[Bug 172421] radeon: allow to set the TMDS frequency by a special kernel parameter

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=172421

--- Comment #7 from Elmar Stellnberger <estellnb at elstel.org> ---
  It obviously works stable over HDMI as well. Besides this I have just tested
an ATI Mobility Radeon HD 2600 XT/2700 and it can provide 3840x2160_22.00 over
its HDMI port with a radeon.hdmimhz of 250. With a hdmimhz of 297 I get some
screen distortions but that does not harm the card.
  Why not just unlock a new feature of so many radeon cards? Nouveau developers
did so for long with their device driver.

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