Bug 100576

Summary: DP ports relabeled
Product: DRI Reporter: Paul Menzel <pmenzel+bugs.freedesktop.org>
Component: DRM/IntelAssignee: Intel GFX Bugs mailing list <intel-gfx-bugs>
Status: CLOSED FIXED QA Contact: Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity: normal    
Priority: medium CC: hjl.tools, intel-gfx-bugs, regressions
Version: DRI git   
Hardware: Other   
OS: All   
Whiteboard:
i915 platform: SKL i915 features: display/DP
Attachments:
Description Flags
A patch
none
An updated patch none

Description Paul Menzel 2017-04-05 10:04:44 UTC 
The monitor is connected to the port labels DP-1. Compared to Linux 4.9.20, with Linux 4.11-rc5 this has been relabeled in for example `xrandr`.

```
$ more /proc/version
Linux version 4.11.0-rc5.mx64.148 (root@x.molgen.mpg.de) (gcc version 5.3.0 (GCC) ) #1 SMP Wed Apr 5 11:37:44 CEST 2017
$ xrandr --verbose
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192
DP-1 disconnected (normal left inverted right x axis y axis)
	Identifier: 0x42
	Timestamp:  68623
	Subpixel:   unknown
	Clones:    
	CRTCs:      0 1 2
	Transform:  1.000000 0.000000 0.000000
	            0.000000 1.000000 0.000000
	            0.000000 0.000000 1.000000
	           filter: 
	Broadcast RGB: Automatic 
		supported: Automatic, Full, Limited 16:235
	audio: auto 
		supported: force-dvi, off, auto, on
HDMI-1 disconnected (normal left inverted right x axis y axis)
	Identifier: 0x43
	Timestamp:  68623
	Subpixel:   unknown
	Clones:    
	CRTCs:      0 1 2
	Transform:  1.000000 0.000000 0.000000
	            0.000000 1.000000 0.000000
	            0.000000 0.000000 1.000000
	           filter: 
	aspect ratio: Automatic 
		supported: Automatic, 4:3, 16:9
	Broadcast RGB: Automatic 
		supported: Automatic, Full, Limited 16:235
	audio: auto 
		supported: force-dvi, off, auto, on
DP-2 connected 1920x1080+0+0 (0x4d) normal (normal left inverted right x axis y axis) 698mm x 392mm
	Identifier: 0x44
	Timestamp:  68623
	Subpixel:   unknown
	Gamma:      1.0:1.0:1.0
	Brightness: 1.0
	Clones:     HDMI-2
	CRTC:       0
	CRTCs:      0 1 2
	Transform:  1.000000 0.000000 0.000000
	            0.000000 1.000000 0.000000
	            0.000000 0.000000 1.000000
	           filter: 
	EDID: 
		00ffffffffffff0010ac934050333630
		2e170104b54627783a73e0a35336b626
		0d5153a54b008100b300d100714fa940
		8180d1c00101a36600a0f0701f803020
		3500ba882100001a000000ff004b3352
		3930334247303633500a000000fc0044
		454c4c20555033323134510a000000fd
		001d4b1f8c1e000a20202020202001a1
		020315b1509005040302071601061112
		1513141f2030750030f2705a80b0588a
		00ba882100001e023a801871382d4058
		2c2500ba882100001e011d8018711c16
		20582c2500ba882100009e011d007251
		d01e206e285500ba882100001e8c0ad0
		8a20e02d10103e9600ba882100001800
		00000000000000000000000000000043
	Broadcast RGB: Automatic 
		supported: Automatic, Full, Limited 16:235
	audio: auto 
		supported: force-dvi, off, auto, on
  3840x2160 (0x4a)  262.8MHz +HSync -VSync +preferred
        h: width  3840 start 3888 end 3920 total 4000 skew    0 clock   65.7KHz
        v: height 2160 start 2163 end 2168 total 2191           clock   30.0Hz
  3840x2160 (0x4b)  300.0MHz +HSync +VSync
        h: width  3840 start 4016 end 4104 total 4400 skew    0 clock   68.2KHz
        v: height 2160 start 2168 end 2178 total 2250           clock   30.3Hz
  1920x1200 (0x4c)  193.2MHz -HSync +VSync
        h: width  1920 start 2056 end 2256 total 2592 skew    0 clock   74.6KHz
        v: height 1200 start 1203 end 1209 total 1245           clock   59.9Hz
  1920x1080 (0x4d)  148.5MHz +HSync +VSync *current
        h: width  1920 start 2008 end 2052 total 2200 skew    0 clock   67.5KHz
        v: height 1080 start 1082 end 1087 total 1125           clock   60.0Hz
  1920x1080 (0x4e)  148.5MHz +HSync +VSync
