[Xen-users] VNC console only shows black screen on HVM guest running on Xen 4.1 with Ubuntu 12.04 as Dom0

[Lukas Laukamp <contact@xxxxxxxxx>]

Hello all,

I have a problem getting a working VNC console for HVM guests on Xen 
4.1. When I start the DomU with xm create everything is fine the DomU 
runs and in xm list it has the running state but when I try to connect 
to the VNC console to install an operating system (Ubuntu and Debian I 
have tested) the VNC viewer only shows a black screen. So I searched in 
the logs and found a log entry where I think that this is the problem:
xen be: console-0: xen be: console-0: initialise() failed
initialise() failed

It's in the qemu-dm log file of the DomU. I have put all logs (xend, 
xend-debug, xen-hotplugpath and qemu-dm) put into the attachment of this 
mail.
Here also is my actual configuration for the DomU:

kernel  = "/usr/lib/xen-4.1/boot/hvmloader"
builder = "hvm"
memory = 4096
shadow_memory = 16
name = "mailer1"
vif = [
        'type=ioemu, bridge=xenbr0, mac=00:50:56:00:04:25'
      ]
acpi = 1
apic = 1
disk = [
        'phy:/dev/vmdisks/mailer1,hda,w',
        'file:/isos/debian-6.0.5-amd64-netinst.iso,hdc:cdrom,r'
       ]
device_model = '/usr/lib/xen-4.1/bin/qemu-dm'
boot="dc"
sdl=0
vfb = [ 'type=vnc,vnclisten=127.0.0.1,vncunused=1,vncpasswd=sOnlEn3' ]
serial='pty'
usbdevice='tablet'
on_reboot='restart'
on_crash='restart'

And here the output of xm dmesg:

