Hi, Everyone, I'm a newer in L4Linux,I get the lastest snapshort and follow the README which builds it successfully, When I execute make qemu in /my_dir/obj/l4/x86 ,it comes up Entry selection , I tested all but "L4Linux-mag-x86" is'nt work successfully. I prebuild the snapshot in Ubuntu 14.04.4 LTS, the following is the ubuntu output message: L4 Bootstrapper Build: #1 Fri Jul 1 02:18:27 PDT 2016, x86-32, 4.8.4 RAM: 0000000000000000 - 000000000009fbff: 639kB RAM: 0000000000100000 - 000000000fffdfff: 261112kB Total RAM: 255MB Scanning /home/zhangxin/Desktop/l4re-snapshot-2016060908/obj/fiasco/ia32/fiasco -serial_esc Scanning /home/zhangxin/Desktop/l4re-snapshot-2016060908/obj/l4/x86/bin/x86_586/l4f/sigma0 Scanning /home/zhangxin/Desktop/l4re-snapshot-2016060908/obj/l4/x86/bin/x86_586/l4f/moe rom/l4lx-gfx.cfg need 1424 bytes to copy MBI reserved 1424 bytes at 0x2000 Moving up to 13 modules behind 1100000 moving module 12 { 3013400-33133ff } -> { 3e32000-4131fff } [3145728] moving module 11 { 2b28400-3012aa4 } -> { 3947000-3e316a4 } [5154469] moving module 10 { 2b27400-2b2765e } -> { 3946000-394625e } [607] moving module 09 { 2b26400-2b26737 } -> { 3945000-3945337 } [824] moving module 08 { 24e6400-2b25ab7 } -> { 3305000-39446b7 } [6551224] moving module 07 { 2209400-24e5ebb } -> { 3028000-3304abb } [3001020] moving module 06 { e86400-2208973 } -> { 1ca5000-3027573 } [20456820] moving module 05 { e85400-e8591b } -> { 1ca4000-1ca451b } [1308] moving module 04 { b24400-e846a5 } -> { 1943000-1ca32a5 } [3539622] moving module 03 { 968400-b23b8f } -> { 1787000-194278f } [1816464] moving module 02 { 41e400-967f0a } -> { 123d000-1786b0a } [5544715] moving module 01 { 378400-41dcbf } -> { 1197000-123c8bf } [678080] moving module 00 { 2e1400-378257 } -> { 1100000-1196e57 } [618072] Loading /Desktop/l4re-snapshot-2016060908/obj/fiasco/ia32/fiasco Loading re-snapshot-2016060908/obj/l4/x86/bin/x86_586/l4f/sigma0 Loading /l4re-snapshot-2016060908/obj/l4/x86/bin/x86_586/l4f/moe find kernel info page... found kernel info page at 0x400000 Regions of list 'regions' [ 0, fff] { 1000} Arch BIOS [ 1000, 1fff] { 1000} Kern /Desktop/l4re-snapshot-2016060908/obj/fiasco/ia32/fiasco [ 2000, 258f] { 590} Root mbi_rt [ 9fc00, 9ffff] { 400} Arch BIOS [ f0000, fffff] { 10000} Arch BIOS [ 100000, 10f193] { f194} Sigma0 re-snapshot-2016060908/obj/l4/x86/bin/x86_586/l4f/sigma0 [ 140000, 17c367] { 3c368} Root /l4re-snapshot-2016060908/obj/l4/x86/bin/x86_586/l4f/moe [ 2d0400, 2df43f] { f040} Boot bootstrap [ 300000, 38ffff] { 90000} Kern /Desktop/l4re-snapshot-2016060908/obj/fiasco/ia32/fiasco [ 400000, 49bfff] { 9c000} Kern /Desktop/l4re-snapshot-2016060908/obj/fiasco/ia32/fiasco [ 1787000, 4131fff] { 29ab000} Root Module [ fffe000, fffffff] { 2000} Arch BIOS [ fffc0000, ffffffff] { 40000} Arch BIOS API Version: (87) experimental Sigma0 config ip:001001d4 sp:00000000 Roottask config