Manjaro use Grub:
do i just add pcie_acs_override=downstream,multifunction or the whole
pcie_acs_override =
[PCIE] Override missing PCIe ACS support for:
downstream
All downstream ports - full ACS capabilties
multifunction
All multifunction devices - multifunction ACS subset
id:nnnn:nnnn
Specfic device - full ACS capabilities
Specified as vid:did (vendor/device ID) in hexI would replace the quiet string with pcie_acs_override=downstream
The quiet string suppresses the full boot output so you might want to remove, also I would first try with downstream only. Then don’t forget to grub-mkconfig -o /boot/grub/grub.cfg
After you boot from it :
i still get no video output from my 2080 with the vfio kernel 
maybe the kernel block the Nvidia GPU?
Read above, without providing much log there’s no way to help.
Also, I thought you were passing through the AMD card.
yes, i passing through a AMD card but i get no output on my host machine 
that was what i mean with no video output with rtx 2080. my host machine runs with the 2080. if i select the vfio kernel from grub i get no video output on my host system. so i cant get through the logs.
I guess one step at the time, if you have built-in GPU, I would remove the Nvidia GPU entirely, then try to get AMD working. Ones that’s done, I would search for logs for Nvidia issue.
Also, you would really make yourself a favour if you would get off arch based distro to something like pop_OS
the Ryzen 5 2600x does not come with an build in GPU, so i need the Nvidia to use my OS.
mhhh but i really like Manjaro 
i was on linux mint before, but i’m not a huge fan of ubuntu anymore. I also love the Cinnamon DE.
Do you have a laptop you could SSH to your host machine with ? Perhaps it’s booting properly it’s just crapped out on graphics
ah sure! my business notebook. i’ll give it a try
Also, your motherboard MSI B450 TOMAHAWK MAX on the picture does have integrated GPU … Is that not the case? Don’t you have DVI or HDMI port on the back of it ?
the ports only work if you have an APU (CPU + GPU) installed. Otherwise they are useless.
Ah makes sense… Bloody APU magic. Where are the days where display out on motherboard meant integrated GPU
That thing is probably booting but you’re missing kernel modules.
You can possibly get it to boot by adding nomodeset to kernel arguments.
This is most likely cause by manjaro/arch as it’s a type of distro where you’re supposed to do it all by yourself.
PS. You can get cinnamon on pop_OS you know…
You’ll be happy on pop_OS. Manjaro/arch based distros means trouble so you need to be willing to get your hands dirty
# dmesg | grep acs
[ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-linux-vfio root=UUID=5f329a30-abde-41ad-aad2-31fbbf23f21a rw pcie_acs_override=multifunction apparmor=1 security=apparmor udev.log_priority=3 iommu=pt amd_iommu=on kvm_amd.npt=1 video=efifb:off
[ 0.066175] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-linux-vfio root=UUID=5f329a30-abde-41ad-aad2-31fbbf23f21a rw pcie_acs_override=multifunction apparmor=1 security=apparmor udev.log_priority=3 iommu=pt amd_iommu=on kvm_amd.npt=1 video=efifb:off
# cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-linux-vfio root=UUID=5f329a30-abde-41ad-aad2-31fbbf23f21a rw pcie_acs_override=multifunction apparmor=1 security=apparmor udev.log_priority=3 iommu=pt amd_iommu=on kvm_amd.npt=1 video=efifb:off
IOMMU Group 0 00:01.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge [1022:1452]
IOMMU Group 0 00:01.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) PCIe GPP Bridge [1022:1453]
IOMMU Group 0 00:01.3 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) PCIe GPP Bridge [1022:1453]
IOMMU Group 0 01:00.0 Non-Volatile memory controller [0108]: Sandisk Corp WD Black 2018/PC SN720 NVMe SSD [15b7:5002]
IOMMU Group 0 03:00.0 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset USB 3.1 XHCI Controller [1022:43d5] (rev 01)
IOMMU Group 0 03:00.1 SATA controller [0106]: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset SATA Controller [1022:43c8] (rev 01)
IOMMU Group 0 03:00.2 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset PCIe Bridge [1022:43c6] (rev 01)
IOMMU Group 0 20:00.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset PCIe Port [1022:43c7] (rev 01)