        h: width  1920 start 2008 end 2052 total 2200 skew    0 clock   67.5KHz
        v: height 1080 start 1084 end 1089 total 1125           clock   60.0Hz
  1920x1080 (0x4f)  148.5MHz +HSync +VSync
        h: width  1920 start 2448 end 2492 total 2640 skew    0 clock   56.2KHz
        v: height 1080 start 1084 end 1089 total 1125           clock   50.0Hz
  1920x1080 (0x50)  148.4MHz +HSync +VSync
        h: width  1920 start 2008 end 2052 total 2200 skew    0 clock   67.4KHz
        v: height 1080 start 1084 end 1089 total 1125           clock   59.9Hz
  1920x1080i (0x51)   74.2MHz +HSync +VSync Interlace
        h: width  1920 start 2008 end 2052 total 2200 skew    0 clock   33.8KHz
        v: height 1080 start 1084 end 1094 total 1125           clock   60.1Hz
  1920x1080i (0x52)   74.2MHz +HSync +VSync Interlace
        h: width  1920 start 2448 end 2492 total 2640 skew    0 clock   28.1KHz
        v: height 1080 start 1084 end 1094 total 1125           clock   50.0Hz
  1920x1080 (0x53)   74.2MHz +HSync +VSync
        h: width  1920 start 2558 end 2602 total 2750 skew    0 clock   27.0KHz
        v: height 1080 start 1084 end 1089 total 1125           clock   24.0Hz
  1920x1080i (0x54)   74.2MHz +HSync +VSync Interlace
        h: width  1920 start 2008 end 2052 total 2200 skew    0 clock   33.7KHz
        v: height 1080 start 1084 end 1094 total 1125           clock   60.0Hz
  1920x1080 (0x55)   74.2MHz +HSync +VSync
        h: width  1920 start 2558 end 2602 total 2750 skew    0 clock   27.0KHz
        v: height 1080 start 1084 end 1089 total 1125           clock   24.0Hz
  1600x1200 (0x56)  162.0MHz +HSync +VSync
        h: width  1600 start 1664 end 1856 total 2160 skew    0 clock   75.0KHz
        v: height 1200 start 1201 end 1204 total 1250           clock   60.0Hz
  1680x1050 (0x57)  146.2MHz -HSync +VSync
        h: width  1680 start 1784 end 1960 total 2240 skew    0 clock   65.3KHz
        v: height 1050 start 1053 end 1059 total 1089           clock   60.0Hz
  1280x1024 (0x58)  135.0MHz +HSync +VSync
        h: width  1280 start 1296 end 1440 total 1688 skew    0 clock   80.0KHz
        v: height 1024 start 1025 end 1028 total 1066           clock   75.0Hz
  1280x1024 (0x59)  108.0MHz +HSync +VSync
        h: width  1280 start 1328 end 1440 total 1688 skew    0 clock   64.0KHz
        v: height 1024 start 1025 end 1028 total 1066           clock   60.0Hz
  1280x800 (0x5a)   83.5MHz -HSync +VSync
        h: width  1280 start 1352 end 1480 total 1680 skew    0 clock   49.7KHz
        v: height  800 start  803 end  809 total  831           clock   59.8Hz
  1152x864 (0x5b)  108.0MHz +HSync +VSync
        h: width  1152 start 1216 end 1344 total 1600 skew    0 clock   67.5KHz
        v: height  864 start  865 end  868 total  900           clock   75.0Hz
  1280x720 (0x5c)   74.2MHz +HSync +VSync
        h: width  1280 start 1390 end 1430 total 1650 skew    0 clock   45.0KHz
        v: height  720 start  725 end  730 total  750           clock   60.0Hz
  1280x720 (0x5d)   74.2MHz +HSync +VSync
        h: width  1280 start 1720 end 1760 total 1980 skew    0 clock   37.5KHz
        v: height  720 start  725 end  730 total  750           clock   50.0Hz
  1280x720 (0x5e)   74.2MHz +HSync +VSync
        h: width  1280 start 1390 end 1430 total 1650 skew    0 clock   45.0KHz
        v: height  720 start  725 end  730 total  750           clock   59.9Hz
  1024x768 (0x5f)   78.8MHz +HSync +VSync
        h: width  1024 start 1040 end 1136 total 1312 skew    0 clock   60.0KHz
        v: height  768 start  769 end  772 total  800           clock   75.0Hz
  1024x768 (0x60)   65.0MHz -HSync -VSync
        h: width  1024 start 1048 end 1184 total 1344 skew    0 clock   48.4KHz
        v: height  768 start  771 end  777 total  806           clock   60.0Hz
