Can you clarify your statement about requesting PBOs in Viewperf? So are you 
saying that, with v8.1 through v10, VP will fail with VGL but not by default? 
I.e. it will only fail if PBOs are requested in Viewperf? (saying "only works" 
is ambiguous-- I don't know whether you meant that VGL only works in that 
situation or that the offending code is only activated in that situation.) The 
reason I ask is that I know I've used VP 9 with VGL successfully, and I'm 
pretty sure it was since PBO readback became the default in VGL.

> On Sep 6, 2014, at 1:00 PM, Nathan Kidd <nathan...@spicycrypto.ca> wrote:
> 
>> On 19/05/14 11:25 PM, DRC wrote:
>> If you can verify which version of Viewperf this issue first appeared
>> in, I can at least document it.
> 
> Sorry, I never replied to you.  I see you've since documented version 
> 11.  The offending code first shipped with SPECviewperf 8.1  (8.0.1 is 
> OK). v9, v10 and v11 all have the same problem (though in v11 the code 
> changed from "only work when PBOs are requested for viewperf", to "never 
> work at all")
> 
> -Nathan
> 
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