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Problems running DRI with current on Debian/unstable?

Just feeding google and interested readers. DRI worked with 6.9 but with version 7.0 it’s failing?

% LIBGL_DEBUG=verbose glxgears
libGL: XF86DRIGetClientDriverName: 1.5.1 i915 (screen 0)
libGL: OpenDriver: trying /usr/lib/dri/
libGL error: dlopen /usr/lib/dri/ failed (/usr/lib/dri/ cannot open shared object file: No such file or directory)                                                                                                                    
libGL error: unable to find driver:

Ok, missing libgl1-mesa-dri of course. But when running glxinfo after installing the package you might notice something like:

ERROR!  sizeof(I830DRIRec) does not match passed size from device driver

Solution (thanks for hint, formorer!):

apt-get install libgl1-mesa-dri/experimental libgl1-mesa-glx/experimental 

Useful resources:

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