  800x600 (0x61)   49.5MHz +HSync +VSync
        h: width   800 start  816 end  896 total 1056 skew    0 clock   46.9KHz
        v: height  600 start  601 end  604 total  625           clock   75.0Hz
  800x600 (0x62)   40.0MHz +HSync +VSync
        h: width   800 start  840 end  968 total 1056 skew    0 clock   37.9KHz
        v: height  600 start  601 end  605 total  628           clock   60.3Hz
  720x576 (0x63)   27.0MHz -HSync -VSync
        h: width   720 start  732 end  796 total  864 skew    0 clock   31.2KHz
        v: height  576 start  581 end  586 total  625           clock   50.0Hz
  720x480 (0x64)   27.0MHz -HSync -VSync
        h: width   720 start  736 end  798 total  858 skew    0 clock   31.5KHz
        v: height  480 start  489 end  495 total  525           clock   60.0Hz
  720x480 (0x65)   27.0MHz -HSync -VSync
        h: width   720 start  736 end  798 total  858 skew    0 clock   31.5KHz
        v: height  480 start  489 end  495 total  525           clock   59.9Hz
  640x480 (0x66)   31.5MHz -HSync -VSync
        h: width   640 start  656 end  720 total  840 skew    0 clock   37.5KHz
        v: height  480 start  481 end  484 total  500           clock   75.0Hz
  640x480 (0x67)   25.2MHz -HSync -VSync
        h: width   640 start  656 end  752 total  800 skew    0 clock   31.5KHz
        v: height  480 start  490 end  492 total  525           clock   60.0Hz
  640x480 (0x68)   25.2MHz -HSync -VSync
        h: width   640 start  656 end  752 total  800 skew    0 clock   31.5KHz
        v: height  480 start  490 end  492 total  525           clock   59.9Hz
  720x400 (0x69)   28.3MHz -HSync +VSync
        h: width   720 start  738 end  846 total  900 skew    0 clock   31.5KHz
        v: height  400 start  412 end  414 total  449           clock   70.1Hz
HDMI-2 disconnected (normal left inverted right x axis y axis)
	Identifier: 0x45
	Timestamp:  68623
	Subpixel:   unknown
	Clones:     DP-2
	CRTCs:      0 1 2
	Transform:  1.000000 0.000000 0.000000
	            0.000000 1.000000 0.000000
	            0.000000 0.000000 1.000000
	           filter: 
	aspect ratio: Automatic 
		supported: Automatic, 4:3, 16:9
	Broadcast RGB: Automatic 
		supported: Automatic, Full, Limited 16:235
	audio: auto 
		supported: force-dvi, off, auto, on
DP-3 disconnected (normal left inverted right x axis y axis)
	Identifier: 0x46
	Timestamp:  68623
	Subpixel:   unknown
	Clones:     HDMI-3
	CRTCs:      0 1 2
	Transform:  1.000000 0.000000 0.000000
	            0.000000 1.000000 0.000000
	            0.000000 0.000000 1.000000
	           filter: 
	Broadcast RGB: Automatic 
		supported: Automatic, Full, Limited 16:235
	audio: auto 
		supported: force-dvi, off, auto, on
HDMI-3 disconnected (normal left inverted right x axis y axis)
	Identifier: 0x47
	Timestamp:  68623
	Subpixel:   unknown
	Clones:     DP-3
	CRTCs:      0 1 2
	Transform:  1.000000 0.000000 0.000000
	            0.000000 1.000000 0.000000
	            0.000000 0.000000 1.000000
	           filter: 
	aspect ratio: Automatic 
		supported: Automatic, 4:3, 16:9
	Broadcast RGB: Automatic 
		supported: Automatic, Full, Limited 16:235
	audio: auto 
		supported: force-dvi, off, auto, on
DP-4 disconnected (normal left inverted right x axis y axis)
	Identifier: 0x48
	Timestamp:  68623
	Subpixel:   unknown
	Clones:    
	CRTCs:      0 1 2
	Transform:  1.000000 0.000000 0.000000
	            0.000000 1.000000 0.000000
	            0.000000 0.000000 1.000000
	           filter: 
	Broadcast RGB: Automatic 
		supported: Automatic, Full, Limited 16:235
	audio: auto 
		supported: force-dvi, off, auto, on
```
Comment 1 Paul Menzel 2017-04-05 10:08:41 UTC 
Here is the result for Linux 4.9.20.

```
$ more /proc/version
Linux version 4.9.20.mx64.147 (root@x.molgen.mpg.de
