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

[bugzilla-daemon]

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

Elmar Stellnberger  changed:

   What|Removed |Added

 Status|NEW |RESOLVED
 Resolution|--- |WORKSFORME

--- Comment #9 from Elmar Stellnberger  ---
  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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[Nouveau] [Bug 94342] Nvidia G96GLM 3840x2160@30 not functional with nouveau

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

--- Comment #8 from Elmar Stellnberger  ---
same with 4.6.0-ARCH-00466-ge80ac9b.

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

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

--- Comment #7 from Elmar Stellnberger  ---
Created attachment 123451
  --> https://bugs.freedesktop.org/attachment.cgi?id=123451=edit
another mmiotrace of setting 3840x2160@30 with the proprietary driver

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

[bugzilla-daemon]

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

--- Comment #6 from Elmar Stellnberger  ---
Created attachment 123450
  --> https://bugs.freedesktop.org/attachment.cgi?id=123450=edit
mmiotrace of setting 3840x2160@30 with the proprietary driver

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

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

--- Comment #5 from Elmar Stellnberger  ---
same problem with 4.6.0-rc5-ARCH-5-g0b20a43.

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

[bugzilla-daemon]

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

--- Comment #4 from Elmar Stellnberger  ---
4.6.0-rc2-ARCH-4-g603539d: As soon as I boot with a hdmimhz=297 I get a
blackscreen though the graphics card is known to work with 3840x2160@30 under
Windows; i.e. that should work.

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

[bugzilla-daemon]

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

--- Comment #3 from Elmar Stellnberger  ---
Created attachment 122046
  --> https://bugs.freedesktop.org/attachment.cgi?id=122046=edit
3840x2160@30 - snapshot of the monitor

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

[bugzilla-daemon]

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

--- Comment #1 from Elmar Stellnberger  ---
Created attachment 122044
  --> https://bugs.freedesktop.org/attachment.cgi?id=122044=edit
Xorg.0.log

Linux AmiloXi3650 4.5.0-rc4-ARCH #4 SMP PREEMPT Sat Feb 20 22:27:16 CET 2016
x86_64 GNU/Linux
X.Org X Server 1.18.1
Release Date: 2016-02-08

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

[bugzilla-daemon]

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

--- Comment #2 from Elmar Stellnberger  ---
Created attachment 122045
  --> https://bugs.freedesktop.org/attachment.cgi?id=122045=edit
journal

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