On Fri, Oct 02, 2026 at 01:00:31AM +0000, SlowServers Admin wrote: > Hi bugs@, > > I had a working VMM setup on 7.9. I upgraded to snapshot and this is > what I'm seeing. No VMs are starting now. All are OpenBSD VMs with raw > disk images. > > Oct 2 00:55:41 bragi vmd[45485]: started potato (vm 2) successfully, tty > /dev/ttyp1 > Oct 2 00:55:41 bragi vmd[15401]: decode_prefix: invalid index > Oct 2 00:55:41 bragi vmd[15401]: decode_opcode: invalid index > Oct 2 00:55:41 bragi vmd[15401]: decode_modrm: invalid index > Oct 2 00:55:41 bragi vmd[15401]: decode_modrm: invalid state or null insn > Oct 2 00:55:41 bragi vmd[15401]: insn_decode: error decoding modrm >
1. provide the entire vmd log not just a tiny cut-paste please. 2. provide the exact guest configuration. what openbsd version, what archicture, what kernel version build number, how you started it, vm configuration, etc. 3. when does it fail like this? immediately at boot or sometime later? from the timestamps it looks like immediately. 4. did you make sure you did an fw update to get the latest vmm-firmware after/during sysupgrade? -ml > dmesg: > > bragi# dmesg > OpenBSD 8.0 (GENERIC.MP) #74: Thu Oct 1 17:43:46 MDT 2026 > [email protected]:/usr/src/sys/arch/amd64/compile/GENERIC.MP > real mem = 68701192192 (65518MB) > avail mem = 66588217344 (63503MB) > random: good seed from bootblocks > mpath0 at root > scsibus0 at mpath0: 256 targets > mainbus0 at root > bios0 at mainbus0: SMBIOS rev. 2.6 @ 0x9ac00 (30 entries) > bios0: vendor American Megatrends Inc. version "3.5b" date 03/18/2016 > bios0: Supermicro H8SCM > acpi0 at bios0: ACPI 3.0 > acpi0: sleep states S0 S1 S4 S5 > acpi0: tables DSDT FACP APIC MCFG OEMB HPET SRAT SSDT EINJ BERT ERST HEST > acpi0: wakeup devices PC02(S4) PC03(S4) PC04(S4) PC05(S4) PC06(S4) PC07(S4) > PC09(S4) PC0A(S4) PC0B(S4) PC0C(S4) SBAZ(S4) P0PC(S4) UHC1(S4) UHC2(S4) > UHC3(S4) USB4(S4) [...] > acpitimer0 at acpi0: 3579545 Hz, 24 bits > acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat > cpu0 at mainbus0: apid 0 (boot processor) > cpu0: AMD Opteron(tm) Processor 4162 EE, 1700.07 MHz, 10-08-01, patch 010000d9 > cpu0: cpuid 1 > edx=178bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,HTT> > ecx=802009<SSE3,MWAIT,CX16,POPCNT> > cpu0: cpuid 80000001 > edx=efd3fbff<NXE,MMXX,FFXSR,PAGE1GB,RDTSCP,LONG,3DNOW2,3DNOW> > ecx=837ff<LAHF,CMPLEG,SVM,EAPICSP,AMCR8,ABM,SSE4A,MASSE,3DNOWP,OSVW,IBS,SKINIT,NODEID> > cpu0: cpuid 80000007 edx=1f9<HWPSTATE,ITSC> > cpu0: 64KB 64b/line 2-way D-cache, 64KB 64b/line 2-way I-cache > cpu0: 512KB 64b/line 16-way L2 cache > cpu0: smt 0, core 0, package 0, type P > cpu0: AMD erratum 721 detected and fixed > mtrr: Pentium Pro MTRR support, 8 var ranges, 88 fixed ranges > cpu0: apic clock running at 200MHz > cpu0: mwait min=64, max=64, IBE > cpu1 at mainbus0: apid 1 (application processor) > cpu1: AMD Opteron(tm) Processor 4162 EE, 1700.20 