) (gcc version 5.3.0 (GCC) ) #1 SMP Mon Apr 3 09:59:18 CEST 2017
$ xrandr --verbose
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192
HDMI-1 disconnected (normal left inverted right x axis y axis)
	Identifier: 0x42
	Timestamp:  96316
	Subpixel:   unknown
	Clones:    
	CRTCs:      0 1 2
	Transform:  1.000000 0.000000 0.000000
	            0.000000 1.000000 0.000000
	            0.000000 0.000000 1.000000
	           filter: 
	aspect ratio: Automatic 
		supported: Automatic, 4:3, 16:9
	Broadcast RGB: Automatic 
		supported: Automatic, Full, Limited 16:235
	audio: auto 
		supported: force-dvi, off, auto, on
DP-1 connected 1920x1080+0+0 (0x4c) normal (normal left inverted right x axis y axis) 698mm x 392mm
	Identifier: 0x43
	Timestamp:  96316
	Subpixel:   unknown
	Gamma:      1.0:1.0:1.0
	Brightness: 1.0
	Clones:     HDMI-2
	CRTC:       0
	CRTCs:      0 1 2
	Transform:  1.000000 0.000000 0.000000
	            0.000000 1.000000 0.000000
	            0.000000 0.000000 1.000000
	           filter: 
	EDID: 
		00ffffffffffff0010ac934050333630
		2e170104b54627783a73e0a35336b626
		0d5153a54b008100b300d100714fa940
		8180d1c00101a36600a0f0701f803020
		3500ba882100001a000000ff004b3352
		3930334247303633500a000000fc0044
		454c4c20555033323134510a000000fd
		001d4b1f8c1e000a20202020202001a1
		020315b1509005040302071601061112
		1513141f2030750030f2705a80b0588a
		00ba882100001e023a801871382d4058
		2c2500ba882100001e011d8018711c16
		20582c2500ba882100009e011d007251
		d01e206e285500ba882100001e8c0ad0
		8a20e02d10103e9600ba882100001800
		00000000000000000000000000000043
	Broadcast RGB: Automatic 
		supported: Automatic, Full, Limited 16:235
	audio: auto 
		supported: force-dvi, off, auto, on
  3840x2160 (0x49)  262.8MHz +HSync -VSync +preferred
        h: width  3840 start 3888 end 3920 total 4000 skew    0 clock   65.7KHz
        v: height 2160 start 2163 end 2168 total 2191           clock   30.0Hz
  3840x2160 (0x4a)  300.0MHz +HSync +VSync
        h: width  3840 start 4016 end 4104 total 4400 skew    0 clock   68.2KHz
        v: height 2160 start 2168 end 2178 total 2250           clock   30.3Hz
  1920x1200 (0x4b)  193.2MHz -HSync +VSync
        h: width  1920 start 2056 end 2256 total 2592 skew    0 clock   74.6KHz
        v: height 1200 start 1203 end 1209 total 1245           clock   59.9Hz
  1920x1080 (0x4c)  148.5MHz +HSync +VSync *current
        h: width  1920 start 2008 end 2052 total 2200 skew    0 clock   67.5KHz
        v: height 1080 start 1082 end 1087 total 1125           clock   60.0Hz
  1920x1080 (0x4d)  148.5MHz +HSync +VSync
        h: width  1920 start 2008 end 2052 total 2200 skew    0 clock   67.5KHz
        v: height 1080 start 1084 end 1089 total 1125           clock   60.0Hz
  1920x1080 (0x4e)  148.5MHz +HSync +VSync
        h: width  1920 start 2448 end 2492 total 2640 skew    0 clock   56.2KHz
        v: height 1080 start 1084 end 1089 total 1125           clock   50.0Hz
  1920x1080 (0x4f)  148.4MHz +HSync +VSync
        h: width  1920 start 2008 end 2052 total 2200 skew    0 clock   67.4KHz
        v: height 1080 start 1084 end 1089 total 1125           clock   59.9Hz
  1920x1080i (0x50)   74.2MHz +HSync +VSync Interlace
        h: width  1920 start 2008 end 2052 total 2200 skew    0 clock   33.8KHz
        v: height 1080 start 1084 end 1094 total 1125           clock   60.1Hz
  1920x1080i (0x51)   74.2MHz +HSync +VSync Interlace
        h: width  1920 start 2448 end 2492 total 2640 skew    0 clock   28.1KHz
        v: height 1080 start 1084 end 1094 total 1125           clock   50.0Hz
  1920x1080 (0x52)   74.2MHz +HSync +VSync
        h: width  1920 start 2558 end 2602 total 2750 skew    0 clock   27.0KHz
        v: height 1080 start 1084 end 1089 total 1125           clock   24.0Hz
