On Fri, Jun 26, 2020 at 03:27:58PM +0300, Dmitry Shachnev wrote:
> I tried to debug it, and found out that for some reason
> __glXLookupVendorByName("mesa") fails, so __glXLookupVendorByScreen
> falls back to FALLBACK_VENDOR_NAME (= "indirect") which does not work
> properly. No time to debug further...
>
> This issue happens with PySide and PyQt programs, but not with C++.
> Maybe it's the same issue as #960073.
Some more information on this: it looks like dlopen'ing libGLX_mesa.so.0
returns NULL (src/GLX/libglxmapping.c:430).
LD_PRELOAD'ing that library helps. Adding the following two lines to top
of web_engine_initialize.py also helps:
import ctypes
ctypes.CDLL('libGLX_mesa.so.0', ctypes.RTLD_GLOBAL)
I can't say why dlopen fails without that, though.
--
Dmitry Shachnev
Attachment:
signature.asc
Description: PGP signature