Bug#911680: xserver-xorg-core: X server crashes when loading libglamorgl.so module (Bug #911680)

[Massimo MANGHI <massimo.manghi@unipr.it>]

Hello Bernhard

thank you for taking care of the problem so quickly

On 10/23/18 9:24 PM, Bernhard Übelacker wrote:
> Hello Massimo Manghi,
> just tried to reproduce the issue inside a debian buster amd64 qemu VM.
> I never hit the crash and found you were probably running inside a VirtualBox.
> 

you got it

> Nevertheless with installed debug informations I think the crash shown
> in the Xorg.log points to that location:
> 
> 
> [...]
> 
> glamor/glamor_egl.c:
> 990
> 991         renderer = glGetString(GL_RENDERER);
> 992         if (strstr((const char *)renderer, "llvmpipe")) {
> 993             xf86DrvMsg(scrn->scrnIndex, X_INFO,
> 994                        "Refusing to try glamor on llvmpipe\n");
> 
> 
> Therefore my guess would be that "glGetString(GL_RENDERER)" returns
> in VirtualBox (or at least that installation) something odd.
> 
> 
> That line originates from this patch that is applied upstream and
> I assume is cherry picked [1] for that debian package version:
> ./debian/patches/08_dont-init-glamor-on-llvmpipe.diff
> 
> Upstream added on top of that another patch [2] to
> avoid a crash that is probably exact that one we see here.
> 

very good, I guess this clarifies the issue and the new patch will be 
included in the next upload, is it correct? Am I supposed to take any 
further action? Something like changing the bug status or applying some 
extra tag to the bug in order to specify the environment (VirtualBox) 
where the problem occurs?

  thank you a lot

  regards

  -- Massimo