  1920x1080i (0x53)   74.2MHz +HSync +VSync Interlace
        h: width  1920 start 2008 end 2052 total 2200 skew    0 clock   33.7KHz
        v: height 1080 start 1084 end 1094 total 1125           clock   60.0Hz
  1920x1080 (0x54)   74.2MHz +HSync +VSync
        h: width  1920 start 2558 end 2602 total 2750 skew    0 clock   27.0KHz
        v: height 1080 start 1084 end 1089 total 1125           clock   24.0Hz
  1600x1200 (0x55)  162.0MHz +HSync +VSync
        h: width  1600 start 1664 end 1856 total 2160 skew    0 clock   75.0KHz
        v: height 1200 start 1201 end 1204 total 1250           clock   60.0Hz
  1680x1050 (0x56)  146.2MHz -HSync +VSync
        h: width  1680 start 1784 end 1960 total 2240 skew    0 clock   65.3KHz
        v: height 1050 start 1053 end 1059 total 1089           clock   60.0Hz
  1280x1024 (0x57)  135.0MHz +HSync +VSync
        h: width  1280 start 1296 end 1440 total 1688 skew    0 clock   80.0KHz
        v: height 1024 start 1025 end 1028 total 1066           clock   75.0Hz
  1280x1024 (0x58)  108.0MHz +HSync +VSync
        h: width  1280 start 1328 end 1440 total 1688 skew    0 clock   64.0KHz
        v: height 1024 start 1025 end 1028 total 1066           clock   60.0Hz
  1280x800 (0x59)   83.5MHz -HSync +VSync
        h: width  1280 start 1352 end 1480 total 1680 skew    0 clock   49.7KHz
        v: height  800 start  803 end  809 total  831           clock   59.8Hz
  1152x864 (0x5a)  108.0MHz +HSync +VSync
        h: width  1152 start 1216 end 1344 total 1600 skew    0 clock   67.5KHz
        v: height  864 start  865 end  868 total  900           clock   75.0Hz
  1280x720 (0x5b)   74.2MHz +HSync +VSync
        h: width  1280 start 1390 end 1430 total 1650 skew    0 clock   45.0KHz
        v: height  720 start  725 end  730 total  750           clock   60.0Hz
  1280x720 (0x5c)   74.2MHz +HSync +VSync
        h: width  1280 start 1720 end 1760 total 1980 skew    0 clock   37.5KHz
        v: height  720 start  725 end  730 total  750           clock   50.0Hz
  1280x720 (0x5d)   74.2MHz +HSync +VSync
        h: width  1280 start 1390 end 1430 total 1650 skew    0 clock   45.0KHz
        v: height  720 start  725 end  730 total  750           clock   59.9Hz
  1024x768 (0x5e)   78.8MHz +HSync +VSync
        h: width  1024 start 1040 end 1136 total 1312 skew    0 clock   60.0KHz
        v: height  768 start  769 end  772 total  800           clock   75.0Hz
  1024x768 (0x5f)   65.0MHz -HSync -VSync
        h: width  1024 start 1048 end 1184 total 1344 skew    0 clock   48.4KHz
        v: height  768 start  771 end  777 total  806           clock   60.0Hz
  800x600 (0x60)   49.5MHz +HSync +VSync
        h: width   800 start  816 end  896 total 1056 skew    0 clock   46.9KHz
        v: height  600 start  601 end  604 total  625           clock   75.0Hz
  800x600 (0x61)   40.0MHz +HSync +VSync
        h: width   800 start  840 end  968 total 1056 skew    0 clock   37.9KHz
        v: height  600 start  601 end  605 total  628           clock   60.3Hz
  720x576 (0x62)   27.0MHz -HSync -VSync
        h: width   720 start  732 end  796 total  864 skew    0 clock   31.2KHz
        v: height  576 start  581 end  586 total  625           clock   50.0Hz
  720x480 (0x63)   27.0MHz -HSync -VSync
        h: width   720 start  736 end  798 total  858 skew    0 clock   31.5KHz
        v: height  480 start  489 end  495 total  525           clock   60.0Hz
  720x480 (0x64)   27.0MHz -HSync -VSync
        h: width   720 start  736 end  798 total  858 skew    0 clock   31.5KHz
        v: height  480 start  489 end  495 total  525           clock   59.9Hz
  640x480 (0x65)   31.5MHz -HSync -VSync
        h: width   640 start  656 end  720 total  840 skew    0 clock   37.5KHz
        v: height  480 start  481 end  484 total  500           clock   75.0Hz
