For those who run into this in the future, below is a snippet of my grub.cfg. The params to note at are console, video and xen-pciback.hide.

Note that my console is being redirected to com1 which has a db9 serial adapter hooked up to it.

menuentry 'XCP-ng' {
        search --label --set root root-kdmaps
        multiboot2 /boot/xen.gz com1=115200,8n1 console=com1 dom0_mem=4304M,max:4304M watchdog ucode=scan dom0_max_vcpus=1-16 crashkernel=256M,below=4G cpufreq=xen:ondemand
        module2 /boot/vmlinuz-4.19-xen root=LABEL=root-kdmaps ro nolvm hpet=disable console=tty0 quiet vga=785 splash plymouth.ignore-serial-consoles acpi_enforce_resources=lax video=efifb:off xen-pciback.hide=(0000:01:00.0)(0000:01:00.1)
        module2 /boot/initrd-4.19-xen.img
}
menuentry 'XCP-ng (Serial)' {
        search --label --set root root-kdmaps
        multiboot2 /boot/xen.gz com1=115200,8n1 console=com1,vga dom0_mem=4304M,max:4304M watchdog ucode=scan dom0_max_vcpus=1-16 crashkernel=256M,below=4G cpufreq=xen:ondemand
        module2 /boot/vmlinuz-4.19-xen root=LABEL=root-kdmaps ro nolvm hpet=disable console=tty0 acpi_enforce_resources=lax video=efifb:off xen-pciback.hide=(0000:01:00.0)(0000:01:00.1)
        module2 /boot/initrd-4.19-xen.img
}

@Andrew That's exactly what I wanted to know, thanks!

Can you confirm this process is correct:

/opt/xensource/libexec/xen-cmdline --set-dom0 "video=efifb:off xen-pciback.hide=(0000:02:00.0)(0000:02:00.1)"

In grub.cfg, are we replacing console=vga with console=ttyS0 under the multiboot2 line, or do we only need to simply use:

/opt/xensource/libexec/xen-cmdline --set-dom0 "console=ttyS0"

Do we need to do the same with --set-xen for the command above?

Hey @Andrew, thanks very much for looking that up and providing the suggestions!

Re. option 2: it's possible to just hide the T600 from dom0 and remove the R9 270 from the machine? dom0 won't complain that it's missing a GPU, or take control of the only GPU in the system?

Hey @tjkreidl, this is just a single host.

I have the T600 hidden from dom0 using /opt/xensource/libexec/xen-cmdline --set-dom0 "xen-pciback.hide=(0000:02:00.0)"

The other one (R9 270) is not hidden.

If I remove the R9 270 from the host and leave the T600, even though the T600 is hidden from dom0 it seems to be getting used by dom0.

Is it safe to assume that the PCI device ID for the T600 changes once the R9 270 is removed, which means I need to hide the new ID again?

Hi,

My current setup features two GPUs: one (R9 270) used to display the console, and another (T600) for PCI passthrough to a VM. This setup is working fine but I want to reduce power consumption and optimize PCIe lanes.

I want to remove the one used by dom0 and only retain the one I'm using for my VMs. Is this possible to do? My CPU (e5 2680v3) does not have an iGPU.

@dinhngtu Seems like an issue for this already exists: https://github.com/xcp-ng/xenadmin/issues/260

Added what I wrote above as a comment.

Gnggi created this issue in xcp-ng/xenadmin

open Showing wrong Virtualization state for VMs with Management agent 9.1.100 #260

@olivierlambert thanks for the quick reply!

Management Agent not installed in XCP-ng Center v20.04.1 and 25.4.0

Hi team,

Both versions of XCP-ng Center are returning a Management Agent not installed error under the Used Memory column when using the 9.1 driver (this was also an issue with the previous 9.0 version).

Although, XOA does show that it's installed. Is this a known issue?

XCP-ng Center:

XOA:

VM using XenServer's version, for comparison:
Management agent 9.4.2-178

I've just installed XO via a docker container. Everything seems to be working fine apart from the Stats tab in all areas: VMs, Disks, Host, etc.

