> Yesterday I did an upgrade on my T61 running ascii. After a reboot, I found
> that OpenGL acceleration is gone.
> (/usr/lib/x86_64-linux-gnu/dri/i965_dri.so: undefined symbol:
> _glapi_tls_Dispatch)
> ii  libegl-mesa0:amd64    18.1.6-1~bpo9+1 amd64           free
> implementation of the EGL API -- Mesa vendo
> ii  libegl1-mesa:amd64    18.1.6-1~bpo9+1 amd64           transitional dummy
> package
> ii  libgl1-mesa-dri:amd64 13.0.6-1+b2     amd64           free
> implementation of the OpenGL API -- DRI mod
> ii  libgl1-mesa-glx:amd64 18.1.6-1~bpo9+1 amd64           transitional dummy
> package
> ii  libglapi-mesa:amd64   18.1.6-1~bpo9+1 amd64           free
> implementation of the GL API -- shared libr
> ii  libglu1-mesa:amd64    9.0.0-2.1       amd64           Mesa OpenGL
> utility library (GLU)
> ii  libglx-mesa0:amd64    18.1.6-1~bpo9+1 amd64           free
> implementation of the OpenGL API -- GLX ven
> ii  mesa-va-drivers:amd64 13.0.6-1+b2     amd64           Mesa VA-API video
> acceleration drivers
> ii  mesa-vdpau-drivers:am 13.0.6-1+b2     amd64           Mesa VDPAU video
> acceleration drivers