VM crashes after booting

Hi, i have just installed qemu but i crash when the windows setup starts. I’m following this guide by some ordinary gamers. I’ve given the VM 6/8GB and 8 of my 12 threads. Any help would be appreciated.


Hello @pro0110 :wink:

You can not expect that someone would watch a 45min video just for explanation. Summarize step by step what you have done.


this is what ive done from my basic understanding

enabled iommu
installed qemu libvirt edk2-ovmf virt-manager ebtables dnsmasq packages
enabled and started libvirtd.service and virtlogd.socket
started default network

vm settings:
chipset q35
firmware UEFI x86_64: /usr/share/edk2-ovmf/x64/OVMF_CODE.fd
cpu 1 socket, 4 cores, 2 threads
ram 6gb
enabled cd rom boot
no other settings were changed

after booting the vm, whole pc crashes

1 Like

Have a look at this guide:

And then please post your system information. Thanks.

    ~  sudo inxi --admin --verbosity=7 --filter --no-host --width                                                                                                                                                                   ✔ 
[sudo] password for billly: 
  Kernel: 5.13.13-1-MANJARO x86_64 bits: 64 compiler: gcc v: 11.1.0 
  parameters: BOOT_IMAGE=/boot/vmlinuz-5.13-x86_64 
  root=UUID=08285496-6e64-4925-bc1c-fc6dab36d749 rw quiet 
  root=/dev/mapper/luks-2f4041b2-f195-4632-b980-5dcd032197df apparmor=1 
  security=apparmor amd_iommu=on udev.log_priority=3 
  Console: tty pts/2 wm: kwin_x11 DM: SDDM Distro: Manjaro Linux 
  base: Arch Linux 
  Type: Desktop Mobo: ASUSTeK model: ROG STRIX B450-F GAMING v: Rev 1.xx 
  serial: <filter> UEFI: American Megatrends v: 4007 date: 12/08/2020 
  Message: No system battery data found. Is one present? 
  RAM: total: 7.69 GiB used: 1.86 GiB (24.1%) 
  Array-1: capacity: 128 GiB slots: 4 EC: None max-module-size: 32 GiB 
  note: est. 
  Device-1: DIMM_A1 size: 8 GiB speed: 2133 MT/s type: DDR4 
  detail: synchronous unbuffered (unregistered) bus-width: 64 bits 
  total: 64 bits manufacturer: Crucial Technology 
  part-no: CT8G4DFD8213.C16FBR2 serial: <filter> 
  Device-2: DIMM_A2 size: No Module Installed 
  Device-3: DIMM_B1 size: No Module Installed 
  Device-4: DIMM_B2 size: No Module Installed 
  Info: 6-Core model: AMD Ryzen 5 2600X socket: AM4 bits: 64 type: MT MCP 
  arch: Zen+ family: 17 (23) model-id: 8 stepping: 2 microcode: 800820D cache: 
  L1: 576 KiB L2: 3 MiB L3: 16 MiB bogomips: 93460 
  Speed: 3868 MHz min/max: 2200/3900 MHz base/boost: 3900/4250 boost: disabled 
  volts: 1.2 V ext-clock: 100 MHz Core speeds (MHz): 1: 3868 2: 1947 3: 2195 
  4: 2194 5: 1954 6: 2194 7: 2196 8: 2195 9: 3874 10: 1947 11: 1947 12: 2195 
  Flags: 3dnowprefetch abm adx aes aperfmperf apic arat avic avx avx2 bmi1 
  bmi2 bpext clflush clflushopt clzero cmov cmp_legacy constant_tsc cpb cpuid 
  cr8_legacy cx16 cx8 de decodeassists extapic extd_apicid f16c flushbyasid 
  fma fpu fsgsbase fxsr fxsr_opt ht hw_pstate ibpb irperf lahf_lm lbrv lm mca 
