[Interest] Problems with graphics library auto-detect on Windows

[Shantanu Tushar]

Hi Neil,

On Wed, May 11, 2016 at 7:38 PM, Neil Williams <neil+qt at copycopy.cc> wrote:

> We have also gone down the forced ANGLE route after seeing too many
> crashes caused by OpenGL, crashes on app start during the dynamic detection
> are particularly frustrating. Intel cards seem to be the worst offender
> though we were seeing them from all card types.
>
> When our app crashes we upload crash dumps with GPU device and vendor id
> embedded in it, the plan was to be able to build a custom opengl blacklist
> based off these reports. The problem we had though is that were getting
> different types of crashes from lots of different device combinations and
> we had no way of checking out the crashes ourselves due to not having the
> hardware.
>

Interesting. I've wanted to have similar automatic crash dump reporting as
well. Can you share your method for doing this?

Thanks


>
> In the end we went back to selectively forcing ANGLE/software renderer
> based on a blacklist we maintain ourselves, which is basically the
> blacklist in openglblacklist.json along with forced software rendering for
> some VMs. We see a lot less graphics layer crashes with this setup.
>
> We only support Vista upwards on windows mind.
>
> You might also be interested in bug
> https://bugreports.qt.io/browse/QTBUG-52693 which caused OpenGL detection
> sourced crashes even when ANGLE is forced.
>
> On Tue, May 10, 2016 at 3:41 PM, Michael R Nelson <mnelson at sutron.com>
> wrote:
>
>> Hi all,
>>
>>
>>
>> Our app is QML based and uses Qt Quick Controls. We build for Windows, OS
>> X, iOS, and Android.
>>
>>
>>
>> As you know, Qt auto-selects a graphics library at startup (OpenGL,
>> ANGLE, or Mesa llvmpipe). About 1 in 15 of our users report our app fails
>> during this auto-detect process on Windows. Most failures appear to be poor
>> OpenGL support in the card/drivers, but sometimes the issue is “vsprintf_s”
>> export not found error, when running on XP. Updating drivers is rarely a
>> fix for these scenarios.
>>
>>
>>
>> We are coming to the conclusion we should force the use of ANGLE on
>> Windows 7 and above, and force SoftOpenGL on XP. Have others also come to
>> this conclusion? Does anyone have any helpful tips to share on this issue?
>>
>>
>>
>> Thanks,
>>
>> Mike
>>
>>
>>
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-- 
Shantanu Tushar    (UTC +0530)
shantanu.io
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