Any ideas? Here's a snippet of the error:

vm.stats
{
  "id": "9f55ab32-46b5-06aa-50d5-8fddfaf6fbbf",
  "granularity": "seconds"
}
{
  "code": "INTERNAL_ERROR",
  "params": [
    "(Failure
  \"Expected string, got '{uuid:S(c3708d5e-e0f2-428c-91c4-2279c227d7f4);name_label:S(x);name_description:S(x XenServer);memory_overhead:I(1027997696);allowed_operations:...'\")"
  ],
  "call": {
    "method": "host.get_record",
    "params": [
      {
        "uuid": "c3708d5e-e0f2-428c-91c4-2279c227d7f4",
        "name_label": "x",
        "name_description": "x XenServer",
        "memory_overhead": 1027997696,
        "allowed_operations": [
          "vm_migrate",
          "provision",
          "vm_resume",
          "evacuate",
          "vm_start"
        ],
        "current_operations": {},
        "API_version_major": 2,
        "API_version_minor": 14,
        "API_version_vendor": "XenSource",
        "API_version_vendor_implementation": {},
        "enabled": true,
        "software_version": {
          "product_version": "8.1.0",
          "product_version_text": "8.1",
          "product_version_text_short": "8.1",
          "platform_name": "XCP",
          "platform_version": "3.1.0",
          "product_brand": "XCP-ng",
          "build_number": "release/quebec/master/17",
          "hostname": "localhost",
          "date": "2020-03-30",
          "dbv": "0.0.1",
          "xapi": "1.20",
          "xen": "4.13.0-8.3.xcpng8.1",
          "linux": "4.19.0+1",
          "xencenter_min": "2.14",
          "xencenter_max": "2.14",
          "network_backend": "openvswitch",
          "db_schema": "5.504"
        },
        "other_config": {
          "agent_start_time": "1628621379.",
          "boot_time": "1628621206.",
          "rpm_patch_installation_time": "1576008140.651",
          "iscsi_iqn": "iqn.2017-03.com.example:f64f8112",
          "perfmon": "<config><variable><name value=\"cpu_usage\" /><alarm_trigger_level value=\"0.5\" /><alarm_trigger_period value=\"60\" /><alarm_auto_inhibit_period value=\"3600\" /></variable></config>"
        },
        "capabilities": [
          "xen-3.0-x86_64",
          "xen-3.0-x86_32p",
          "hvm-3.0-x86_32",
          "hvm-3.0-x86_32p",
          "hvm-3.0-x86_64",
          ""
        ],
        "cpu_configuration": {},
        "sched_policy": "credit",
        "supported_bootloaders": [
          "pygrub",
          "eliloader"
        ],
        "resident_VMs": [
          "OpaqueRef:1171ebab-8264-4388-bb54-e5617e3c29c7",
          "OpaqueRef:aaed3665-58c8-46a6-a640-1360f2be3118",
          "OpaqueRef:7eb917a6-51df-4003-adb5-8dd94353e47a",
          "OpaqueRef:fedaf846-9528-9770-a157-5435acd125b4",
          "OpaqueRef:32695424-919e-0ba8-ab20-30bcebdec8be",
          "OpaqueRef:e674d66f-fb37-7cc2-a579-b2de94c9520c",
          "OpaqueRef:6d49dd1a-f5e9-8666-b9ff-e6b2439d756e",
          "OpaqueRef:e4ddd2a4-6e6e-6dd1-d09d-2f14fb7c5d6b",
          "OpaqueRef:15a9de06-2f26-4c5b-b1e2-7060e05537e2",
          "OpaqueRef:8386657b-c543-5f29-8a27-c92a6e2d4949",
          "OpaqueRef:392a81e7-be05-414a-8587-207ef210b7d4",
          "OpaqueRef:5a475ece-5938-4f1f-b07e-8ade99234072",
          "OpaqueRef:64fcb320-2aa6-4f5e-89e4-9ca17c3a8423",
          "OpaqueRef:3cbcb0d6-f342-50a8-7971-4f2aa1d0a13b",
          "OpaqueRef:5219881b-8746-d996-df96-4a8d12c45d96",
          "OpaqueRef:3e642c12-12cb-dfc1-0afb-0cbed73c101b"
        ],
        "logging": {},
        "PIFs": [
          "OpaqueRef:fd67add1-fd85-e7b5-6ea2-af4c0943be46",
          "OpaqueRef:e04c476c-424f-bbbc-5b8c-a66acfa55605",
          "OpaqueRef:c0ec2c66-6515-17b4-89d1-56625308ee26",