ip:001401f6 sp:00000000 Starting kernel /Desktop/l4re-snapshot-2016060908/obj/fiasco/ia32/fiasco at 003007c0 Welcome to L4/Fiasco.OC! L4/Fiasco.OC microkernel on ia32 Rev: unknown compiled with gcc 4.8.4 for Intel Pentium [] Build: #1 Fri Jul 1 02:13:30 PDT 2016 Performance-critical config option(s) detected: CONFIG_NDEBUG is off CONFIG_NO_FRAME_PTR is off Superpages: yes Kmem:: cpu page at fffd000 (4096Bytes) ACPI: RSDP[0xf0990] r00 OEM:BOCHS. Allocate cpu_mem @ 0xfdbf9400 FPU0: SSE Local APIC[00]: version=11 max_lvt=5 APIC ESR value before/after enabling: 00000000/00000000 Using the Local APIC timer on vector f8 (Periodic Mode) for scheduling ACPI: FACS phys=fffe000 virt=0x203fe000 ACPI: HW sig=0 SERIAL ESC: allocated IRQ 4 for serial uart Absolute KIP Syscalls using: Sysenter Enable MSI support: chained IRQ mgr @ 0xfdbf9150 SERIAL ESC: allocated IRQ 4 for serial uart Not using serial hack in slow timer handler. CPU[0]: GenuineIntel (6:6:3:0)[00000663] Model: QEMU Virtual CPU version 2.0.0 at 3397MHz 32 KB L1 I Cache (8-way associative, 64 bytes per line) 32 KB L1 D Cache (8-way associative, 64 bytes per line) 2048 KB L2 U Cache (8-way associative, 64 bytes per line) Freeing init code/data: 28672 bytes (7 pages) Calibrating timer loop... done. MDB: use page size: 22 MDB: use page size: 12 SIGMA0: Hello! KIP @ 400000 Found Fiasco: KIP syscalls: yes allocated 4KB for maintenance structures SIGMA0: Dump of all resource maps RAM:------------------------ [4:2000;2fff] [0:3000;9efff] [0:110000;13ffff] [4:140000;17cfff] [0:17d000;3fffff] [0:495000;1786fff] [4:1787000;4131fff] [0:4132000;eb8afff] IOMEM:---------------------- [0:0;fff] [0:9f000;fffff] [0:fffe000;febfffff] [0:fec01000;fedfffff] [0:fee01000;ffffffff] IO PORTS-------------------------- [0:0;fffffff] MOE: Hello world MOE: found 197224 KByte free memory MOE: found RAM from 2000 to eb8b000 MOE: allocated 235 KByte for the page array @0x3000 MOE: virtual user address space [0-bfffffff] MOE: rom name space cap -> [C:103000] BOOTFS: [1787000-1942790] [C:105000] l4re BOOTFS: [1943000-1ca32a6] [C:107000] ned BOOTFS: [1ca4000-1ca451c] [C:109000] l4lx-gfx.cfg BOOTFS: [1ca5000-3027574] [C:10b000] io BOOTFS: [3028000-3304abc] [C:10d000] fb-drv BOOTFS: [3305000-39446b8] [C:10f000] mag BOOTFS: [3945000-3945338] [C:111000] x86-legacy.devs BOOTFS: [3946000-394625f] [C:113000] l4lx-x86.io BOOTFS: [3947000-3e316a5] [C:115000] vmlinuz BOOTFS: [3e32000-4132000] [C:117000] ramdisk-x86.rd MOE: cmdline: /home/zhangxin/Desktop/l4re-snapshot-2016060908/obj/l4/x86/bin/x86_586/l4f/moe rom/l4lx-gfx.cfg MOE: Starting: rom/ned rom/l4lx-gfx.cfg MOE: loading 'rom/ned' Ned says: Hi World! Ned: loading file: 'rom/l4lx-gfx.cfg' io | Io service io | Find root Pointer io | Find root Pointer: f0990 io | ACPI: RSDP 0x00000000000F0990 000014 (v00 BOCHS ) io | ACPI: RSDT 0x000000000FFFFBC1 000034 (v01 BOCHS BXPCRSDT 00000001 BXPC 