MHz, 10-08-01, patch 010000d9 > cpu1: smt 0, core 1, package 0, type P > cpu2 at mainbus0: apid 2 (application processor) > cpu2: AMD Opteron(tm) Processor 4162 EE, 1700.31 MHz, 10-08-01, patch 010000d9 > cpu2: smt 0, core 2, package 0, type P > cpu3 at mainbus0: apid 3 (application processor) > cpu3: AMD Opteron(tm) Processor 4162 EE, 1700.46 MHz, 10-08-01, patch 010000d9 > cpu3: smt 0, core 3, package 0, type P > cpu4 at mainbus0: apid 4 (application processor) > cpu4: AMD Opteron(tm) Processor 4162 EE, 1700.51 MHz, 10-08-01, patch 010000d9 > cpu4: smt 0, core 4, package 0, type P > cpu5 at mainbus0: apid 5 (application processor) > cpu5: AMD Opteron(tm) Processor 4162 EE, 1700.39 MHz, 10-08-01, patch 010000d9 > cpu5: smt 0, core 5, package 0, type P > ioapic0 at mainbus0: apid 0 pa 0xfec00000, version 21, 24 pins, remapped > ioapic1 at mainbus0: apid 1 pa 0xfec20000, version 21, 32 pins, remapped > acpimcfg0 at acpi0 > acpimcfg0: addr 0xe0000000, bus 0-255 > acpihpet0 at acpi0: 14318180 Hz > acpiprt0 at acpi0: bus 0 (PCI0) > acpiprt1 at acpi0: bus -1 (PC02) > acpiprt2 at acpi0: bus -1 (PC03) > acpiprt3 at acpi0: bus -1 (PC04) > acpiprt4 at acpi0: bus 1 (PC09) > acpiprt5 at acpi0: bus 2 (PC0A) > acpiprt6 at acpi0: bus 3 (P0PC) > acpipci0 at acpi0 PCI0 > acpicmos0 at acpi0 > com0 at acpi0 UAR1 addr 0x3f8/0x8 irq 4: ns16550a, 16 byte fifo > com0: console > com1 at acpi0 UAR2 addr 0x2f8/0x8 irq 3: ns16550a, 16 byte fifo > acpibtn0 at acpi0: PWRB > acpicpu0 at acpi0: C1(@1 halt!), PSS > acpicpu1 at acpi0: C1(@1 halt!), PSS > acpicpu2 at acpi0: C1(@1 halt!), PSS > acpicpu3 at acpi0: C1(@1 halt!), PSS > acpicpu4 at acpi0: C1(@1 halt!), PSS > acpicpu5 at acpi0: C1(@1 halt!), PSS > ipmi at mainbus0 not configured > cpu0: 1700 MHz: speeds: 1700 1500 1300 1100 800 MHz > pci0 at mainbus0 bus 0 > pchb0 at pci0 dev 0 function 0 "ATI SR5650 Host" rev 0x02 > ppb0 at pci0 dev 9 function 0 "ATI SR5690 PCIE" rev 0x00: msi > pci1 at ppb0 bus 1 > em0 at pci1 dev 0 function 0 "Intel 82574L" rev 0x00: msi, address > 00:25:90:13:b6:2c > ppb1 at pci0 dev 10 function 0 "ATI SR5690 PCIE" rev 0x00: msi > pci2 at ppb1 bus 2 > em1 at pci2 dev 0 function 0 "Intel 82574L" rev 0x00: msi, address > 00:25:90:13:b6:2d > ahci0 at pci0 dev 17 function 0 "ATI SBx00 SATA" rev 0x00: apic 0 int 22, > AHCI 1.1 > ahci0: port 0: 3.0Gb/s > scsibus1 at ahci0: 32 targets > sd0 at scsibus1 targ 0 lun 0: <ATA, Samsung SSD 850, EXM0> > naa.5002538c4060f1c2 > sd0: 1953514MB, 512 bytes/sector, 4000797360 sectors, thin > ohci0 at pci0 dev 18 function 0 "ATI SB700 USB" rev 0x00: apic 0 int 16, > version 1.0, legacy support > ohci1 at pci0 dev 18 function 1 "ATI SB700 USB" rev 0x00: apic 0 int 16, > version 1.0, legacy support > ehci0 at pci0 dev 18 function 2 "ATI SB700 USB2" rev 0x00: apic 0 int 17 > usb0 at ehci0: USB revision 2.0 > uhub0 at usb0 configuration 1 interface 0 "ATI EHCI root hub" rev 