https://bugs.freedesktop.org/show_bug.cgi?id=69675
--- Comment #12 from Christian König deathsimple@vodafone.de --- (In reply to comment #3)
Created attachment 86598 [details] [review] use hw generated cts and n values rather than the sw programmed values
Does this patch help? If not, it may be worth adding some slop to the r600_hdmi_predefined_acr[] table to handle rounding differences so the appropriate defined values get selected.
On some early R6xx the hardware generation of CTS/N values didn't worked reliable, that's why I've done it like fglrx and calculated the values manually/used a table for it.