  640x480 (0x66)   25.2MHz -HSync -VSync
        h: width   640 start  656 end  752 total  800 skew    0 clock   31.5KHz
        v: height  480 start  490 end  492 total  525           clock   60.0Hz
  640x480 (0x67)   25.2MHz -HSync -VSync
        h: width   640 start  656 end  752 total  800 skew    0 clock   31.5KHz
        v: height  480 start  490 end  492 total  525           clock   59.9Hz
  720x400 (0x68)   28.3MHz -HSync +VSync
        h: width   720 start  738 end  846 total  900 skew    0 clock   31.5KHz
        v: height  400 start  412 end  414 total  449           clock   70.1Hz
HDMI-2 disconnected (normal left inverted right x axis y axis)
	Identifier: 0x44
	Timestamp:  96316
	Subpixel:   unknown
	Clones:     DP-1
	CRTCs:      0 1 2
	Transform:  1.000000 0.000000 0.000000
	            0.000000 1.000000 0.000000
	            0.000000 0.000000 1.000000
	           filter: 
	aspect ratio: Automatic 
		supported: Automatic, 4:3, 16:9
	Broadcast RGB: Automatic 
		supported: Automatic, Full, Limited 16:235
	audio: auto 
		supported: force-dvi, off, auto, on
DP-2 disconnected (normal left inverted right x axis y axis)
	Identifier: 0x45
	Timestamp:  96316
	Subpixel:   unknown
	Clones:     HDMI-3
	CRTCs:      0 1 2
	Transform:  1.000000 0.000000 0.000000
	            0.000000 1.000000 0.000000
	            0.000000 0.000000 1.000000
	           filter: 
	Broadcast RGB: Automatic 
		supported: Automatic, Full, Limited 16:235
	audio: auto 
		supported: force-dvi, off, auto, on
HDMI-3 disconnected (normal left inverted right x axis y axis)
	Identifier: 0x46
	Timestamp:  96316
	Subpixel:   unknown
	Clones:     DP-2
	CRTCs:      0 1 2
	Transform:  1.000000 0.000000 0.000000
	            0.000000 1.000000 0.000000
	            0.000000 0.000000 1.000000
	           filter: 
	aspect ratio: Automatic 
		supported: Automatic, 4:3, 16:9
	Broadcast RGB: Automatic 
		supported: Automatic, Full, Limited 16:235
	audio: auto 
		supported: force-dvi, off, auto, on
DP-3 disconnected (normal left inverted right x axis y axis)
	Identifier: 0x47
	Timestamp:  96316
	Subpixel:   unknown
	Clones:    
	CRTCs:      0 1 2
	Transform:  1.000000 0.000000 0.000000
	            0.000000 1.000000 0.000000
	            0.000000 0.000000 1.000000
	           filter: 
	Broadcast RGB: Automatic 
		supported: Automatic, Full, Limited 16:235
	audio: auto 
		supported: force-dvi, off, auto, on
```
Comment 2 Jani Nikula 2017-04-05 10:44:04 UTC 
Which platform? Are adapters or docks involved?
Comment 3 Paul Menzel 2017-04-05 10:51:03 UTC 
(In reply to Jani Nikula from comment #2)
> Which platform?

```
$ lspci -nn
00:00.0 Host bridge [0600]: Intel Corporation Skylake Host Bridge/DRAM Registers [8086:191f] (rev 07)
00:02.0 VGA compatible controller [0300]: Intel Corporation HD Graphics 530 [8086:1912] (rev 06)
00:14.0 USB controller [0c03]: Intel Corporation Sunrise Point-H USB 3.0 xHCI Controller [8086:a12f] (rev 31)
00:14.2 Signal processing controller [1180]: Intel Corporation Sunrise Point-H Thermal subsystem [8086:a131] (rev 31)
00:16.0 Communication controller [0780]: Intel Corporation Sunrise Point-H CSME HECI #1 [8086:a13a] (rev 31)
00:17.0 SATA controller [0106]: Intel Corporation Sunrise Point-H SATA controller [AHCI mode] [8086:a102] (rev 31)
00:1f.0 ISA bridge [0601]: Intel Corporation Sunrise Point-H LPC Controller [8086:a147] (rev 31)
00:1f.2 Memory controller [0580]: Intel Corporation Sunrise Point-H PMC [8086:a121] (rev 31)
00:1f.3 Audio device [0403]: Intel Corporation Sunrise Point-H HD Audio [8086:a170] (rev 31)
00:1f.4 SMBus [0c05]: Intel Corporation Sunrise Point-H SMBus [8086:a123] (rev 31)
00:1f.6 Ethernet controller [0200]: Intel Corporation Ethernet Connection (2) I219-V [8086:15b8] (rev 31)
```