          "OpaqueRef:58b9b935-bd15-0882-6786-c5290dc7f12e"
        ],
        "suspend_image_sr": "OpaqueRef:32447ec3-4188-a143-119a-d0ef06b35f85",
        "crash_dump_sr": "OpaqueRef:32447ec3-4188-a143-119a-d0ef06b35f85",
        "crashdumps": [],
        "patches": [],
        "updates": [],
        "PBDs": [
          "OpaqueRef:19910c5f-6876-4423-9120-f0f375fceb49",
          "OpaqueRef:f54564f7-c887-0ebb-a161-444c40198928",
          "OpaqueRef:d8d594d1-f7f0-49d3-a747-0aeda681a9b6",
          "OpaqueRef:9b39afb2-6207-ace7-f9dd-79366bca729b",
          "OpaqueRef:6c7c60d9-2adc-a583-f68b-28760e4b88e6",
          "OpaqueRef:623b3a8c-bc27-4ce4-f415-b8ef00cd1df4",
          "OpaqueRef:536655f3-6132-4848-a3ae-3c5e8488a004",
          "OpaqueRef:2e042743-5c76-8b21-f610-829df777e8d6"
        ],
        "host_CPUs": [
          "OpaqueRef:06b04107-da6f-49d9-8655-95a26c72ed19",
          "OpaqueRef:9adad9b9-a656-4c2b-8652-cdd20e7cca4d",
          "OpaqueRef:ff5375f7-c749-4a03-bc77-6ea1155f292f",
          "OpaqueRef:42e2e9dd-b7cf-46d2-ba13-aaefe2046565",
          "OpaqueRef:17c928dd-253b-4584-ade8-dae07f94c626",
          "OpaqueRef:7f8893ef-34e4-4f8d-8754-d87f27978229",
          "OpaqueRef:931e4ebd-b3f3-41ff-ac10-45ca0e787177",
          "OpaqueRef:f0527c7d-651b-4b56-8fb2-c4652c462abb",
          "OpaqueRef:d6d18319-1ac8-48bf-b6fb-b43ebcb7a2fd",
          "OpaqueRef:8eb45ea6-18db-46b1-beb5-085f336894f8",
          "OpaqueRef:b186eb3e-b642-4604-8892-44cccf816b3e",
          "OpaqueRef:b3989447-e34e-4396-8e04-44a3f8111265",
          "OpaqueRef:a79c2650-1c2a-4562-9b59-d336a3e15000",
          "OpaqueRef:10b84e97-0db7-4deb-bede-29a18676cadb",
          "OpaqueRef:35145435-751f-4cf5-a160-2198d95570fd",
          "OpaqueRef:bce5c04c-ed29-4d46-ada4-8f83d14d0260",
          "OpaqueRef:7134da7d-d585-4ffb-99b8-dc59137cb3b5",
          "OpaqueRef:06c477e5-35df-4341-bd7c-b5abbf90336a",
          "OpaqueRef:e62f212e-5d00-41cd-97fd-8d1216744cfa",
          "OpaqueRef:9423c616-3ec3-456e-8649-6b39284f4f6d",
          "OpaqueRef:1ccf641b-97ad-42fa-ad62-75c66deb6b56",
          "OpaqueRef:5d1464a7-d182-452a-baab-b09de7b31bea",
          "OpaqueRef:f7ec9db1-e93b-4a3d-8cde-7c9b6cae392e",
          "OpaqueRef:c8fa802f-196f-4a88-aaae-a0d9b7c2365b"
        ],
        "cpu_info": {
          "cpu_count": "24",
          "socket_count": "1",
          "vendor": "GenuineIntel",
          "speed": "2504.615",
          "modelname": "Intel(R) Xeon(R) CPU E5-2680 v3 @ 2.50GHz",
          "family": "6",
          "model": "63",
          "stepping": "2",
          "flags": "fpu de tsc msr pae mce cx8 apic sep mca cmov pat clflush acpi mmx fxsr sse sse2 ss ht syscall nx rdtscp lm constant_tsc rep_good nopl nonstop_tsc cpuid pni pclmulqdq monitor est ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm abm cpuid_fault intel_ppin ssbd ibrs ibpb stibp fsgsbase bmi1 avx2 bmi2 erms xsaveopt",
          "features": "7ffefbff-bfebfbff-00000021-2c100800",
          "features_pv": "1fc9cbf5-f6f83203-2991cbf5-00000023-00000001-00000329-00000000-00000000-00001000-8c000400-00000000-00000000-00000000-00000000-00000000",
          "features_hvm": "1fcbfbff-f7fa3223-2d93fbff-00000423-00000001-000007ab-00000000-00000000-00001000-9c000400-00000000-00000000-00000000-00000000-00000000",
          "features_hvm_host": "1fcbfbff-f7fa3223-2d93fbff-00000423-00000001-000007ab-00000000-00000000-00001000-9c000400-00000000-00000000-00000000-00000000-00000000",
          "features_pv_host": "1fc9cbf5-f6f83203-2991cbf5-00000023-00000001-00000329-00000000-00000000-00001000-8c000400-00000000-00000000-00000000-00000000-00000000"
