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Re: [Xen-devel] Xen 4.2.0, VNC connection to Windows domU causes black screen on VNC

On Wed, Oct 3, 2012 at 9:22 AM, Valtteri Kiviniemi
<kiviniemi.valtteri@xxxxxxxxx> wrote:
> Hi,
> Tested with realvnc and tightvnc. Realvnc just closes itself when the
> resolution changes and tightvnc just stays open with the black screen.

Lets first see if this is a problem with Windows 2008 expecting
certain registers in the VGA
emulation and falling flat on its face.

If you launch (with the same guest config - but obviously replace the
ISO), with an
Fedora or Ubuntu LiveCD - does it boot? Do you see the VNC screen
changing resolution
and all that?

> - Valtteri
> 2012/10/3 chris <tknchris@xxxxxxxxx>
>> What vnc client I've seen this on os x
>> On Oct 3, 2012 9:08 AM, "Valtteri Kiviniemi"
>> <kiviniemi.valtteri@xxxxxxxxx> wrote:
>>> Hi,
>>> I am trying to get Windows Server 2008 R2 HVM domU working in Xen 4.2.0.
>>> The domU will start and I can see the boot output to the point when the
>>> .iso-image starts loading and I get the "Windows is loading files" loading
>>> bar in VNC. After the Windows installer has finished loading the necessary
>>> files and starts the installer the resolution will change on the VNC screen
>>> and it goes black. However despite that, I think that the Windows installer
>>> is still starting fine and it probably is responding to keyboard input, I
>>> just cant see anything but black. Qemu-dm log file does not contain any
>>> error messages. I'm using the same config file on different server and it is
>>> working there, and when comparing the qemu-dm log files on this server and
>>> the other server where the windows is working they are pretty much
>>> consistent.
>>> I have tried playing with different settings on domU config, but nothing
>>> makes any difference, the outcome is always the same. Installer starts,
>>> resolution changes and then only black. I'am using rather new hardware, CPU
>>> is the new Intel Ivy-Bridge Core i7-3770 with integrated GPU and motherboard
>>> is Intel DQ77MK with latest bios installed. dom0 kernel is 3.6.0 64bit,
>>> hypervisor is 64bit and Windows is 64bit. The same kernel config and domU
>>> config is working on my older server which is running mid 2008 CPU Intel
>>> Q9950 and motherboard Intel DQ45CB, so I would suspect that this might be
>>> some kind of hardware incompatibility problem?
>>> Any ideas of how to debug this problem? I have enabled all the debuggint
>>> options for Xen and dom0 kernel but I'm not getting any error messages. It
>>> seems that the domU is working as intented but only graphics are missing.
>>> - Valtteri
>>> _______________________________________________
>>> Xen-devel mailing list
>>> Xen-devel@xxxxxxxxxxxxx
>>> http://lists.xen.org/xen-devel
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