  mce misalignsse mmx mmxext monitor movbe msr mtrr mwaitx nonstop_tsc nopl 
  npt nrip_save nx osvw overflow_recov pae pat pausefilter pclmulqdq pdpe1gb 
  perfctr_core perfctr_llc perfctr_nb pfthreshold pge pni popcnt pse pse36 
  rdrand rdseed rdtscp rep_good sep sev sev_es sha_ni skinit smap smca sme 
  smep ssbd sse sse2 sse4_1 sse4_2 sse4a ssse3 succor svm svm_lock syscall tce 
  topoext tsc tsc_scale v_vmsave_vmload vgif vmcb_clean vme vmmcall wdt 
  xgetbv1 xsave xsavec xsaveerptr xsaveopt xsaves 
  Vulnerabilities: Type: itlb_multihit status: Not affected 
  Type: l1tf status: Not affected 
  Type: mds status: Not affected 
  Type: meltdown status: Not affected 
  Type: spec_store_bypass 
  mitigation: Speculative Store Bypass disabled via prctl and seccomp 
  Type: spectre_v1 
  mitigation: usercopy/swapgs barriers and __user pointer sanitization 
  Type: spectre_v2 mitigation: Full AMD retpoline, IBPB: conditional, STIBP: 
  disabled, RSB filling 
  Type: srbds status: Not affected 
  Type: tsx_async_abort status: Not affected 
  Device-1: NVIDIA GP107 [GeForce GTX 1050] vendor: ASUSTeK driver: nouveau 
  v: kernel bus-ID: 08:00.0 chip-ID: 10de:1c81 class-ID: 0300 
  Display: server: X.Org 1.20.13 compositor: kwin_x11 driver: 
  loaded: modesetting alternate: fbdev,vesa display-ID: :0 screens: 1 
  Screen-1: 0 s-res: 1920x1080 s-dpi: 96 s-size: 508x285mm (20.0x11.2") 
  s-diag: 582mm (22.9") 
  Monitor-1: HDMI-1 res: 1920x1080 hz: 60 dpi: 38 
  size: 1280x720mm (50.4x28.3") diag: 1469mm (57.8") 
  OpenGL: renderer: NV137 v: 4.3 Mesa 21.2.1 direct render: Yes 
  Device-1: NVIDIA GP107GL High Definition Audio vendor: ASUSTeK 
  driver: snd_hda_intel v: kernel bus-ID: 08:00.1 chip-ID: 10de:0fb9 
  class-ID: 0403 
  Device-2: AMD Family 17h HD Audio vendor: ASUSTeK driver: snd_hda_intel 
  v: kernel bus-ID: 0a:00.3 chip-ID: 1022:1457 class-ID: 0403 
  Sound Server-1: ALSA v: k5.13.13-1-MANJARO running: yes 
  Sound Server-2: JACK v: 1.9.19 running: no 
  Sound Server-3: PulseAudio v: 15.0 running: yes 
  Sound Server-4: PipeWire v: 0.3.34 running: yes 
  Device-1: Intel I211 Gigabit Network vendor: ASUSTeK driver: igb v: kernel 
  port: d000 bus-ID: 03:00.0 chip-ID: 8086:1539 class-ID: 0200 
  IF: enp3s0 state: down mac: <filter> 
  Device-2: Realtek RTL8192EE PCIe Wireless Network Adapter driver: rtl8192ee 
  v: kernel port: c000 bus-ID: 07:00.0 chip-ID: 10ec:818b class-ID: 0280 
  IF: wlp7s0 state: up mac: <filter> 
  IP v4: <filter> type: dynamic noprefixroute scope: global 
  broadcast: <filter> 
  IP v6: <filter> type: dynamic noprefixroute scope: global 
  IP v6: <filter> type: noprefixroute scope: link 
  IF-ID-1: virbr0 state: down mac: <filter> 
  IP v4: <filter> scope: global broadcast: <filter> 
  WAN IP: <filter> 
  Message: No bluetooth data found. 
  Message: No logical block device data found. 
  Device-1: luks-2f4041b2-f195-4632-b980-5dcd032197df maj-min: 254:0 
