[Nouveau] [Bug 94342] Nvidia G96GLM 3840x2160 at 30 not functional with nouveau

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94342

Elmar Stellnberger <estellnb at elstel.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |WORKSFORME

--- Comment #9 from Elmar Stellnberger <estellnb at elstel.org> ---
  As it turned out a refresh rate of 30Hz can be achieved with the OSS-driver
and the right modeline:

  Modeline "3840x2160_30.00"  268.06  3840 3992 4080 4112  2160 2161 2164 2173
+hsync -vsync

  It is a trick to set nouveau.hdmimhz=296 instead of 297 in order to prevent
the automatic mode requiring a higher TMDS frequency to appear automatically
which blackens the screen. Once a mode with too high frequency has been set the
external monitor will stay without signal until I reboot. In a practice the
TMDS limit may neither be 225 nor 297 but somewhere in between.

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