Re: Does spice in xen-4.2.0 support QXL?

Qian Hu <qianhu2011@xxxxxxxxx> · Thu, 22 Nov 2012 15:46:36 +0800

Hi, Fabio 
Thank you for your advice! I have successfully added the patch to xen-4.2.0 and set the parameters as you said.

It works and the client seems to be better than before.

Still, there is a little problem that the screen is upside down when the win7 started, exactly the moment the four colorful blocks appeared.

After that, the client is stable and everything is OK. Have you run into the same problem?

huqian

2012/11/20 Fabio Fantoni <fabio.fantoni@xxxxxxxxxx>

    Il 20/11/2012 09:29, Qian Hu ha
      scritto:

    Hi,

      I have tried your patch with xen-4.2.0, but it shows "patch
        unexpected ends in middle of line" at the end.

      Is there any problem with that?

        I can still compile xen and try to add
        "device_model_args=["-device","qxl-vga"]" in the config file,
        but it didn't work 

      with command "xl". The error message is as below, and the log
        says "RAMBlock "vga.vram" already registered, abort!"

      Did I miss something?

      Thank you!

      ----------------------error message-------------------------

        Parsing config from win7.cfg
        xc: info: VIRTUAL MEMORY ARRANGEMENT:
          Loader:        0000000000100000->000000000019bbc4
          TOTAL:         0000000000000000->0000000038000000
          ENTRY ADDRESS: 0000000000100000
        xc: info: PHYSICAL MEMORY ALLOCATION:
          4KB PAGES: 0x0000000000000200
          2MB PAGES: 0x00000000000001bf
          1GB PAGES: 0x0000000000000000
        libxl: error: libxl_dm.c:1217:device_model_spawn_outcome:
          domain 2 device model: spawn failed (rc=-3)
        libxl: error: libxl_qmp.c:641:libxl__qmp_initialize:
          Connection error: Connection refused
        Daemon running with PID 4468

        2012/11/13 Fabio Fantoni <fabio.fantoni@xxxxxxxxxx>

              Hi, everyone!

              I am doing research on remote connect with Xen. My host is
              Fedora 14 and my

              guest is win7.

              I have installed spice package and now I can connect to my
              guest by spice

              client.

              Now I want to use QXL, but I don't know if it is supported
              by the spice in

              xen-4.2.0.

              Could anyone help me?

              Thank you!

              huqian

            QXL support in xen is planned for 4.3, you can add manually
            the actual patch for add it, see attachment.

            I tried it many times, months ago was working but xorg on
            linux domU not started and on windows domU had blu screen
            refered to qxl driver, recently starting domU with spice and
            qxl caused qemu crash with this error on log:

            (/usr/sbin/xl:3463): Spice-CRITICAL **:
            red_memslots.c:123:get_virt: slot_id 194 too big,
            addr=c2c2c2c2c2c2c2c2

            Some details on one of my latest test: http://lists.xen.org/archives/html/xen-devel/2012-10/msg01820.html

            Already reported 2 times (on xen) but no reply, I not know
            if is xen, qemu and/or spice problem.

            Is now a year I try to have spice with qxlrunning on xen, I
            have done numerous tests and reports, some bugs/changes on
            xen and qemu have been made, but are not yet sufficient to
            have qxl functioning as of kvm:(

            If someone solve this problem can tell me how please?

            Thanks for any reply and sorry for bad english

    "patch unexpected ends in middle of line" at the end is not a
    problem, you can continue to build xen, about xl configuration file
    remove device_model_args, videoram, set vnc=0, qxl=1 and other spice
    parameters you need

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