[winswitch] Problem on Polaris

[sivmu]

Am 04.11.2016 um 03:16 schrieb Antoine Martin via shifter-users:
> In that case, try running with opengl disabled:
> xpra attach --opengl=no ...
> 
> And if that helps, please post the bug report's opengl data.
> Or just post the output from the gl_check.py tool so we can greylist
> those GPUs until the drivers become more mature.
> 
> Cheers
> Antoine

That did not help either.
I also tried to turn off as many features of xpra as possible but
nothing changed, except fewer error messages about missing dependencies
like printing support.