IOMMU Group 0 20:01.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset PCIe Port [1022:43c7] (rev 01)
IOMMU Group 0 20:04.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset PCIe Port [1022:43c7] (rev 01)
IOMMU Group 0 22:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 15)
IOMMU Group 0 25:00.0 VGA compatible controller [0300]: NVIDIA Corporation TU104 [GeForce RTX 2080 Rev. A] [10de:1e87] (rev a1)
IOMMU Group 0 25:00.1 Audio device [0403]: NVIDIA Corporation TU104 HD Audio Controller [10de:10f8] (rev a1)
IOMMU Group 0 25:00.2 USB controller [0c03]: NVIDIA Corporation TU104 USB 3.1 Host Controller [10de:1ad8] (rev a1)
IOMMU Group 0 25:00.3 Serial bus controller [0c80]: NVIDIA Corporation TU104 USB Type-C UCSI Controller [10de:1ad9] (rev a1)
IOMMU Group 1 00:02.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge [1022:1452]
IOMMU Group 2 00:03.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge [1022:1452]
IOMMU Group 2 00:03.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) PCIe GPP Bridge [1022:1453]
IOMMU Group 2 26:00.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD/ATI] Navi 10 XL Upstream Port of PCI Express Switch [1002:1478] (rev c1)
IOMMU Group 2 27:00.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD/ATI] Navi 10 XL Downstream Port of PCI Express Switch [1002:1479]
IOMMU Group 2 28:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Navi 10 [Radeon RX 5600 OEM/5600 XT / 5700/5700 XT] [1002:731f] (rev c1)
IOMMU Group 2 28:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] Navi 10 HDMI Audio [1002:ab38]
IOMMU Group 3 00:04.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge [1022:1452]
IOMMU Group 4 00:07.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge [1022:1452]
IOMMU Group 4 00:07.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Internal PCIe GPP Bridge 0 to Bus B [1022:1454]
IOMMU Group 4 29:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc. [AMD] Zeppelin/Raven/Raven2 PCIe Dummy Function [1022:145a]
IOMMU Group 4 29:00.2 Encryption controller [1080]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Platform Security Processor [1022:1456]
IOMMU Group 4 29:00.3 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Zeppelin USB 3.0 Host controller [1022:145f]
IOMMU Group 5 00:08.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge [1022:1452]
IOMMU Group 5 00:08.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Internal PCIe GPP Bridge 0 to Bus B [1022:1454]
IOMMU Group 5 2a:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc. [AMD] Zeppelin/Renoir PCIe Dummy Function [1022:1455]
IOMMU Group 5 2a:00.2 SATA controller [0106]: Advanced Micro Devices, Inc. [AMD] FCH SATA Controller [AHCI mode] [1022:7901] (rev 51)
IOMMU Group 5 2a:00.3 Audio device [0403]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) HD Audio Controller [1022:1457]
IOMMU Group 6 00:14.0 SMBus [0c05]: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller [1022:790b] (rev 59)
IOMMU Group 6 00:14.3 ISA bridge [0601]: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge [1022:790e] (rev 51)
IOMMU Group 7 00:18.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 0 [1022:1460]
IOMMU Group 7 00:18.1 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 1 [1022:1461]
IOMMU Group 7 00:18.2 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 2 [1022:1462]
IOMMU Group 7 00:18.3 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 3 [1022:1463]
IOMMU Group 7 00:18.4 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 4 [1022:1464]
IOMMU Group 7 00:18.5 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 5 [1022:1465]
IOMMU Group 7 00:18.6 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 6 [1022:1466]
IOMMU Group 7 00:18.7 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 7 [1022:1467]
so i’m able to ssh into my system from my laptop
i have no problem to get my hands dirty 
manjaro is much more user-friendly than Arch and that’s why I’ve been using it for years 
so far I had less problems with it than with Ubuntu
Hmm looks like it didnt change much in terms of iommu groups.
And also looks like you have no downstream in your kernel arguments.
pcie_acs_override=downstream,multifunction
oh yes, i tested with only multifunction and did not changed it back!
