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List:       freedesktop-xorg
Subject:    Re: RandR 1.5 Monitors: "No monitor named '...'"
From:       Aaron Plattner <aplattner () nvidia ! com>
Date:       2016-09-15 21:50:22
Message-ID: cda8b749-1459-51c7-25c0-6aa0dba7f7a5 () nvidia ! com
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On 09/15/2016 12:56 PM, Nathan Schulte wrote:
> Thanks for the reply, Aaron.  I assume then I've stumbled upon an issue
> w/ this version of xrandr / X's RandR 1.5 impl?
> 
> On 09/14/2016 11:16 AM, Aaron Plattner wrote:
> > There is supposed to be a "ConnectorNumber" property that you can use to
> > correlate these RandR outputs with physical connectors.
> > 
> > https://cgit.freedesktop.org/xorg/proto/randrproto/tree/randrproto.txt?id=cf3272717e08325f69bdbb759ab35cb4d1839fb7#n1931
> >  
> > 
> > E.g., on my system, these two are halves of the same mini-DisplayPort
> > connector:
> > 
> > DP-4 disconnected (normal left inverted right x axis y axis)
> > CscMatrix: 65536 0 0 0 0 65536 0 0 0 0 65536 0
> > BorderDimensions: 4
> > supported: 4
> > Border: 0 0 0 0
> > range: (0, 65535)
> > SignalFormat: DisplayPort
> > supported: DisplayPort
> > ConnectorType: DisplayPort
> > ConnectorNumber: 1
> > _ConnectorLocation: 1
> 
> Aaron, what did you use to produce that output?  I see something similar
> w/ the output of xrandr (note the "Clones" and "CRTC" and "CRTCs"
> properties).  If I understand correctly, all of these outputs are from
> the Intel Haswell HD 4600, and none from the AMD Radeon.

It was "xrandr --prop" with the NVIDIA driver since that's what I work 
on. --verbose should also print the properties so if you're not seeing 
them, then it sounds like the Intel driver isn't providing them.

> > $ xrandr --version
> > xrandr program version       1.5.0
> > Server reports RandR version 1.5
> 
> > $ xrandr --verbose
> > Screen 0: minimum 8 x 8, current 3600 x 3840, maximum 32767 x 32767
> > eDP1 connected (normal left inverted right x axis y axis)
> > Identifier: 0x79
> > Timestamp:  56437148
> > Subpixel:   unknown
> > Clones:
> > CRTCs:      0 1 2
> > --- snip ---
> > DP1 disconnected (normal left inverted right x axis y axis)
> > Identifier: 0x7a
> > Timestamp:  56437148
> > Subpixel:   unknown
> > Clones:     HDMI1
> > CRTCs:      0 1 2
> > --- snip ---
> > DP2 connected primary 1200x3840+0+0 (0x13b) left (normal left inverted
> > right x axis y axis) 580mm x 360mm
> > Identifier: 0x7b
> > Timestamp:  56437148
> > Subpixel:   unknown
> > Gamma:      1.0:1.0:1.0
> > Brightness: 1.0
> > Clones:     HDMI3
> > CRTC:       0
> > CRTCs:      0 1 2
> > --- snip ---
> > HDMI1 connected 1200x1920+2400+0 (0x13a) left (normal left inverted
> > right x axis y axis) 580mm x 360mm
> > Identifier: 0x7c
> > Timestamp:  56437148
> > Subpixel:   unknown
> > Gamma:      1.0:1.0:1.0
> > Brightness: 1.0
> > Clones:     DP1
> > CRTC:       1
> > CRTCs:      0 1 2
> > --- snip ---
> > HDMI2 connected 1200x1920+1200+0 (0x13a) left (normal left inverted
> > right x axis y axis) 580mm x 360mm
> > Identifier: 0x7d
> > Timestamp:  56437148
> > Subpixel:   unknown
> > Gamma:      1.0:1.0:1.0
> > Brightness: 1.0
> > Clones:
> > CRTC:       2
> > CRTCs:      0 1 2
> > --- snip ---
> > HDMI3 disconnected (normal left inverted right x axis y axis)
> > Identifier: 0x7e
> > Timestamp:  56437148
> > Subpixel:   unknown
> > Clones:     DP2
> > CRTCs:      0 1 2
> > --- snip ---
> > VIRTUAL1 disconnected (normal left inverted right x axis y axis)
> > Identifier: 0x7f
> > Timestamp:  56437148
> > Subpixel:   no subpixels
> > Clones:
> > CRTCs:      3
> > --- snip ---
> 
> I'm still not sure how or why I would use this VIRTUAL1 output; I can't
> help but wonder if it has to do w/ DRI Prime (hybrid graphics), but I
> guess it's not and is [necessary, and subsequently] used internally in
> the driver stack somehow else.
> 
> --
> Nate
> 
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