Re: [Xen-users] Choice between poor HAP performance or no audio? (VGA passthrough)

[Zir Blazer <zir_blazer@xxxxxxxxxxx>]

Can you list your Hardware specs (Specially Motherboard) Dom0 OS, Kernel 
version, etc? The only thing I would suggest is try with Xen 4.5 or downgrade 
to 4.3. I have a WXP x64 DomU with a Radeon 5770 and I didn't had to do 
anything fancy to assing it a whole 24 GB of RAM.



To: xen-users@xxxxxxxxxxxxx
From: Scott Helvick <scott.helvick@xxxxxxxxx>
Date: Wed, 13 May 2015 19:29:23 -0700
Delivery-date: Thu, 14 May 2015 10:27:56 +0000
List-id: Xen user discussion <xen-users.lists.xen.org>


>> Hey folks -- yeah, I know, it's a weird one.
>> 
>> I was initially investigating performance issues with VGA passthrough and 
>> 8GB of memory when I found this: 
>> http://lists.xenproject.org/archives/html/xen-users/2014-09/msg00117.html. 
>> As per the recommendation, disabling HAP, did work, but that resulted in 
>> another problem -- the video card's HDMI audio stopped working! The audio 
>> device still shows up in the Win7 guest and otherwise appears to work, but 
>> no sound actually comes out.
>> 
>> So currently my options are:
>> 1) HAP, sound, low DomU RAM (1GB or so)
>> 2) Shadow paging, no sound, 8GB RAM
>> 3) HAP, sound, 8GB RAM, and a basically unusable guest :-(
>> 
>> Xen is 4.4 with the xl toolstack. Video card is a Radeon R9 290X @ 4k; 
>> latest Catalyst drivers (15.4 beta). I wondered if the 4k was playing a 
>> part, but I did decrease the resolution to 1920x1080, to no effect. Also no 
>> luck switching between DP and HDMI cables.                                   
>>        
_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxx
http://lists.xen.org/xen-users