here is the new output:
# dmesg | grep acs
[ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-linux-vfio root=UUID=5f329a30-abde-41ad-aad2-31fbbf23f21a rw nomodeset pcie_acs_override=downstream,multifunction apparmor=1 security=apparmor udev.log_priority=3 iommu=pt amd_iommu=on kvm_amd.npt=1 video=efifb:off
[ 0.066196] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-linux-vfio root=UUID=5f329a30-abde-41ad-aad2-31fbbf23f21a rw nomodeset pcie_acs_override=downstream,multifunction apparmor=1 security=apparmor udev.log_priority=3 iommu=pt amd_iommu=on kvm_amd.npt=1 video=efifb:off
# cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-linux-vfio root=UUID=5f329a30-abde-41ad-aad2-31fbbf23f21a rw nomodeset pcie_acs_override=downstream,multifunction apparmor=1 security=apparmor udev.log_priority=3 iommu=pt amd_iommu=on kvm_amd.npt=1 video=efifb:off
IOMMU Group 0 00:01.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge [1022:1452]
IOMMU Group 10 00:08.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Internal PCIe GPP Bridge 0 to Bus B [1022:1454]
IOMMU Group 11 00:14.0 SMBus [0c05]: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller [1022:790b] (rev 59)
IOMMU Group 11 00:14.3 ISA bridge [0601]: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge [1022:790e] (rev 51)
IOMMU Group 12 00:18.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 0 [1022:1460]
IOMMU Group 12 00:18.1 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 1 [1022:1461]
IOMMU Group 12 00:18.2 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 2 [1022:1462]
IOMMU Group 12 00:18.3 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 3 [1022:1463]
IOMMU Group 12 00:18.4 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 4 [1022:1464]
IOMMU Group 12 00:18.5 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 5 [1022:1465]
IOMMU Group 12 00:18.6 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 6 [1022:1466]
IOMMU Group 12 00:18.7 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 7 [1022:1467]
IOMMU Group 13 01:00.0 Non-Volatile memory controller [0108]: Sandisk Corp WD Black 2018/PC SN720 NVMe SSD [15b7:5002]
IOMMU Group 14 03:00.0 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset USB 3.1 XHCI Controller [1022:43d5] (rev 01)
IOMMU Group 15 03:00.1 SATA controller [0106]: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset SATA Controller [1022:43c8] (rev 01)
IOMMU Group 16 03:00.2 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset PCIe Bridge [1022:43c6] (rev 01)
IOMMU Group 17 20:00.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset PCIe Port [1022:43c7] (rev 01)
IOMMU Group 18 20:01.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset PCIe Port [1022:43c7] (rev 01)
IOMMU Group 19 20:04.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset PCIe Port [1022:43c7] (rev 01)
IOMMU Group 1 00:01.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) PCIe GPP Bridge [1022:1453]
IOMMU Group 20 22:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 15)
IOMMU Group 21 25:00.0 VGA compatible controller [0300]: NVIDIA Corporation TU104 [GeForce RTX 2080 Rev. A] [10de:1e87] (rev a1)
IOMMU Group 22 25:00.1 Audio device [0403]: NVIDIA Corporation TU104 HD Audio Controller [10de:10f8] (rev a1)
IOMMU Group 23 25:00.2 USB controller [0c03]: NVIDIA Corporation TU104 USB 3.1 Host Controller [10de:1ad8] (rev a1)
IOMMU Group 24 25:00.3 Serial bus controller [0c80]: NVIDIA Corporation TU104 USB Type-C UCSI Controller [10de:1ad9] (rev a1)
IOMMU Group 25 26:00.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD/ATI] Navi 10 XL Upstream Port of PCI Express Switch [1002:1478] (rev c1)
IOMMU Group 26 27:00.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD/ATI] Navi 10 XL Downstream Port of PCI Express Switch [1002:1479]
IOMMU Group 27 28:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Navi 10 [Radeon RX 5600 OEM/5600 XT / 5700/5700 XT] [1002:731f] (rev c1)
IOMMU Group 28 28:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] Navi 10 HDMI Audio [1002:ab38]
IOMMU Group 29 29:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc. [AMD] Zeppelin/Raven/Raven2 PCIe Dummy Function [1022:145a]
IOMMU Group 2 00:01.3 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) PCIe GPP Bridge [1022:1453]
IOMMU Group 30 29:00.2 Encryption controller [1080]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Platform Security Processor [1022:1456]
IOMMU Group 31 29:00.3 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Zeppelin USB 3.0 Host controller [1022:145f]
IOMMU Group 32 2a:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc. [AMD] Zeppelin/Renoir PCIe Dummy Function [1022:1455]
IOMMU Group 33 2a:00.2 SATA controller [0106]: Advanced Micro Devices, Inc. [AMD] FCH SATA Controller [AHCI mode] [1022:7901] (rev 51)
IOMMU Group 34 2a:00.3 Audio device [0403]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) HD Audio Controller [1022:1457]
IOMMU Group 3 00:02.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge [1022:1452]
IOMMU Group 4 00:03.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge [1022:1452]
IOMMU Group 5 00:03.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) PCIe GPP Bridge [1022:1453]
IOMMU Group 6 00:04.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge [1022:1452]
IOMMU Group 7 00:07.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge [1022:1452]
IOMMU Group 8 00:07.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Internal PCIe GPP Bridge 0 to Bus B [1022:1454]
IOMMU Group 9 00:08.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge [1022:1452]
ah the groups looks better!
Great ! now run virsh to boot your VM where you have passed through the AMD card and check if you get an output on that DP
You mean you get an output on your host?
