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Hi Fabio Fantoni,

Thank you for your reply.

It is really weird.

I compiled both qemu binary ( qemu-upstream in xen and qemu-2.0 from qemu.org website) in the same environment, the binary in xen has the problem while

the other one works well.

I will check whether wheezy backport has libspice-server-dev and libspice-protocol-dev and try again.

Best Regards

From: Fabio Fantoni

Date: 2014-07-14 15:59

To: kevin.zhang@xxxxxxxxxxx; xen-devel

Subject: Re: [Xen-devel] QXL problem: Xen 4.4.1 rc1 and xen 4.5 unstable

Il 14/07/2014 07:29, kevin.zhang@xxxxxxxxxxx ha scritto:

Hi Fabio Fantoni,



     Today, I've done another test on xenbits xen 4.5 unstable.

     This time, I directly compiled xen on my test server, and use default libspice-server-dev and libspice-protocol-dev header files for spice option.



root@debian:~# apt-cache policy libspice-server-dev libspice-protocol-dev

libspice-server-dev:

Installed: 0.11.0-1+deb7u1

Candidate: 0.11.0-1+deb7u1

Version table:

*** 0.11.0-1+deb7u1 0

        500 http://cdn.debian.net/debian/ wheezy/main amd64 Packages

        100 /var/lib/dpkg/status

libspice-protocol-dev:

Installed: 0.10.1-1

Candidate: 0.10.1-1

Version table:

*** 0.10.1-1 0

        500 http://cdn.debian.net/debian/ wheezy/main amd64 Packages

        100 /var/lib/dpkg/status

     I also download qemu-2.0 source code from qemu.org, and compiled it by the way mentioned in http://wiki.xen.org/wiki/QEMU_Upstream.

     Then I create win7 hvm with qemu-xen and /usr/local/bin/qemu-system-i386 respectively.

     The result shows that:

      1 . qemu-upstream used in xen 4.5 unstable still exited when changing screen resolution,

      2. my self-compiled qemu2.0 behave normally.

     I think maybe there's still some differences between the two qemu repository.

Use spice from backports or recompile the latest from Sid, wheezy packages are too old for newer qemu.
xen already download and compile qemu upstream automatically if you not specify binary in repository.
I also use use wheezy dom0 with same xen and qemu and same domU and spice guest tools installed automatically resize the windows resolution without problem (except rare cases when I connect remote-viewer before windows start).
Below also reply to other mail.

I'm actively waiting for your advice and willing to do the following debug.

vm config file is as follow:

name='Win7'

builder="hvm"

memory=2048

vcpus=2

vif=['bridge=br0']

disk=['/srv/vm_templates/1.qcow2,qcow2,hda,rw',',raw,hdb,ro,cdrom']

boot='dc'

device_model_version="qemu-xen"

#device_model_override="/usr/lib/xen/bin/qemu-gdb"

#device_model_override="/usr/local/bin/qemu-system-i386"

viridian=1

vnc=1

vnclisten="0.0.0.0"

vga="qxl"

spice=1

spicehost='0.0.0.0'

spiceport=6000

spicedisable_ticketing=1

spicevdagent=1

spice_clipboard_sharing=1

spiceusbredirection=4

soundhw="hda"

localtime=1

videoram=128

videoram=128 is not needed with qxl as already the default.
Try to disable vnc when you use spice, even if I used with also vnc many times without problem time ago.

Best Regards

From: kevin.zhang@xxxxxxxxxxx

Date: 2014-07-14 10:26

To: Fabio Fantoni; xen-devel

Subject: Re: [Xen-devel] QXL problem: Xen 4.4.1 rc1 and xen 4.5 unstable

Hi Fabio Fantoni,

Thank you for your help.

If I use your method to run qemu-gdb when using xl create, xl will complain startup timeout.

I know, I already posted the solution but I try to explain better.

# after xl create with (qemu gdb), do it fast after xl create when arrive on qemu process launch (before timeout or xl create will fails)
target remote localhost:1234 # prepare this command in other ssh to the xen dom0 and enter on xl create when arrive on qemu launch
c # press immediatly
bt full # when qemu stops

Sorry for my bad english.

    Perhaps I did not describe my problem clearly enough, I can successfully create windows HVM, my problem happened when I change windows screen resolution.

The qemu process suddenly exited while xl list can still list the domU information.

    I am using debian wheezy 7.5 amd 64, I am using fantu's xen 4.5 unstable and the qemu-xen-remote in his code repository,

root@debian:~# /usr/lib/xen/bin/qemu-system-i386 -version

QEMU emulator version 2.0.0, Copyright (c) 2003-2008 Fabrice Bellard

And I compiled Xen from fantu's xen repository in compilation server, then use install.sh in dist dir to install xen packages in my test server.

My compilation server has spice 0.12.4 compiled and installed.

My test server has debian wheezy backport qemu installed with spice-server:

dpkg -l |grep spice

ii libspice-server1:amd64             0.12.4-0nocelt2~bpo70+1

Then how can I obtain useful debug information after qemu exit with vm running?

Best Regards

From: Fabio Fantoni

Date: 2014-07-11 18:06

To: kevin.zhang@xxxxxxxxxxx; xen-devel

Subject: Re: [Xen-devel] QXL problem: Xen 4.4.1 rc1 and xen 4.5 unstable

Il 11/07/2014 04:38, kevin.zhang@xxxxxxxxxxx ha scritto:

Hi all,

Firstly please forgive me if I put this problem in the wrong mail list.

However, it seems that xen-users mail list cannot resolve this QXL problems. Therefore, I have to post QXL problem in devel mail list.

My problem is as follow:

I'm testing QXL for windows HVM, spice works well with stdvga.

However, when I switch to QXL, qemu exit abnormally:

I specify vga="qxl" and videoram=128, using qemu-xen. The windows 7 boots and automatially switch resolution for me in virt-viewer.

While display and sound transfering very well, if I change display resolution, the virt-viewer will be suddenly closed and

I check the physical server, the qemu process disappear simultaneously.

Then I switch to wheezy backport qemu 2.0 as device model, the qemu process will exit as soon as the welcome page appears and at the beginning of resolution change.

I tested and found the same bug on both xenbits xen 4.4.1 rc1 and Fantu's Xen 4.5 unstable, this problem exists in both branches.

Is it a known issue or is there any solution for this bug?

Thank you very much!

Thanks for testing spice and qxl and report issue.
I have spice + qxl working as kvm on xen unstable except this problem:
http://lists.xen.org/archives/html/xen-devel/2014-07/msg01021.html

Please post details on your dom0 installation and domU (for example xl cfg,
spice guest tools version ecc...)
About qemu crash try to take a full backtrace with gdb and post it here.

Small help with gdb of qemu launched by xl:

Add the line below in domU's xl cfg:
device_model_override="/usr/lib/xen/bin/qemu-gdb"

vi /usr/lib/xen/bin/qemu-gdb # create the file, change the qemu path if
needed
#!/bin/sh
exec gdbserver 0.0.0.0:1234 /usr/lib/xen/bin/qemu-system-i386 "$@"

# after xl create, do it fast (before timeout or xl create will fails)
target remote localhost:1234
c
bt full # when qemu stops

You should install also all needed dbg packages before, spice qemu ecc or
without package should be compiled with debug enabled (for xen and qemu
default in unstable).

The latest qemu crash with spice I saw was in 2.0-rc solved before 2.0.0
final, your qemu is at least 2.0.0 final?
http://git.qemu.org/?p=qemu.git;a=commit;h=dc491cfc14074064ed54a872b62cce6ca1330644

Kevin

Best Regards,