[Nouveau] [Bug 25824] KMS, Dualhead: Strange bigger console

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Wed Dec 30 04:15:53 PST 2009


http://bugs.freedesktop.org/show_bug.cgi?id=25824





--- Comment #5 from Pekka Paalanen <pq at iki.fi>  2009-12-30 04:15:52 PST ---
(In reply to comment #4)
> (In reply to comment #3)
> > Case 2 you should be able to achieve with the "video" kernel command line
> > parameter, forcing the small mode on the big monitor. I hope it is documented
> > in the kernel Documentation, since I do not recall the correct syntax.
> That depends if nouveau driver uses modedb or not.
> 
> from Documentation/fb/modedb.txt

That is the legacy fb option "video". I was talking about the drmfb "video"
variant, but I cannot find the documentation. The only doc I know of is:
http://cgit.freedesktop.org/nouveau/linux-2.6/tree/drivers/gpu/drm/drm_fb_helper.c#n68

The syntax is something like:
video=<output>:<mode>

Where output is as reported by the kernel DRM/KMS.

A made-up example: video=DVI-I-1:1024x768

This option is for all DRM/KMS fb drivers AFAIK: intel, radeon and nouveau.
It's a bit odd that it isn't properly documented yet.


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