[dri/i915] driver broken, missing t_vb_cull.c

[Keenan Pepper]

3D accelerated graphics was working great on my Intel 845G video chip with
xlibmesa-dri 6.8.1-1ubuntu10, but I upgraded and now it's gone. Someone from
#xorg suggested I run "LIBGL_DEBUG=verbose glxinfo" and that looks like it
revealed the problem:

$ LIBGL_DEBUG=verbose glxinfo
name of display: :0.0
libGL: XF86DRIGetClientDriverName: 1.3.0 i915 (screen 0)
libGL: OpenDriver: trying /usr/X11R6/lib/modules/dri/i915_dri.so
libGL error: dlopen /usr/X11R6/lib/modules/dri/i915_dri.so failed
(/usr/X11R6/lib/modules/dri/i915_dri.so: undefined symbol: _tnl_vertex_cull_stage)
libGL error: unable to find driver: i915_dri.so
display: :0 screen: 0
direct rendering: No

[Daniel Stone (daniels)]

Yep, mesa_6_2_branch didn't have some Imakefile changes; I fixed this locally
yesterday.

[Daniel Stone (daniels)]

*** Bug 10184 has been marked as a duplicate of this bug. ***

[Daniel Stone (daniels)]

 xorg (6.8.1-1ubuntu12) hoary; urgency=low
 .
   * Resync Imakefiles for Mesa, so t_vb_cull gets built, and i915_dri is
     loadable (closes: Ubuntu#5664).
   * Also from Mesa 6.2.x branch, grab fix for lockups on Radeon M7-class chips
     (fd.o#2361).
   * Update from 6.8 branch; remove patches #096 and #601 as they were merged in
     this morning. This release is almost entirely equivalent to 6.8.1.903
     (aka 6.8.2RC3).
   * Disable building of largely defunct XRX plugin in linux.cf.
   * Guess at a reasonable default for $DISPLAY_TYPE if xresprobe doesn't feed
     us a display type (closes: Ubuntu#5639).
   * Set $LAPTOP in xserver-xorg.postinst.in.
   * Move the test for resolutions-via-DDC-but-no-sync-ranges around in
     xserver-xorg.postinst.in, so $NRES is set when we call it (closes:
     Ubuntu#5754).
   * Write sync ranges for all r128s on powerpc (closes: Ubuntu#5940).
   * Remove speedo and v4l from the list of modules loaded per default.
   * Fix comments at the top of the config file to be more accurate (closes:
     Ubuntu#5748).
   * Don't load GLcore in the default set of modules, per Adam Jackson.
   * Add hardened Linux support via a small call in postinst.
   * Change default builder from canonical.com -> ubuntu.com.
   * Add <X11/Xlib.h> to scrnsaver.h's #includes, add libx11-dev dep to
     libxss-dev.