        },
        "hostname": "x",
        "address": "192.168.1.5",
        "metrics": "OpaqueRef:253fc8d6-ddd0-cb0e-a396-56ac7e8a5f49",
        "license_params": {
          "restrict_vswitch_controller": "false",
          "restrict_lab": "false",
          "restrict_stage": "false",
          "restrict_storagelink": "false",
          "restrict_storagelink_site_recovery": "false",
          "restrict_web_selfservice": "false",
          "restrict_web_selfservice_manager": "false",
          "restrict_hotfix_apply": "false",
          "restrict_export_resource_data": "false",
          "restrict_read_caching": "false",
          "restrict_cifs": "false",
          "restrict_health_check": "false",
          "restrict_xcm": "false",
          "restrict_vm_memory_introspection": "false",
          "restrict_batch_hotfix_apply": "false",
          "restrict_management_on_vlan": "false",
          "restrict_ws_proxy": "false",
          "restrict_vlan": "false",
          "restrict_qos": "false",
          "restrict_pool_attached_storage": "false",
          "restrict_netapp": "false",
          "restrict_equalogic": "false",
          "restrict_pooling": "false",
          "enable_xha": "true",
          "restrict_marathon": "false",
          "restrict_email_alerting": "false",
          "restrict_historical_performance": "false",
          "restrict_wlb": "false",
          "restrict_rbac": "false",
          "restrict_dmc": "false",
          "restrict_checkpoint": "false",
          "restrict_cpu_masking": "false",
          "restrict_connection": "false",
          "platform_filter": "false",
          "regular_nag_dialog": "false",
          "restrict_vmpr": "false",
          "restrict_vmss": "false",
          "restrict_intellicache": "false",
          "restrict_gpu": "false",
          "restrict_dr": "false",
          "restrict_vif_locking": "false",
          "restrict_storage_xen_motion": "false",
          "restrict_vgpu": "false",
          "restrict_integrated_gpu_passthrough": "false",
          "restrict_vss": "false",
          "restrict_guest_agent_auto_update": "false",
          "restrict_pci_device_for_auto_update": "false",
          "restrict_xen_motion": "false",
          "restrict_guest_ip_setting": "false",
          "restrict_ad": "false",
          "restrict_ssl_legacy_switch": "false",
          "restrict_nested_virt": "false",
          "restrict_live_patching": "false",
          "restrict_set_vcpus_number_live": "false",
          "restrict_pvs_proxy": "false",
          "restrict_igmp_snooping": "false",
          "restrict_rpu": "false",
          "restrict_pool_size": "false",
          "restrict_cbt": "false",
          "restrict_usb_passthrough": "false",
          "restrict_network_sriov": "false",
          "restrict_corosync": "true",
          "restrict_zstd_export": "false"
        },
        "ha_statefiles": [],
        "ha_network_peers": [],
        "blobs": {},
        "tags": [],
        "external_auth_type": "AD",
        "external_auth_service_name": "x",
        "external_auth_configuration": {
          "domain": "x",
          "user": "x"
        },
        "edition": "xcp-ng",
        "license_server": {
          "address": "localhost",
          "port": "27000"
        },
        "bios_strings": {
          "bios-vendor": "American Megatrends Inc.",
          "bios-version": "3801",
          "system-manufacturer": "ASUS",
          "system-product-name": "All Series",
          "system-version": "System Version",
          "system-serial-number": "System Serial Number",
          "baseboard-manufacturer": "ASUSTeK COMPUTER INC.",