00000001) io | ACPI: FACP 0x000000000FFFF1C0 000074 (v01 BOCHS BXPCFACP 00000001 BXPC 00000001) io | ACPI: DSDT 0x000000000FFFE040 001180 (v01 BOCHS BXPCDSDT 00000001 BXPC 00000001) io | ACPI: FACS 0x000000000FFFE000 000040 io | ACPI: SSDT 0x000000000FFFF234 0008DD (v01 BOCHS BXPCSSDT 00000001 BXPC 00000001) io | ACPI: APIC 0x000000000FFFFB11 000078 (v01 BOCHS BXPCAPIC 00000001 BXPC 00000001) io | ACPI: HPET 0x000000000FFFFB89 000038 (v01 BOCHS BXPCHPET 00000001 BXPC 00000001) io | io | Initializing Namespace objects: io | Table [DSDT: BXPCDSDT] (id 01) - 144 Objects with 18 Devices, 8 Regions, 52 Methods (6/46/5 Serial/Non/Cvt) io | Table [SSDT: BXPCSSDT] (id 02) - 155 Objects with 32 Devices, 1 Regions, 42 Methods (0/42/0 Serial/Non/Cvt) io | ACPI: 2 ACPI AML tables successfully acquired and loaded io | io | Completing Region/Field/Buffer/Package initialization: io | Initialized 9/9 Regions 2/2 Fields 21/21 Buffers 5/5 Packages (308 nodes) io | evxfevnt-0182 Enable : Transition to ACPI mode successful io | Initializing General Purpose Events (GPEs): io | Initialized GPE 00 to 0F [_GPE] 2 regs on interrupt 0x9 (SCI) io | Initializing Device/Processor/Thermal objects and executing _INI/_STA methods: io | Executed 0 _INI methods requiring 1 _STA executions (examined 53 objects) io | ACPICA-Version:20160318, System in ACPI MODE, 32bit timer io | ACPI Error: Could not enable PowerButton event (20160318/evxfevnt-304) io | ACPI Warning: Could not enable fixed event - PowerButton (2) (20160318/evxface-821) io | ACPI: could not register power-button handler: AE_NO_HARDWARE_RESPONSE io | ACPI: Enabled 16 GPEs in block 00 to 0F io | IRQ [00000000000000-00000000000000 1] none (32bit) (align=0 flags=40201) io | IRQ [00000000000000-00000000000000 1] none (32bit) (align=0 flags=40201) io | Ready. Waiting for request. mag | Hello from MAG fb-drv | Trying execution of ``set VBE mode'' using x86emu fb-drv | Found VESA BIOS version 3.0 fb-drv | OEM SeaBIOS VBE(C) 2011 fb-drv | VBE mode 0x117 successfully set. fb-drv | Framebuffer memory: phys: fc000000 - fc400000 fb-drv | virt: 200000 - 600000 fb-drv | Starting server loop mag | mapped frame buffer at 0x400000 mag | View::Info: mag | flags: 0 mag | size: 1024x768 mag | pos: 0x0 mag | bytes_per_line: 2048 mag | buffer_offset: 0 mag | RGBA(2):5(11):6(5):5(0):0(0) mag | memory 0x400000 - 0x800000 mag | Plugin: Mag_client service started mag | Plugin: Frame-buffer service started mag | L4INPUT native mode activated mag | L4INPUT: !!! W A R N I N G !!! mag | L4INPUT: Please, do not use Fiasco's "-esc" with L4INPUT. mag | L4INPUT: !!! W A R N I N G !!! mag | serio: i8042 AUX port at 0x60,0x64 irq 12 mag | serio: i8042 KBD port at 0x60,0x64 irq 1 mag | input: ImExPS/2 Generic Explorer Mouse on isa0060/serio1 mag | input: AT Translated Set 2 keyboard on isa0060/serio0 mag | connect "ImExPS/2 Generic Explorer Mouse", isa0060/serio1/input0 