[Xen-bugs] [Bug 1365] New: PV-GRUB: virtual framebuffer doesn't work

[bugzilla-daemon@xxxxxxxxxxxxxxxxxxx]

http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1365

           Summary: PV-GRUB: virtual framebuffer doesn't work
           Product: Xen
           Version: unstable
          Platform: x86
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Tools
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: zhigang.x.wang@xxxxxxxxxx
                CC: samuel.thibault@xxxxxxxxxxxxx


Env:

xen-3.3-testing cs 18434 x86
qemu-dm: http://xenbits.xensource.com/git-http/qemu-xen-3.3-testing.git commit
f70e8ad4b0d34278c91c40aca20716fd66c73bba (in-tree qemu doesn't work either)
dom0 kernel: linux-2.6.18-658.18431.el5xen

Problem:

When booting a PV guest using pv-grub with VFB, the qemu-dm process dies when
connecting the vnc console using vncviewer:

# xm create vm.cfg --> guest started successfully, can be accessed by xm
console;
# vncviewer :0 --> failed; the qemu-dm dies.

(vfb = ['type=sdl'] doesn't work either; works fine if no vfb.)

vm.cfg:
=======

kernel = "/usr/lib/xen/boot/pv-grub-x86_32.gz"
extra = "(hd0,0)/grub/menu.lst"
disk = ['file:/share/vm/OVM_EL5U1_X86_PVM_4GB/system.img,hda,w!',
]
memory = '256'
name = 'OVM_EL5U1_X86_PVM_4GB'
builder = 'linux'
on_crash = 'destroy'
on_reboot = 'restart'
serial = 'pty'
uuid = '1fa112c9-7edd-4bff-b22a-1617423789cf'
vcpus = 1
vfb = ['type=vnc,vncunused=1,vnclisten=0.0.0.0']
#vfb = ['type=sdl']
vif = ['mac=00:16:3e:31:d5:4b,bridge=xenbr0,rate=8Mb/s@50ms',
'mac=00:16:3e:52:c4:03,bridge=xenbr0',
]

Logs

/var/log/xen/xend.log:
======================

...
[2008-10-07 15:18:42 14072] DEBUG (DevController:166) Waiting for devices pci.
[2008-10-07 15:18:42 14072] DEBUG (DevController:166) Waiting for devices
ioports.
[2008-10-07 15:18:42 14072] DEBUG (DevController:166) Waiting for devices tap.
[2008-10-07 15:18:42 14072] DEBUG (DevController:166) Waiting for devices vtpm.
[2008-10-07 15:18:42 14072] INFO (XendDomain:1174) Domain OVM_EL5U1_X86_PVM_4GB
(16) unpaused.
[2008-10-07 15:20:36 14072] WARNING (image:472) domain OVM_EL5U1_X86_PVM_4GB:
device model failure: pid 14658: died due to signal 11; see
/var/log/xen/qemu-dm-OVM_EL5U1_X86_PVM_4GB.log

/var/log/xen/qemu-dm-OVM_EL5U1_X86_PVM_4GB.log:
===============================================

domid: 16
Watching /local/domain/0/device-model/16/logdirty/next-active
Watching /local/domain/0/device-model/16/command
xs_read(): vncpasswd get error.
/vm/1fa112c9-7edd-4bff-b22a-1617423789cf/vncpasswd.
char device redirected to /dev/pts/2
/share/tmp/repos/xen-3.3-testing/tools/ioemu/hw/xen_blktap.c:612: Init blktap
pipes
Console: prepared domain, waiting for ringref at /local/domain/16/console or
/local/domain/16/serial/0
FB: Waiting for KBD backend creation
Doing backend watch on /local/domain/0/backend/vkbd/16/0
Console: got watch
Console: failed to find ring-ref/port yet
FB: Waiting for FB backend creation
Doing backend watch on /local/domain/0/backend/vfb/16/0
Console: got watch
Console: failed to find ring-ref/port yet
FB: Waiting for KBD frontend initialization
Doing frontend watch on /local/domain/16/device/vkbd/0
FB: Carry on waiting
Console: got watch
Console: got ring-ref 314983 port 2 limit 1048576
Console: connected to guest frontend
FB: Waiting for FB frontend initialization
Doing frontend watch on /local/domain/16/device/vfb/0
Framebuffer 640x480x32 offset 0 stride 2560
FB: Waiting for KBD frontend connection
Doing frontend watch on /local/domain/16/device/vkbd/0
Xen Framebuffer registered


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