[virglrenderer-devel] Strange graphical glitches under virgl.

[Lepton Wu]

Hi,

I have an issue which I recorded a video  to show the bug:
https://youtu.be/ECGDCMAOTxs
You can see, sometimes, there is a "wrong block" of rendering. It's
always some kind of rectangle somewhere.
A strange part is: I've never seen this kind of issue if I am running
3D android games under virgl. Games always
running fine. But for Chrome, it sometimes come with this kind of
weird graphics.

So I have 2 questions:

1.  What kind of guest are you using to test virgl?  I am trying to
test some other guests to see if I can reproduce
same issue so I can confirm if this is something specific to my guest
(Chrome OS).

2.  Do you have any rough idea that this is actually some fixed bug
upstream somewhere?  I am using TOT virglrenderer + TOT qemu.
But my mesa (mesa-18.1_pre1) and linux kernel (4.4) in guest which
could be a little outdated.

Thanks for your help!