Bug#488283: libgl1-mesa-glx: drmMap of framebuffer failed, reverting to software rendering

[Brice Goglin <Brice.Goglin@ens-lyon.org>]

Sten Heinze wrote:
> Package: libgl1-mesa-glx
> Version: 7.0.3-1
> Severity: important
>
> Since my last update I noticed a immense slowdown in the graphics 
> performance. Even switching desktops needs up to several seconds. 
> Looking into Xorg.0.log I found:
>
> (EE) AIGLX error: drmMap of framebuffer failed (Invalid argument)(EE) 
> AIGLX: reverting to software rendering
>
> Same result when starting glxgears:
>
> libGL error: drmMap of framebuffer failed (Invalid argument)
> libGL error: reverting to (slow) indirect rendering
>   

Did you change your kernel recently?

Brice