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Re: [Xen-devel] Using VGA PT for nVidia, causes weird "*** int 15h funct

To: Tom Rotenberg <tom.rotenberg@xxxxxxxxx>
Subject: Re: [Xen-devel] Using VGA PT for nVidia, causes weird "*** int 15h function AX=5f14, BX=078f not yet supported!" messages to appear in qemu log file
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Tue, 20 Oct 2009 14:48:41 +0100
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Thread-topic: [Xen-devel] Using VGA PT for nVidia, causes weird "*** int 15h function AX=5f14, BX=078f not yet supported!" messages to appear in qemu log file
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I think the vga BIO Shas a debug port it can write to that makes messages
appear in qemu's log. It'll print a warning if an unsupported BIOS call is
attempted (it's not always a problem if a BIOS call isn't supported). The
ACPI hotplug messages are just informational, and come from qemu itself.

 -- Keir

On 20/10/2009 14:35, "Tom Rotenberg" <tom.rotenberg@xxxxxxxxx> wrote:

> They are only during guest boot, and they stop appearing.
> Do u have any idea why they appear? Is it somehow related to the vga BIOS?
> 
> On Tue, Oct 20, 2009 at 3:26 PM, Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
> wrote:
>> On 20/10/2009 13:18, "Tom Rotenberg" <tom.rotenberg@xxxxxxxxx> wrote:
>> 
>>> When i search the problem, i found similar messages in the qemu log
>>> file, of other people which used the nVidia PT. For example:
>>> http://lists.xensource.com/archives/html/xen-devel/2009-09/msg00285.html
>>> http://article.gmane.org/gmane.comp.emulators.xen.devel/70827
>>> 
>>> Does anyone know why these messages appear, and what is the meaning of
>>> them? Does it signal that there is a bug somewhere in the code?
>> 
>> Do they keep coming out, or is it e.g., just during guest boot? I think they
>> are harmless debug messages.
>> 
>>  -- Keir
>> 
>> 
>> 



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