14 06 04 10 08 00 00 80 10 10 00 80 00 10: 00 00 00 00 00 00 00 00 00 00 70 fc 00 00 00 00 20: 00 00 00 00 00 80 80 fc 00 00 00 00 62 14 56 7c 30: 00 00 00 00 48 00 00 00 00 00 00 00 ff 01 00 00 2f:00.3 USB controller: Advanced Micro Devices, Inc. [AMD] Matisse USB 3.0 Host Controller 00: 22 10 9c 14 07 04 10 00 00 30 03 0c 10 00 80 00 10: 04 00 60 fc 00 00 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 62 14 56 7c 30: 00 00 00 00 48 00 00 00 00 00 00 00 ff 03 00 00 2f:00.4 Audio device: Advanced Micro Devices, Inc. [AMD] Starship/Matisse HD Audio Controller 00: 22 10 87 14 06 04 10 00 00 00 03 04 10 00 80 00 10: 00 00 80 fc 00 00 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 62 14 56 ec 30: 00 00 00 00 48 00 00 00 00 00 00 00 ff 04 00 00 31:00.0 SATA controller: Advanced Micro Devices, Inc. [AMD] FCH SATA Controller [AHCI mode] (rev 51) 00: 22 10 01 79 07 04 10 00 51 01 06 01 10 00 00 00 10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 f0 fc 00 00 00 00 62 14 56 7c 30: 00 00 00 00 48 00 00 00 00 00 00 00 ff 01 00 00 Thanks, Sanjay On Fri, Oct 4, 2024 at 8:53 AM Ping-Ke Shih <pkshih@xxxxxxxxxxx> wrote: > > Sanjay Bhattacharya <sanjbh@xxxxxxxxx> wrote: > > > > However, on downgrading the kernel back to 6.10.10.arch1-1, my wifi > > interface seems to be working fine. Can you please help? > > > > We have found early chips have 36-bit DMA interoperability problems with > certain platforms. Could you share your PCI host vid/pid by outputs of > 'lspci -vt' and 'lspci -x' ? > > And, please try patch [1] to see if it can work to you. > > > [1] https://lore.kernel.org/linux-wireless/20240924021633.19861-1-pkshih@xxxxxxxxxxx/ >