1. Check the memory size shown in the setup in bios menu or using the smbiosview to see if the size matches the physical ram 2. Enable logs for the Linux kernel 3. Try to boot Linux with the nokaslr to disable randomization 4. Print the the memory map HOB when it is passed from SBL to EDKII to see if it is correct the mentioned is to see if it is a memory issue. If so, it is highly likely that there is a problem with the FSP-M phase. Check if the headers provided are meant for your platform On Thu, May 15, 2025, 2:22 PM Stepan via groups.io wrote: > I activate MULTIPLE_DEBUG_PORT_SUPPORT. This led to a new error (CPU > exception?): > > > XhcClearBiosOwnership: called to clear BIOS ownership > !!!! X64 Exception Type - 06(#UD - Invalid Opcode) CPU Apic ID - 00000000 !!!! > RIP - 000000004BED32C8, CS - 0000000000000038, RFLAGS - 0000000000210202 > RAX - 000000000000002F, RCX - 00000002AF803C18, RDX - 0000000000000000 > RBX - 0000000000000004, RSP - 0000000046D85A08, RBP - 0000000046D85B10 > RSI - 0000000046DAF830, RDI - 0000000046DAF310 > R8 - 0000000000000000, R9 - 00000002AF803C60, R10 - 0000000000000000 > R11 - 0000000000000002, R12 - 0000000046DB73C0, R13 - 0000000000000010 > R14 - 00000002AF803C18, R15 - 0000000046DB72C0 > DS - 0000000000000030, ES - 0000000000000030, FS - 0000000000000030 > GS - 0000000000000030, SS - 0000000000000030 > CR0 - 0000000080010033, CR2 - 0000000000000000, CR3 - 0000000046A01000 > CR4 - 0000000000040668, CR8 - 0000000000000000 > DR0 - 0000000000000000, DR1 - 0000000000000000, DR2 - 0000000000000000 > DR3 - 0000000000000000, DR6 - 00000000FFFF0FF0, DR7 - 0000000000000400 > GDTR - 0000000047FFF000 0000000000000047, LDTR - 0000000000000000 > IDTR - 00000002AF94F018 0000000000000FFF, TR - 0000000000000000 > FXSAVE_STATE - 0000000046D85660 > !!!! Find image based on IP(0x4BED32C8) (No PDB) (ImageBase=0000000047BFA180, EntryPoint=0000000047BFA315) !!!! > > > -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#121345): https://edk2.groups.io/g/devel/message/121345 Mute This Topic: https://groups.io/mt/113106248/7686176 Group Owner: devel+owner@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [rebecca@openfw.io] -=-=-=-=-=-=-=-=-=-=-=-