Nouveau - Nov 2007 - [Bug 10673] nouveau can't use a Dell 2001FP in 1600x1200 mode

http://bugs.freedesktop.org/show_bug.cgi?id=10673





------- Comment #2 from ajax at nwnk.net  2007-11-18 08:07 PST -------
(In reply to comment #0)
> The long term best solution would be to figure out why this is being
> misdetected and correct that. A good short term solution would be to
implement
> the "PanelSize" option in nouveau (see the radeon driver) to
allow the user to
> override the detected panel size and force the driver to attempt to
continue.
I've tried this, it doesn't work.

As far as I can tell, what actually happens with nv and nouveau on digital
connections is that the "resolution" we set is really just the size of
the
framebuffer, which is then fed to an upscaler for scanout.  In other words,
your panel is always scanning out whatever the BIOS set it to at init time,
which defaults to 1280x1024 because that's nice and conservative.

The nvidia driver, we can assume, just goes ahead and bangs the output
registers directly.

Experimentally, using RANDR to resize the screen is subjectively faster on nv
than on, say, radeon.  This corroborates the above theory; you're not
changing
the signalling timings, so the monitor doesn't need to resync.


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http://bugs.freedesktop.org/show_bug.cgi?id=10673





------- Comment #3 from madman2003 at gmail.com  2007-11-18 08:15 PST -------
These sort of issues should not exist in the randr-1.2 codepath (Option
"Randr12" in the device section) of the driver.

This should work reasonably (for your generation of card), if not, then you may
be asked for a mmio-trace of the nvidia binary, so i can figure out what's
wrong.

nv indeed does not change the clocks for flatpanels (at all).

The randr-1.2 codepath of nouveau should detect the largest mode and bring that
up.


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