  type: LUKS dm: dm-0 size: 232.59 GiB 
  p-1: sda2 maj-min: 8:2 size: 232.59 GiB 
  Message: No RAID data found. 
  Local Storage: total: 232.89 GiB used: 55.61 GiB (23.9%) 
  ID-1: /dev/sda maj-min: 8:0 vendor: Western Digital 
  model: WD2500BVVT-28A26Y1 size: 232.89 GiB block-size: physical: 512 B 
  logical: 512 B sata: 2.6 speed: 3.0 Gb/s type: HDD rpm: 5400 
  serial: <filter> rev: 1A01 temp: 34 C scheme: GPT 
  SMART: yes state: enabled health: PASSED on: 249d 5h cycles: 2634 
  Message: No optical or floppy data found. 
  ID-1: / raw-size: 232.59 GiB size: 227.88 GiB (97.98%) 
  used: 55.61 GiB (24.4%) fs: ext4 block-size: 4096 B dev: /dev/dm-0 
  maj-min: 254:0 mapped: luks-2f4041b2-f195-4632-b980-5dcd032197df label: N/A 
  uuid: 08285496-6e64-4925-bc1c-fc6dab36d749 
  ID-2: /boot/efi raw-size: 300 MiB size: 299.4 MiB (99.80%) 
  used: 440 KiB (0.1%) fs: vfat block-size: 512 B dev: /dev/sda1 maj-min: 8:1 
  label: NO_LABEL uuid: D942-C738 
  Alert: No swap data was found. 
  Message: No unmounted partitions found. 
  Hub-1: 1-0:1 info: Full speed (or root) Hub ports: 10 rev: 2.0 
  speed: 480 Mb/s chip-ID: 1d6b:0002 class-ID: 0900 
  Device-1: 1-1:2 info: Microdia USB DEVICE type: Keyboard,Mouse 
  driver: hid-generic,usbhid interfaces: 2 rev: 2.0 speed: 12 Mb/s 
  power: 400mA chip-ID: 0c45:6656 class-ID: 0301 
  Device-2: 1-5:3 info: Winbond ADXMK0419 type: Keyboard,Mouse 
  driver: hid-generic,usbhid interfaces: 2 rev: 1.1 speed: 12 Mb/s 
  power: 400mA chip-ID: 0416:a0f8 class-ID: 0301 serial: <filter> 
  Hub-2: 2-0:1 info: Full speed (or root) Hub ports: 4 rev: 3.1 speed: 10 Gb/s 
  chip-ID: 1d6b:0003 class-ID: 0900 
  Hub-3: 3-0:1 info: Full speed (or root) Hub ports: 4 rev: 2.0 
  speed: 480 Mb/s chip-ID: 1d6b:0002 class-ID: 0900 
  Hub-4: 4-0:1 info: Full speed (or root) Hub ports: 4 rev: 3.0 speed: 5 Gb/s 
  chip-ID: 1d6b:0003 class-ID: 0900 
  System Temperatures: cpu: 36.5 C mobo: N/A gpu: nouveau temp: 34.0 C 
  Fan Speeds (RPM): N/A gpu: nouveau fan: 973 
  Processes: 316 Uptime: 6m wakeups: 0 Init: systemd v: 248 tool: systemctl 
  Compilers: gcc: 11.1.0 Packages: pacman: 1262 lib: 340 flatpak: 0 
  Shell: Zsh (sudo) v: 5.8 default: Bash v: 5.1.8 running-in: konsole 
  inxi: 3.3.06

You cannot passthrough a GPU which is in use. You need one GPU for Xorg and a second GPU for the VM. Only GPUs which can be used for xorg and multiple VMs are modern Intel GPUs.

im not even on the gpu pass through part, i havent even installed my os yet

Ah ok sorry…

So you gave it 6Gigs of your 8Gig memory and did not even consider to have swapfile/partition:

I guess it did not crash, but rather freeze because the host have less memory available and cannot swap.

alright, ill try with maybe 3gb instead and let u know
also i have no clue how to make swap

Also Luks encryption needs memory for decryption and will slow down the whole process.

seems to be working now, thanks!

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