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