From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org
Subject: [Bug 23495] nouveau KMS produces no output on a Dell
3008WFP monitor
Date: Mon, 24 Aug 2009 20:35:20 -0700 (PDT)
Message-ID: <20090825033520.4548013005B@annarchy.freedesktop.org>
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http://bugs.freedesktop.org/show_bug.cgi?id=23495
Ben Skeggs changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
--- Comment #2 from Ben Skeggs 2009-08-24 20:35:19 PST ---
Ok, this looks like a failure to setup dual-link TMDS which the larger monitor
would require to run at its native resolution. To solve the immediate problem,
load the nouveau kernel module with "modprobe nouveau duallink=0" to reject
modes that require more bandwidth than is available on single-link TMDS. You
won't be running at your monitor's native mode, but you should have an image.
Now, we don't know exactly how to program dual-link as of yet so if you're
willing to do some experimentation that'd be *really* good. Also, grabbing
traces of the NVIDIA binary driver initialising it would help a lot. See
http://nouveau.freedesktop.org/wiki/MmioTrace for details on how to do this.
For some random testing that may help, try playing with the uscript_tmds module
option. Valid values for most cards are 0x0001 0x0002 and 0x0105. 0x0001 is
the default, to try the others use "modprobe nouveau uscript_tmds=0x0105" etc.
Thanks!
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