Re: [Xen-devel] Experimental results for VGA passthrough

["Beng Heng, Ng" <bengheng@xxxxxxxxxxxxxx>]

Apologies, I missed your earlier point about the FLR. I'll try that out.
Thanks.

- Beng Heng

Beng Heng, Ng wrote:
> Hi Jean,
> 
> For the linux guest, I tested using Ubuntu 64-bit. It doesn't seem to
> work well, and hangs shortly after boot-up. I've attached a short clip
> and hopefully that can explain my observations better. I've also
> attached logs from the serial terminal and Qemu. I'd like to bring your
> attention to the last lines of the Qemu log, which warns that the guest
> is trying to write to unused BAR.
> 
> On the other hand, things are much smoother with Vista 64-bit. I have
> tried no less than three times, and all went smoothly. Even the
> resolution, color and Aero feature are equivalent to native. The only
> minor issue is that after shutdown, the screen becomes blank. But I
> suppose this is better than XP which was "stuck" in the shutdown screen.
> I have the logs and clip for Vista as well. As the clip is bigger, I'll
> only send it to you if you want.
> 
> Please let me know if there's any comments or suggestions which you'd
> like me to try out. Thanks and have a great weekend.
> 
> Warmest Regards,
> Beng Heng
> 
> Jean Guyader wrote:
>> Could you tell me if it works with a Vista guest or a linux hvm guest?
>>
>> The page fault and the screen still stays on Windows issue are due to
>> the lack of FLR in your kernel. Doing a FLR on the graphic card before
>> booting and when the domain shutdown will fix those.
>>
>> Thanks,
>> Jean
>>


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