Virt-Manager guest VM network access with NAT not working

Hey there, so I had virt-manager working perfectly up until yesterday when I reinstalled it because of a dependency relating to spice-gtk (long story). Anyway though, I have at this point reinstalled it many times and followed like 3 or 4 guides across the internet with configurations and setting this up. I unfortunately now, cannot get any network access within the VM although it is set to NAT. For some reason it can't see my networks on my host machine. Was wondering if anyone has any ideas why or how I could troubleshoot and fix this? Thanks.

garuda-inxi
System:    Kernel: 5.16.9-2-cachyos x86_64 bits: 64 compiler: gcc v: 11.1.0
           parameters: BOOT_IMAGE=/@/boot/vmlinuz-linux-cachyos
           root=UUID=95b636ca-42a5-47b4-9b7a-038581af6cdf rw [email protected] quiet splash
           rd.udev.log_priority=3 vt.global_cursor_default=0
           resume=UUID=41193397-191d-45b5-8c2b-405cf71e73b2 loglevel=3
           Desktop: KDE Plasma 5.24.0 tk: Qt 5.15.2 info: latte-dock wm: kwin_wayland vt: 2 dm: SDDM
           Distro: Garuda Linux base: Arch Linux
Machine:   Type: Laptop System: ASUSTeK product: X510UA v: 1.0 serial: <filter>
           Mobo: ASUSTeK model: X510UA v: 1.0 serial: <filter> UEFI: American Megatrends v: X510UA.312
           date: 04/29/2020
Battery:   ID-1: BAT0 charge: 8.0 Wh (28.9%) condition: 27.7/42.1 Wh (65.8%) volts: 11.5 min: 11.5
           model: ASUSTeK ASUS Battery type: Li-ion serial: N/A status: Charging cycles: 435
CPU:       Info: Dual Core model: Intel Core i7-7500U bits: 64 type: MT MCP arch: Amber/Kaby Lake
           note: check family: 6 model-id: 8E (142) stepping: 9 microcode: EC cache: L2: 4 MiB
           flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 23220
           Speed: 3100 MHz min/max: 400/3500 MHz Core speeds (MHz): 1: 3100 2: 3100 3: 3100 4: 3100
           Vulnerabilities: Type: itlb_multihit status: KVM: Split huge pages
           Type: l1tf mitigation: PTE Inversion; VMX: conditional cache flushes, SMT vulnerable
           Type: mds mitigation: Clear CPU buffers; SMT vulnerable
           Type: meltdown mitigation: PTI
           Type: spec_store_bypass mitigation: Speculative Store Bypass disabled via prctl
           Type: spectre_v1 mitigation: usercopy/swapgs barriers and __user pointer sanitization
           Type: spectre_v2
           mitigation: Full generic retpoline, IBPB: conditional, IBRS_FW, STIBP: conditional, RSB filling
           Type: srbds mitigation: Microcode
           Type: tsx_async_abort status: Not affected
Graphics:  Device-1: Intel HD Graphics 620 vendor: ASUSTeK driver: i915 v: kernel bus-ID: 00:02.0
           chip-ID: 8086:5916 class-ID: 0300
           Device-2: IMC Networks VGA UVC WebCam type: USB driver: uvcvideo bus-ID: 1-6:2
           chip-ID: 13d3:5a07 class-ID: 0e02 serial: <filter>
           Display: wayland server: X.Org 1.21.1.4 compositor: kwin_wayland driver: loaded: intel
           unloaded: modesetting alternate: fbdev,vesa display-ID: :1 screens: 1
           Screen-1: 0 s-res: 1920x1080 s-dpi: 96 s-size: 508x286mm (20.0x11.3") s-diag: 583mm (23")
           Monitor-1: XWAYLAND0 res: 1920x1080 hz: 60 dpi: 143 size: 340x190mm (13.4x7.5")
           diag: 389mm (15.3")
           OpenGL: renderer: Mesa Intel HD Graphics 620 (KBL GT2) v: 4.6 Mesa 21.3.5 direct render: Yes
Audio:     Device-1: Intel Sunrise Point-LP HD Audio vendor: ASUSTeK driver: snd_hda_intel v: kernel
           alternate: snd_soc_skl bus-ID: 00:1f.3 chip-ID: 8086:9d71 class-ID: 0403
           Sound Server-1: ALSA v: k5.16.9-2-cachyos running: yes
           Sound Server-2: PulseAudio v: 15.0 running: no
           Sound Server-3: PipeWire v: 0.3.45 running: yes
