[virt-tools-list] virt-manager -- unwatchable choppy performance using fullscreen flash in windows VM

[Greg Sheremeta]

----- Original Message -----
> From: "Cole Robinson" <crobinso at redhat.com>
> To: "Greg Sheremeta" <gshereme at redhat.com>, virt-tools-list at redhat.com
> Sent: Wednesday, October 15, 2014 4:03:58 AM
> Subject: Re: [virt-tools-list] virt-manager -- unwatchable choppy performance using fullscreen flash in windows VM
> 
> On 10/12/2014 10:05 PM, Greg Sheremeta wrote:
> > Hey all,
> > 
> > Using a high-end Fedora 20 host, I get very poor choppy performance running
> > flash full-screen
> > in a Windows VM. I need to use Windows due to DRM stuff
> > (nflsundayticket.tv). I've tried
> > different virtual graphics adapters, but nothing helps. Attempting
> > 1920x1080. Flash 15.
> > Using remote-viewer or virt-manager, spice, QXL is set to 64 MB RAM.
> > 
> > Some googling suggests that QXL just can't handle 1920x1080 flash
> > fullscreen.
> > 
> > Using VirtualBox gives pretty flawless performance at 1920x1080. But I want
> > to use
> > virt-manager, of course :)
> > 
> > I've also had success using VLC to stream the non-maximized flash player
> > from the windows
> > guest to the host, and then VLC scales up on the host (using host hardware
> > acceleration,
> > I'm sure). But this is a bit of a pain to manage.
> > 
> > One option I've read about is passing through a graphics adapter. My host
> > machine has
> > my primary nvidia card, but it also has the onboard Intel adapter that I
> > don't use. Maybe
> > if I can pass this Intel card through, I'd get the performance I'm looking
> > for. From what
> > I can tell, this isn't quite ready for primetime.
> > 
> > 1. Can someone update me on the status of graphics passthrough in
> > virt-manager?
> 
> Graphics passthrough only works with a small selection of graphics cards, and
> requires latest upstream code. So if you're motivated you can get it to work
> but it isn't trivial. There's some info here: http://vfio.blogspot.com/

Thanks. I'm not *that* motivated, yet :)

> 
> > 2. Does anyone have any ideas other than passing through a card?
> 
> Try virt-viewer to eliminate virt-manager from the equation. Aside from that,
> ask on a spice specific list for more info.

Same performance with virt-viewer, so it is spice. I asked on spice-devel.
Thanks, Cole.

Greg

> 
> - Cole
>