https://bugzilla.novell.com/show_bug.cgi?id=307194#c1 --- Comment #1 from Steffen Winterfeldt 2007-09-03 11:04:29 MST --- The problem seems to be after the switch to pm. I've added some debug code (the full code is in the gfxboot package, bincode.asm::switch_to_pm): or al,1 o32 lgdt [cs:pm_gdt] o32 lidt [cs:pm_idt] mov cr0,eax jmp pm_seg.prog_c32:switch_to_pm_20 switch_to_pm_20: bits 32 mov ax,pm_seg.prog_d16 mov ds,ax mov eax,ss and esp,0ffffh shl eax,4 add esp,eax mov ax,pm_seg.4gb_d32 mov ss,ax ; DEBUG START mov ebx,ss mov dx,ss mov esi,ss mov edi,esp mov cr7,eax ; DEBUG END mov es,ax mov fs,ax mov gs,ax 'mov cr7,eax' is an illegal op, which kills the kvm session. Now, the registers it _should_ print are these: ebx 00000008, edx 00000008, esi 00000008, edi 00055e14 but it shows: ebx 00000017, edx 00000014, esi 00003c00, edi 00002004 in other words, completely messed up. It sees that segment register accesses are all wrong (not only ss - others as well). This leads to a wrong esp calculation and kvm normally dies when returning from that function. Note, however, that this happens the *SECOND* time that function is called. It survives the first call, but if only by chance, I can't say. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=307194#c3 peter czanik changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |pczanik@genesi-usa.com --- Comment #3 from peter czanik 2007-09-03 13:12:56 MST --- http://kvm.qumranet.com/kvmwiki/Guest_Support_Status says, that: " OpenSuse 10.2 32/64 kvm-28/29 Intel 64 Crashes, Workaround exists sans gfxmenu, start kvm with -no-acpi -no-kvm for installation " I can't find the explanation right now, but was something like Intel hw virtualisation does not support some instructions used by gfxmenu. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=307194#c5 --- Comment #5 from Steffen Winterfeldt 2007-09-04 03:11:51 MST --- Note this isn't about breaking in real mode but in protected mode. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.