> Are adapters or docks involved?

No. There is only a DP-to-DP-cable from the system to the monitor Dell UP3214Q. (In another bug report it was mentioned, that it might consist of “two panels”(?).)
Comment 4 Jani Nikula 2017-04-05 10:52:17 UTC 
Potentially related to the "late register" mechanism. Also, I'm not sure if there's any guarantees the connector ids would be stable across kernel releases.
Comment 5 Paul Menzel 2017-04-05 10:54:19 UTC 
(In reply to Jani Nikula from comment #4)
> Potentially related to the "late register" mechanism. Also, I'm not sure if
> there's any guarantees the connector ids would be stable across kernel
> releases.

I don’t know that either. But from a user perspective it’d be a good thing, that the label next to the port match what `xrandr` shows.
Comment 6 Jani Nikula 2017-04-06 11:14:36 UTC 
(In reply to Paul Menzel from comment #5)
> I don’t know that either. But from a user perspective it’d be a good thing,
> that the label next to the port match what `xrandr` shows.

Now *that* is most certainly not guaranteed. The OEMs can stick whatever labels to the chassis, and have whatever mechanisms to have them show up with those labels in Windows.
Comment 7 Paul Menzel 2017-04-12 08:26:28 UTC 
(In reply to Jani Nikula from comment #6)
> (In reply to Paul Menzel from comment #5)
> > I don’t know that either. But from a user perspective it’d be a good thing,
> > that the label next to the port match what `xrandr` shows.
> 
> Now *that* is most certainly not guaranteed. The OEMs can stick whatever
> labels to the chassis, and have whatever mechanisms to have them show up
> with those labels in Windows.

