Manual and options for the "modesetting" driver

[Sérgio Basto]

On Qui, 2015-06-18 at 11:41 -0400, Stefan Monnier wrote:
> I'm trying to use the "modesetting" driver for a dual-monitor setup
> using a displaylink adapter and a Poulsbo card, and where the monitors
> are rotated and where I only want 16bpp.
> 
> The only part I managed to get is an output on my Poulsbo-connected
> monitor, but all the other things I specified in my xorg.conf seem to be
> ignored, so: is there a manual somewhere listing the available options
> (I've discovered "kmsdev" so far)?

Now things goes with xrandr command , type xrandr , see what Xorg.bin
detects . 
You just want set xorg.conf , to force some detection or drives at
startup (in xorg.conf you also could do some settings), after that
dual-monitor setup will be managed with xrandr  and other ui tools of
xrandr  .


> FWIW, find appended my current attempt (which gives the same result as
> a trivial xorg.conf that just says to use "modesetting").
> 
> 
>         Stefan
> 
> 
> ############### DisplayLink Stuff ###############
> 
> Section "Device"
>         Identifier      "DisplayLinkDevice"
>         driver          "modesetting"
>         Option  "kmsdev" "/dev/dri/card1"
> 	Option	"Rotate"	"CCW"
> EndSection
> 
> Section "Monitor"
>     Identifier "DisplayLinkMonitor"
> EndSection
> 
> Section "Screen"
>     Identifier "DisplayLinkScreen"
>     Device "DisplayLinkDevice"
>     Monitor "DisplayLinkMonitor"
>     SubSection "Display"
>         Depth 16         # 24bit works fine but for USB 2.0 a lot of data
>         #Modes "1280x1024"
>     EndSubSection
> EndSection
> 
> ############ Original Video Settings ###########
> 
> Section "Device"
>         Identifier      "Configured Video Device"
>         driver          "modesetting"
>         Option  "kmsdev" "/dev/dri/card0"
> 	Option	"Rotate" "CCW"
> EndSection
> 
> Section "Monitor"
>         Identifier      "Configured Monitor"
> 	# Doesn't seem to work.
> 	#Option	"Rotate"	"left"
> EndSection
> 
> Section "Screen"
>         Identifier      "DefaultScreen"
>         Monitor         "Configured Monitor"
>         Device          "Configured Video Device"
> EndSection
> 
> Section "ServerLayout"
> 	Identifier "Server Layout"
> 	Screen 0 "DefaultScreen" 0 0
>     	Screen 1 "DisplayLinkScreen" RightOf "DefaultScreen"
>         Option "Xinerama" "on"
> EndSection
> 
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-- 
Sérgio M. B.