Hello, I added some printf here and there and it seems there is no HPET table in VirtualBox APIC, at least no one can be found in the way we are discovering them.
So, hpet_addr remains uninitialized. This is what I get on the serial console. There seems to be only FACP, APIC and SSDT tables. ------------------------------- ECTMAP: min:613 low:736 high:1227 acpi_apic_init :: called ACPI >= v2.0 acpi_apic_init :: try to get XSDT pointer... acpi_apic_init :: try to get XSDT pointer: ffffffff849b5030 (3) acpi_apic_init :: try to get APIC table pointer... acpi_get_apic2 :: XSDT TABLE: F A C P acpi_get_apic2 :: XSDT TABLE: A P I C acpi_get_apic2 :: XSDT TABLE: S S D T acpi_apic_init :: try to get APIC table pointer: ffffffff849b7240 ACPI: rsdp = 0x3ff0030 rsdt/xsdt = 0xffffffff849b5030 (n = 3) 8 bit APIC ids APIC entry=0xffffffff849b726c end=0xffffffff849b7294 APIC entry=0xffffffff849b726c end=0xffffffff849b7294 APIC entry=0xffffffff849b7276 end=0xffffffff849b7294 APIC entry=0xffffffff849b7280 end=0xffffffff849b7294 APIC entry=0xffffffff849b7288 end=0xffffffff849b7294 CPUS: CPU 0 - APIC ID 0 - addr=0xffffffff849b9000 IOAPICS: IOAPIC 0 - APIC ID 1 - addr=0xffffffff849ba000 IOAPIC version 0x20 IRQ override: pin=0 gsi=2 trigger=EDGE polarity=HIGH IRQ override: pin=9 gsi=9 trigger=LEVEL polarity=LOW IOAPIC 0 configured with GSI 0-23 com 2 out of range RTC time is 2025-08-11 22:36:14 hpet_init :: called ../i386/i386/apic.c:428: hpet_init: Assertion `hpet_addr != 0' failed.panic ../kern/debug.c:103: Debugger: Debugger invoked, but there isn't one! -------------------------------- Cheers, Diego El lun, 11 ago 2025 a las 11:01, Bruno Haible via Bug reports for the GNU Hurd (<bug-hurd@gnu.org>) escribió: > The image from November 2024 > > https://cdimage.debian.org/cdimage/ports/latest/hurd-amd64/debian-hurd-20241115.img.tar.xz > boots fine in VirtualBox (7.0.x on Ubuntu). > > The image from August 2025 > > https://cdimage.debian.org/cdimage/ports/latest/hurd-amd64/debian-hurd-amd64-20250807.img.tar.xz > does not boot in VirtualBox (7.0.x on Ubuntu). > It reboots after some I/O APIC message. > Find attached a screen capture and the log. > > This is with I/O APIC on in the VM's configuration. > If I turn I/O APIC off, it does not even get that far: it hangs during > boot. > > Bruno > >