Comment 6 for bug 606244

libdrm takes care of the function drmGetBusid.

It seems like this package juist got updated with a new version this is availible today.

The changelog contains:

  * Update libdrm-nouveau1 to the ABI of Linux 2.6.34.
    - Drop 03_revert_abi_change.diff.
    - Bump libdrm-nouveau shlibs and symbols versions to 2.4.20-3~
      to ensure that packages built against this version are not used
      with an older libdrm-nouveau1 version.
    - Add versioned Breaks against xserver-xorg-video-nouveau to force
      an upgrade of that package and prevent X segfaults.

Can somebody hitting this bug try with libdrm - 2.4.21-1ubuntu1?

I guess it should be fixed with that.