Comment 30 for bug 305979

Yeah two new commits in drm-intel-next and drm-intel-2.6.28 might help:

commit e1a6fcee467556a7e955fe1f7ccc134dd2f974e7
Author: Jesse Barnes <email address hidden>
Date: Tue Jan 6 10:21:24 2009 -0800

    drm/i915: set vblank enabled flag correctly across IRQ install/uninstall

commit 9f4f07ceb1716d8796089fcef91621c5f07c872a
Author: Jesse Barnes <email address hidden>
Date: Thu Jan 8 10:42:15 2009 -0800

    drm/i915: don't enable vblanks on disabled pipes

along with libdrm:
commit f4f76a6894b40abd77f0ffbf52972127608b9bca
Author: Jesse Barnes <email address hidden>
Date: Wed Jan 7 10:18:08 2009 -0800

    libdrm: add timeout handling to drmWaitVBlank

Please confirm and close this out if things look good for you now.