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Thu, 14 Aug 2025 22:03:40 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: virtualization@FreeBSD.org Subject: [Bug 288873] Windows 11 VM with GPU passthrough hangs on boot when using more than one vCPU Date: Thu, 14 Aug 2025 22:03:40 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: bhyve X-Bugzilla-Version: 14.3-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: hayzam@alchemilla.io X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: virtualization@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter Message-ID: Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="UTF-8" X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated List-Id: Discussion List-Archive: https://lists.freebsd.org/archives/freebsd-virtualization List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: freebsd-virtualization@freebsd.org Sender: owner-freebsd-virtualization@FreeBSD.org MIME-Version: 1.0 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D288873 Bug ID: 288873 Summary: Windows 11 VM with GPU passthrough hangs on boot when using more than one vCPU Product: Base System Version: 14.3-RELEASE Hardware: amd64 OS: Any Status: New Severity: Affects Some People Priority: --- Component: bhyve Assignee: virtualization@FreeBSD.org Reporter: hayzam@alchemilla.io I use this Bhyve command: bhyve \ -c cpus=3D8,sockets=3D1,cores=3D4,threads=3D2 \ -m 11662 \ -S -A -I -u -H -P \ -s 0:0,hostbridge \ -l bootrom,/usr/local/share/uefi-firmware/BHYVE_UEFI.fd,/root/Projects/Sylve/d= ata/vms/102/102_vars.fd \ -s 2:0,xhci,tablet \ -s 1:0,lpc \ -s 3:0,e1000,tap0,mac=3D12:e4:ac:7c:a6:d7 \ -s 10:0,nvme,/dev/zvol/zroot/windows-11 \ -s 11:0,fbuf,tcp=3D0.0.0.0:5908,w=3D1024,h=3D768,password=3Dredacted \ -s 12:0,passthru,1/0/0 \ -s 13:0,passthru,1/0/1 \ 102 This is essentially a Windows 11 VM with two passthrough devices: ppt0@pci0:1:0:0: class=3D0x030000 rev=3D0xa1 hdr=3D0x00 vendor=3D0x1= 0de device=3D0x1c03 subvendor=3D0x19da subdevice=3D0x1438 vendor =3D 'NVIDIA Corporation' device =3D 'GP106 [GeForce GTX 1060 6GB]' class =3D display subclass =3D VGA ppt1@pci0:1:0:1: class=3D0x040300 rev=3D0xa1 hdr=3D0x00 vendor=3D0x1= 0de device=3D0x10f1 subvendor=3D0x19da subdevice=3D0x1438 vendor =3D 'NVIDIA Corporation' device =3D 'GP106 High Definition Audio Controller' class =3D multimedia subclass =3D HDA The VM hangs on boot and does not respond to any input. If I boot with just one core, it works fine but with more than one core, it gets stuck during boot. It should also be noted that this ONLY is a problem= if I have pass through devices, without any it boots fine. --=20 You are receiving this mail because: You are the assignee for the bug.=