2.00/1.00 > addr 1 > ohci2 at pci0 dev 19 function 0 "ATI SB700 USB" rev 0x00: apic 0 int 18, > version 1.0, legacy support > ohci3 at pci0 dev 19 function 1 "ATI SB700 USB" rev 0x00: apic 0 int 18, > version 1.0, legacy support > ehci1 at pci0 dev 19 function 2 "ATI SB700 USB2" rev 0x00: apic 0 int 19 > usb1 at ehci1: USB revision 2.0 > uhub1 at usb1 configuration 1 interface 0 "ATI EHCI root hub" rev 2.00/1.00 > addr 1 > piixpm0 at pci0 dev 20 function 0 "ATI SBx00 SMBus" rev 0x3d: SMI > iic0 at piixpm0 > sdtemp0 at iic0 addr 0x18: stts2002 > sdtemp1 at iic0 addr 0x19: stts2002 > sdtemp2 at iic0 addr 0x1a: stts2002 > sdtemp3 at iic0 addr 0x1b: stts2002 > nvt0 at iic0 addr 0x2f: W83795G > spdmem0 at iic0 addr 0x50: 16GB DDR3 SDRAM registered ECC PC3-12800 with > thermal sensor > spdmem1 at iic0 addr 0x51: 16GB DDR3 SDRAM registered ECC PC3-12800 with > thermal sensor > spdmem2 at iic0 addr 0x52: 16GB DDR3 SDRAM registered ECC PC3-12800 with > thermal sensor > spdmem3 at iic0 addr 0x53: 16GB DDR3 SDRAM registered ECC PC3-12800 with > thermal sensor > pcib0 at pci0 dev 20 function 3 "ATI SB700 ISA" rev 0x00 > ppb2 at pci0 dev 20 function 4 "ATI SB600 PCI" rev 0x00 > pci3 at ppb2 bus 3 > vga1 at pci3 dev 4 function 0 "Matrox MGA G200eW" rev 0x0a > wsdisplay at vga1 not configured > ohci4 at pci0 dev 20 function 5 "ATI SB700 USB" rev 0x00: apic 0 int 18, > version 1.0, legacy support > pchb1 at pci0 dev 24 function 0 "AMD 10h HyperTransport" rev 0x00 > pchb2 at pci0 dev 24 function 1 "AMD 10h Address Map" rev 0x00 > pchb3 at pci0 dev 24 function 2 "AMD 10h DRAM Cfg" rev 0x00 > km0 at pci0 dev 24 function 3 "AMD 10h Misc Cfg" rev 0x00 > pchb4 at pci0 dev 24 function 4 "AMD 10h Link Cfg" rev 0x00 > usb2 at ohci0: USB revision 1.0 > uhub2 at usb2 configuration 1 interface 0 "ATI OHCI root hub" rev 1.00/1.00 > addr 1 > usb3 at ohci1: USB revision 1.0 > uhub3 at usb3 configuration 1 interface 0 "ATI OHCI root hub" rev 1.00/1.00 > addr 1 > usb4 at ohci2: USB revision 1.0 > uhub4 at usb4 configuration 1 interface 0 "ATI OHCI root hub" rev 1.00/1.00 > addr 1 > usb5 at ohci3: USB revision 1.0 > uhub5 at usb5 configuration 1 interface 0 "ATI OHCI root hub" rev 1.00/1.00 > addr 1 > isa0 at pcib0 > isadma0 at isa0 > pckbc0 at isa0 port 0x60/5 irq 1 irq 12 > pckbd0 at pckbc0 (kbd slot) > wskbd0 at pckbd0 mux 1 > pcppi0 at isa0 port 0x61 > spkr0 at pcppi0 > wbsio0 at isa0 port 0x2e/2: W83627DHG-P rev 0x73 > wbsio0 port 0xa10/2 not configured > usb6 at ohci4: USB revision 1.0 > uhub6 at usb6 configuration 1 interface 0 "ATI OHCI root hub" rev 1.00/1.00 > addr 1 > vmm0 at mainbus0: SVM/RVI > enable mbufs in high memory > vscsi0 at root > scsibus2 at vscsi0: 256 targets > softraid0 at root > scsibus3 at softraid0: 256 targets > root on sd0a (6d5b2e8e67170612.a) swap on sd0b dump on sd0b > > Please let me know if you need anything more from me. > > Thank you! > > -Slow Servers >
