https://bugs.freedesktop.org/show_bug.cgi?id=32556
--- Comment #18 from Gildas Le Nadan 3ntr0p13@gmail.com 2010-12-24 00:10:58 PST --- (In reply to comment #14)
Also try:
pll->flags |= (RADEON_PLL_USE_FRAC_FB_DIV | RADEON_PLL_PREFER_CLOSEST_HIGHER | RADEON_PLL_NO_ODD_POST_DIV);
No image at all with this one. See kms_frac_closest_odd.regs