mag | connect "AT Translated Set 2 keyboard", isa0060/serio0/input0 PH 0 offs=00001000 flags=r-x PH-type=0x1 virt=00100000 evirt=00473000 phys=00100000 ephys=00473000 f_sz=00373000 memsz=00373000 PH 1 offs=00374000 flags=rw- PH-type=0x1 virt=00473000 evirt=00573000 phys=00473000 ephys=00573000 f_sz=00052afe memsz=00100000 PH 2 offs=002b708c flags=--- PH-type=0x4 virt=003b608c evirt=003b60b0 phys=003b608c ephys=003b60b0 f_sz=00000024 memsz=00000024 Starting binary at 0x100000, argc=6 argv=0xafff4f90 *argv=0xb1007ff4 argv0=rom/vmlinuz External resolver is at 0xa80008c0 ======> L4Linux starting... <======== Linux version 4.6.0-l4 (zhangxin@ubuntu) (gcc version 4.8.4 (Ubuntu 4.8.4-2ubuntu1~14.04.3) ) #1 Fri Jul 1 02:34:46 PDT 2016 Binary name: rom/vmlinuz Linux kernel command line (5 args): mem=64M console=tty0 l4x_rd=rom/ramdisk-x86.rd root=1:0 ramdisk_size=4000 CPU mapping (l:p)[1]: 0:0 Image: 00100000 - 00573000 [4556 KiB]. Areas: Text: 00100000 - 003b5a5b [2774kB] RO-Data: 003b7000 - 00473000 [752kB] Data: 00473000 - 0049a500 [157kB] Init: 0049c000 - 004c6000 [168kB] BSS: 004c6000 - 0055d000 [604kB] gs=43 fs=43 Device scan: Device: L4ICU Device: PCI0 Device: pci_l4x[1] IRQ: 0000000b - 0000000b MEM: febc0000 - febdffff PORT: 0000c000 - 0000c03f DMAD: 00000000 - 00000000 Device: pci_l4x[2] PORT: 0000c040 - 0000c04f DMAD: 00000000 - 00000000 PORT: 000001f0 - 000001f7 PORT: 000003f6 - 000003f6 IRQ: 0000000e - 0000000e PORT: 00000170 - 00000177 PORT: 00000376 - 00000376 IRQ: 0000000f - 0000000f Device scan done. l4x_fiasco_gdt_entry_offset = 9 l4lx_thread_create: Created thread 41e (cpu0) (u:b3000e00, v:b3000c00, sp:00475fac) main thread will be 41e section-with-init(-data): Virt: 0x473000 to 0x572fff [1024 KiB] section-with-init(-data): Phys: 0x00298000 to 0x00397fff, [1024 KiB] section-with-init-text: Virt: 0x473000 to 0x572fff [1024 KiB] *error: failed to get physical address for 473000.* Main thread running, waiting... L4x: Memory size: 64MB L4x: Setting superpages for main memory L4x: Adjusted memory start: 00000000 Main memory: Virt: 0x800000 to 0x47fffff [65536 KiB] Main memory: Phys: 0x04400000 to 0x083fffff, [65536 KiB] l4x: vmalloc area: 04800000 - 0c800000 Filling lower ptabs... Done (254 entries). text: Virt: 0x100000 to 0x472fff [3532 KiB] text: Phys: 0x00495000 to 0x00807fff, [3532 KiB] Loading: rom/ramdisk-x86.rd INITRD: Size of RAMdisk is 3072KiB RAMdisk from 0ca1b000 to 0cd1b000 [3072KiB] l4lx_thread_create: Created thread 425 (timer0) (u:b3000a00, v:00000000, sp:004f5fa8) WARNING: Unknown rdmsr: 00000186 at 0x4a4737 WARNING: Unknown rdmsr: 00000187 at 0x4a4737 WARNING: Unknown rdmsr: 000000c2 at 0x4a47f0 WARNING: Unknown wrmsr: 000000c2 at 0x4a480e WARNING: Unknown rdmsr: 000000c2 at 0x4a4814 the qemu out stop here: ​ I find the error,But I have no idea about, can anybody help me ? Thanks in advanced! Best Reagrds！ ryan.zhang