Network:   Device-1: Intel Wireless 8265 / 8275 driver: iwlwifi v: kernel bus-ID: 02:00.0
           chip-ID: 8086:24fd class-ID: 0280
           IF: wlp2s0 state: up mac: <filter>
           IF-ID-1: virbr0 state: up speed: 10 Mbps duplex: unknown mac: <filter>
           IF-ID-2: vnet1 state: unknown speed: 10 Mbps duplex: full mac: <filter>
Bluetooth: Device-1: Intel Bluetooth wireless interface type: USB driver: btusb v: 0.8 bus-ID: 1-8:3
           chip-ID: 8087:0a2b class-ID: e001
           Report: bt-adapter ID: hci0 rfk-id: 1 state: down bt-service: enabled,running rfk-block:
           hardware: no software: yes address: <filter>
Drives:    Local Storage: total: 704.24 GiB used: 164.25 GiB (23.3%)
           SMART Message: Unable to run smartctl. Root privileges required.
           ID-1: /dev/sda maj-min: 8:0 vendor: Samsung model: SSD 870 EVO 500GB size: 465.76 GiB
           block-size: physical: 512 B logical: 512 B speed: 6.0 Gb/s type: SSD serial: <filter> rev: 1B6Q
           scheme: GPT
           ID-2: /dev/sdb maj-min: 8:16 vendor: Micron model: 1100 MTFDDAV256TBN size: 238.47 GiB
           block-size: physical: 512 B logical: 512 B speed: 6.0 Gb/s type: SSD serial: <filter> rev: A020
           scheme: GPT
Partition: ID-1: / raw-size: 448.4 GiB size: 448.4 GiB (100.00%) used: 164.25 GiB (36.6%) fs: btrfs
           dev: /dev/sda2 maj-min: 8:2
           ID-2: /boot/efi raw-size: 300 MiB size: 299.4 MiB (99.80%) used: 584 KiB (0.2%) fs: vfat
           dev: /dev/sda1 maj-min: 8:1
           ID-3: /home raw-size: 448.4 GiB size: 448.4 GiB (100.00%) used: 164.25 GiB (36.6%) fs: btrfs
           dev: /dev/sda2 maj-min: 8:2
           ID-4: /var/log raw-size: 448.4 GiB size: 448.4 GiB (100.00%) used: 164.25 GiB (36.6%) fs: btrfs
           dev: /dev/sda2 maj-min: 8:2
           ID-5: /var/tmp raw-size: 448.4 GiB size: 448.4 GiB (100.00%) used: 164.25 GiB (36.6%) fs: btrfs
           dev: /dev/sda2 maj-min: 8:2
Swap:      Kernel: swappiness: 133 (default 60) cache-pressure: 100 (default)
           ID-1: swap-1 type: partition size: 17.06 GiB used: 0 KiB (0.0%) priority: -2 dev: /dev/sda3
           maj-min: 8:3
           ID-2: swap-2 type: zram size: 15.52 GiB used: 1.2 MiB (0.0%) priority: 100 dev: /dev/zram0
Sensors:   System Temperatures: cpu: 72.0 C mobo: N/A
           Fan Speeds (RPM): cpu: 4700
Info:      Processes: 252 Uptime: 33m wakeups: 4 Memory: 15.52 GiB used: 11.66 GiB (75.2%) Init: systemd
           v: 250 tool: systemctl Compilers: gcc: 11.1.0 clang: 13.0.1 Packages: pacman: 1551 lib: 388
           Shell: fish v: 3.3.1 running-in: konsole inxi: 3.3.07
Garuda (2.5.4-2):
  System install date:     2022-01-27
  Last full system update: 2022-02-15
  Is partially upgraded:   No
  Relevant software:       NetworkManager
  Windows dual boot:       Probably (Run as root to verify)
  Snapshots:               Snapper
  Failed units:            systemd-sysctl.service

Ha virtualization... I love that. :smiley:

Are you supposed to use PCI Pass-through and pass-through your NIC directly or you have the standard simplier default setup of virt-manager (which doesn't pass-through)?

Was the issue happening right after a Garuda update or you didn't update but you in fact only reinstalled virt-manager?
If you only re-installed it, how did you do it (what command line, used Pamac, Octopi, other)?

I wonder if this type of problem would get a lot more hits (and fixes) on virt-manager's forums but let's see first with the above Qs.

2 Likes

Hey sorry didn't see this as been busy lately. I have no clue why but WiFi is working again. Thanks for the suggestions though I'll keep them in mind if I break anything again.

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