Warszawski Hackerspace

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====== Craptrap - the home of virtualized workstations ======

===== Hardware =====

  * FX8350
  * R9 290

===== Software =====
  * Debian
  * Qemu (libvirt KVM)
===== VM's ======

  * **Win10 => winbox.waw.hackerspace.pl (10.8.1.48)**
    * Włączanie/wyłączanie na http://iot.waw.hackerspace.pl (via S3 - suspend to ram)
    * Podłączenie zdalne przez RDP (Microsoft Remote Desktop). Host: ''winbox.waw.hackerspace.pl'', user/password: jak na LDAP
    * Podłączenie bezpośrednie: FYI jest podłączona na stałe klawiatura i mysz bezprzewodowa, przynieś baterie AA
    * Logowanie hasłem z LDAPa (pGina 3.2.4.0 + [[https://d.inf.re/b/9853ce8f9c2461122b01c2f4fc5d9296.reg|config]], staff ma Administratora + patch na drive mapper żeby logowało się kerberosem...)
    * RDP enabled
    * GPU pass-through do karty graficznej
    * USB pass-through => klawiatura + myszka wireless Logitech


====== Issues & Solutions ======

===== Windows 10 =====

==== GPU code 43 ====

Reinstall uninstall and reinstall GPU drivers

==== VM S3 (suspend/sleep) not available ====

Install ''qxldod'' drivers.

==== Slow suspend ====

Disable hibernation: ''powercfg /h off''

==== My IO is too slow ====

[[https://www.nikhef.nl/~dennisvd/lvmcrap.html|Delet LVM snapshots...]]

==== ''virsh dompm{suspend,wakeup}'' does not... ====

Install ''qemu agent'' and ''vioserial'' driver in guest

==== VM crashes when idle for some time ====

Well, disable screen blanking and autosuspend...

==== Audio on PulseAudio ====
[[https://wiki.archlinux.org/index.php/libvirt#PulseAudio]]

  <domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
   [...]
   <qemu:commandline>
     <qemu:env name='QEMU_AUDIO_DRV' value='pa'/>
     <qemu:env name='QEMU_PA_SERVER' value='sound.waw.hackerspace.pl'/>
   </qemu:commandline>
  </domain>

==== Audio stutters ====

Change ''Default Format'' from ''16bit 48kHz'' to ''16bit 44.1kHz'' in emulated sound card properties in guest.

==== Shitty IO performance vol. 2 ====
[[https://forums.servethehome.com/index.php?threads/performance-of-kvm-qemu-disks-on-zfs-volumes.12550/#post-119801]]

==== Everything's shit ====
Enable "HIGH PERFRORMANCE" power profile.

==== GPU crashes after host resume ====
Seems like keeping QXL enabled on VMs with Radeon GPU passed through fixes GPU crashes on host suspend. (VM needs to be suspended first as well)

==== QXL/Spice display does not automatically resize to client window ====
Install spice guest tools:
https://www.spice-space.org/download/windows/spice-guest-tools/spice-guest-tools-latest.exe (https://www.spice-space.org/download.html)

===== FreeBSD =====

==== 11.1 ====

=== Hypervisor configuration ===

  * Network: choose bridged. Bridge name: ''br0''.

=== Hypervisor bug ===

There's a problem with the ''Opteron_G5'' hypervisor, which is set by default.

The solution is to replace ''Opteron_G5'' with ''kvm64'' or ''Opteron_G3''.

Also, there is an open bug report for this issue on [[ https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=213333 | FreeBSD Bugzilla ]].

Fixed in 12.0.

===== Linux Guests with PCIe Passthrough =====
Use UEFI & Q35 platform model. (re https://forum.level1techs.com/t/fedora-28-pci-e-gpu-passthrough-linux-guest/127161/3)

===== MacOS =====
https://github.com/kholia/OSX-KVM + ''wieloryb:/storage/common/S*/O*/*.README''

Works perfectly fine, including GPU passthrough.