          "baseboard-product-name": "X99-A/USB 3.1",
          "baseboard-version": "Rev 1.xx",
          "baseboard-serial-number": "150342285800254",
          "oem-1": "Xen",
          "oem-2": "MS_VM_CERT/SHA1/bdbeb6e0a816d43fa6d3fe8aaef04c2bad9d3e3d",
          "oem-3": "Default string",
          "oem-4": "Default string",
          "oem-5": "SAMUI",
          "oem-6": "Default string",
          "hp-rombios": ""
        },
        "power_on_mode": "",
        "power_on_config": {},
        "local_cache_sr": "OpaqueRef:32447ec3-4188-a143-119a-d0ef06b35f85",
        "chipset_info": {
          "iommu": "false"
        },
        "PCIs": [
          "OpaqueRef:d4ac8b2b-e2c3-436d-b94b-6d268ccf9239",
          "OpaqueRef:a3e2dd8f-eb0a-6deb-0337-1f6dceee2f8c",
          "OpaqueRef:a1e32462-e988-1b19-de32-39ed67b1f6a5",
          "OpaqueRef:9cd3f3c6-cbd0-4a03-9bc5-a9547802f973",
          "OpaqueRef:6f238d61-cd59-4025-bf8b-e8e2c8ebfe83",
          "OpaqueRef:5f1626fa-2042-4fdb-ab4d-fd60f753bfde",
          "OpaqueRef:55eeb799-d7c1-8074-f62a-b1e6b946db16",
          "OpaqueRef:1bdc4aa3-405f-a3cf-89cf-39b31a1f3c21",
          "OpaqueRef:145e02b5-a2bf-2ee1-9d75-5089039e0179",
          "OpaqueRef:0e4b97c7-911e-4398-938b-0e75e3af1316",
          "OpaqueRef:09259b2b-c7f4-11da-bf0b-8086d756dbb4"
        ],
        "PGPUs": [
          "OpaqueRef:fcdad82c-b279-4f55-a366-38ec59a05d96"
        ],
        "PUSBs": [
          "OpaqueRef:9d0e79c3-52a3-45ed-ace4-cc843f5aa877"
        ],
        "ssl_legacy": true,
        "guest_VCPUs_params": {},
        "display": "enabled",
        "virtual_hardware_platform_versions": [
          0,
          1,
          2
        ],
        "control_domain": "OpaqueRef:3e642c12-12cb-dfc1-0afb-0cbed73c101b",
        "updates_requiring_reboot": [],
        "features": [],
        "iscsi_iqn": "iqn.2017-03.com.example:f64f8112",
        "multipathing": false,
        "uefi_certificates": ""
      }
    ]
  },
  "message": "INTERNAL_ERROR((Failure
  \"Expected string, got '{uuid:S(c3708d5e-e0f2-428c-91c4-2279c227d7f4);name_label:S(x);name_description:S(x XenServer);memory_overhead:I(1027997696);allowed_operations:.....
    at Function.wrap (/home/node/xen-orchestra/packages/xen-api/src/_XapiError.js:16:12)
    at /home/node/xen-orchestra/packages/xen-api/src/transports/json-rpc.js:35:27
    at AsyncResource.runInAsyncScope (async_hooks.js:197:9)
    at cb (/home/node/xen-orchestra/node_modules/bluebird/js/release/util.js:355:42)
    at tryCatcher (/home/node/xen-orchestra/node_modules/bluebird/js/release/util.js:16:23)
    at Promise._settlePromiseFromHandler (/home/node/xen-orchestra/node_modules/bluebird/js/release/promise.js:547:31)
    at Promise._settlePromise (/home/node/xen-orchestra/node_modules/bluebird/js/release/promise.js:604:18)
    at Promise._settlePromise0 (/home/node/xen-orchestra/node_modules/bluebird/js/release/promise.js:649:10)
    at Promise._settlePromises (/home/node/xen-orchestra/node_modules/bluebird/js/release/promise.js:729:18)
    at _drainQueueStep (/home/node/xen-orchestra/node_modules/bluebird/js/release/async.js:93:12)
    at _drainQueue (/home/node/xen-orchestra/node_modules/bluebird/js/release/async.js:86:9)
    at Async._drainQueues (/home/node/xen-orchestra/node_modules/bluebird/js/release/async.js:102:5)
    at Immediate.Async.drainQueues [as _onImmediate] (/home/node/xen-orchestra/node_modules/bluebird/js/release/async.js:15:14)
    at processImmediate (internal/timers.js:464:21)
    at process.topLevelDomainCallback (domain.js:147:15)
    at process.callbackTrampoline (internal/async_hooks.js:129:24)"