[Bug 89661] [suse sna] failed to set mode: Invalid argument [22]

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89661

--- Comment #20 from Chris Wilson <chris at chris-wilson.co.uk> ---
(In reply to Adam Taciak from comment #19)
> It fail even when I try to set something like:
> 
> xrandr --output DP1 --mode 1920x1080 --primary --output LVDS1 --mode
> 1024x768 --right-of DP1 --output DP2 --mode 1920x1080 --right-of LVDS1
> --verbose
> 
> I assume that at least on two monitors should be the same refresh rate. Am I
> right? In this case I tried to set the same refresh ratio on all three. 
> 
> [taciaka at LDZ9343N ~]$ ./mon.sh 
> crtc 0: disable
> screen 0: 8x8 2x2 mm 101.60dpi
> screen 0: 4864x1080 1216x270 mm 101.60dpi
> crtc 0:    1920x1080  60.00 +0+0 "DP1"
> crtc 1:     1024x768  60.00 +1920+0 "LVDS1"
> crtc 2:    1920x1080  60.00 +2944+0 "DP2"
> xrandr: Configure crtc 2 failed
> crtc 0: disable
> crtc 1: disable
> crtc 2: disable
> crtc 3: disable
> screen 0: revert
> crtc 0: revert
> crtc 1: revert
> crtc 2: revert
> crtc 3: revert
> [taciaka at LDZ9343N ~]$
> 
> On Windows all 3 monitors have its native resolution, the biggest one
> (1920x1200) is left rotated, but I think is not relevant.
> 
> I can add that DP1 (monitor 1920x1080) is connected via DP <==> VGA
> converter. 
> According this page http://www.intel.com/support/graphics/sb/CS-033714.htm
> (What three independent display configurations are supported? > View
> information for the Intel® HD Graphics 4000/2500 of 3rd Generation Intel...
> > View a comprehensive table of supported configurations and notes), my
> graphic card should supports such configuration DP + DP + LVDS.

I can remember eDP being special (iirc that is!), but it all boils down to
whether it uses the CPU or PCH PLL. The configure failure (comment 16) seemed
to be when we couldn't find a PLL to use. It seems like we have a handful of
bogons in that code.

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