(XEN) Xen version 4.1.2 (Ubuntu 4.1.2-2ubuntu2.1) 
(stefan.bader@xxxxxxxxxxxxx) (gcc version 4.6.3 (Ubuntu/Linaro 
4.6.3-1ubuntu5) ) Mon Jun 18 14:13:52 UTC 2012
(XEN) Bootloader: GRUB 1.99-21ubuntu3.1
(XEN) Command line: placeholder
(XEN) Video information:
(XEN)  VGA is text mode 80x25, font 8x16
(XEN)  VBE/DDC methods: none; EDID transfer time: 0 seconds
(XEN)  EDID info not retrieved because no DDC retrieval method detected
(XEN) Disc information:
(XEN)  Found 0 MBR signatures
(XEN)  Found 3 EDD information structures
(XEN) Xen-e820 RAM map:
(XEN)  0000000000000000 - 000000000009ec00 (usable)
(XEN)  000000000009ec00 - 00000000000a0000 (reserved)
(XEN)  00000000000e0000 - 0000000000100000 (reserved)
(XEN)  0000000000100000 - 00000000bf780000 (usable)
(XEN)  00000000bf780000 - 00000000bf78e000 (ACPI data)
(XEN)  00000000bf78e000 - 00000000bf7d0000 (ACPI NVS)
(XEN)  00000000bf7d0000 - 00000000bf7e0000 (reserved)
(XEN)  00000000bf7ec000 - 00000000c0000000 (reserved)
(XEN)  00000000fee00000 - 00000000fee01000 (reserved)
(XEN)  00000000ffc00000 - 0000000100000000 (reserved)
(XEN)  0000000100000000 - 0000000340000000 (usable)
(XEN) ACPI: RSDP 000FA340, 0014 (r0 ACPIAM)
(XEN) ACPI: RSDT BF780000, 003C (r1 7522MT A7522800 20110819 MSFT       97)
(XEN) ACPI: FACP BF780200, 0084 (r1 7522MT A7522800 20110819 MSFT       97)
(XEN) ACPI: DSDT BF780480, 6D1A (r1  A7522 A7522800      800 INTL 20051117)
(XEN) ACPI: FACS BF78E000, 0040
(XEN) ACPI: APIC BF780390, 00AC (r1 7522MT A7522800 20110819 MSFT       97)
(XEN) ACPI: MCFG BF780440, 003C (r1 7522MT OEMMCFG  20110819 MSFT       97)
(XEN) ACPI: OEMB BF78E040, 007A (r1 7522MT A7522800 20110819 MSFT       97)
(XEN) ACPI: HPET BF78A480, 0038 (r1 7522MT OEMHPET  20110819 MSFT       97)
(XEN) ACPI: SSDT BF790DA0, 0363 (r1 DpgPmm    CpuPm       12 INTL 20051117)
(XEN) System RAM: 12279MB (12573816kB)
(XEN) Domain heap initialised
(XEN) Processor #0 7:10 APIC version 21
(XEN) Processor #2 7:10 APIC version 21
(XEN) Processor #4 7:10 APIC version 21
(XEN) Processor #6 7:10 APIC version 21
(XEN) Processor #1 7:10 APIC version 21
(XEN) Processor #3 7:10 APIC version 21
(XEN) Processor #5 7:10 APIC version 21
(XEN) Processor #7 7:10 APIC version 21
(XEN) IOAPIC[0]: apic_id 8, version 32, address 0xfec00000, GSI 0-23
(XEN) Enabling APIC mode:  Flat.  Using 1 I/O APICs
(XEN) Table is not found!
(XEN) Using scheduler: SMP Credit Scheduler (credit)
(XEN) Detected 3341.758 MHz processor.
(XEN) Initing memory sharing.
(XEN) I/O virtualisation disabled
(XEN) ENABLING IO-APIC IRQs
(XEN)  -> Using new ACK method
(XEN) Platform timer is 14.318MHz HPET
(XEN) Allocated console ring of 16 KiB.
(XEN) VMX: Supported advanced features:
(XEN)  - APIC MMIO access virtualisation
(XEN)  - APIC TPR shadow
(XEN)  - Extended Page Tables (EPT)
(XEN)  - Virtual-Processor Identifiers (VPID)
(XEN)  - Virtual NMI
(XEN)  - MSR direct-access bitmap
(XEN) EPT supports 2MB super page.
(XEN) HVM: ASIDs enabled.
(XEN) HVM: VMX enabled
(XEN) HVM: Hardware Assisted Paging detected.
(XEN) Brought up 8 CPUs
(XEN) *** LOADING DOMAIN 0 ***
(XEN)  Xen  kernel: 64-bit, lsb, compat32
(XEN)  Dom0 kernel: 64-bit, PAE, lsb, paddr 0x1000000 -> 0x205f000
(XEN) PHYSICAL MEMORY ARRANGEMENT:
(XEN)  Dom0 alloc.:   000000032c000000->0000000330000000 (3048830 pages 
to be allocated)
(XEN)  Init. ramdisk: 000000033d7fd000->0000000340000000
(XEN) VIRTUAL MEMORY ARRANGEMENT:
(XEN)  Loaded kernel: ffffffff81000000->ffffffff8205f000
(XEN)  Init. ramdisk: ffffffff8205f000->ffffffff84862000
(XEN)  Phys-Mach map: ffffffff84862000->ffffffff85fd8c08
(XEN)  Start info:    ffffffff85fd9000->ffffffff85fd94b4
(XEN)  Page tables:   ffffffff85fda000->ffffffff8600f000
(XEN)  Boot stack:    ffffffff8600f000->ffffffff86010000
(XEN)  TOTAL:         ffffffff80000000->ffffffff86400000
(XEN)  ENTRY ADDRESS: ffffffff81cfb200
(XEN) Dom0 has maximum 8 VCPUs
(XEN) Scrubbing Free RAM: .done.
(XEN) Xen trace buffers: disabled
(XEN) Std. Loglevel: Errors and warnings
(XEN) Guest Loglevel: Nothing (Rate-limited: Errors and warnings)
(XEN) Xen is relinquishing VGA console.
(XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch 
input to Xen)
(XEN) Freed 220kB init memory.
(XEN) physdev.c:155: dom0: wrong map_pirq type 3

All logs are in the attachment as normal text files. The Dom0 is a 
minimal Ubuntu 12.04 Precise Pangolin and Xen is Version 4.1.2
Would be greate when someone has an idea and can help me. I think that 
the VNC console is not attached correct but I don't understand why. When 
there are questions for other logs or more info please say.
Best Regards

Attachment: qemu-dm-mailer1.log
Description: Text document

Attachment: xend.log
Description: Text document

Attachment: xend-debug.log
Description: Text document

Attachment: xen-hotplug.log
Description: Text document

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