Understood, so I guess, I was just lucky in this case. Please ignore that comment about the label on the device then, as it’s unrelated to the problem at hand.

Either way, relabeling is a regression, as it breaks user space, where people might use xrandr scripts to set certain things up, which doesn’t work anymore.
Comment 8 Jani Nikula 2017-04-12 09:30:53 UTC 
(In reply to Paul Menzel from comment #7)
> Either way, relabeling is a regression, as it breaks user space, where
> people might use xrandr scripts to set certain things up, which doesn’t work
> anymore.

It's unfortunate, but there were never any guarantees that the labels (such as DP-1, or HDMI-3) would be stable. The number is just an iteration of how many ports of a certain type are present, in the order they have been iterated. I believe we've changed both the order and the ports that have been iterated in the past. For example, we've discovered ways to ignore ports that aren't actually there.

I'm inclined to close this as NOTABUG, but then again if you'd be into bisecting it might be interesting to see *why* the labels changed this time.
Comment 9 Paul Menzel 2017-04-13 08:25:51 UTC 
(In reply to Jani Nikula from comment #8)
> (In reply to Paul Menzel from comment #7)

[…]

> I'm inclined to close this as NOTABUG,

I still don’t understand this. It clearly breaks userspace in my opinion. If I have an appliance with the corresponding xrandr scripts put somewhere, upgrading the Linux kernel will break it.

> but then again if you'd be into bisecting it might be interesting to see *why*
> the labels changed this time.

Could you please point out some interesting commits, I could test to save some time in bisecting?
Comment 10 Jani Nikula 2017-06-01 09:22:35 UTC 
(In reply to Paul Menzel from comment #9)
> Could you please point out some interesting commits, I could test to save
> some time in bisecting?

91eefc05f0ac ("drm: Tighten locking in drm_mode_getconnector") was added in v4.11 and cited elsewhere.

bb1d132935c2 ("drm/i915/vbt: split out defaults that are set when there is no VBT") is going in v4.12 and will be backported to stable. It stops registering some bogus connectors that aren't there.
Comment 11 H.J. Lu 2017-06-01 15:15:05 UTC 
Created attachment 131642 [details] [review]
A patch

I also have a problem with kernel 4.11 which ignores my ~/.config/monitors.xml
which swaps primary/secondary displays as well as their positions.  This patch
works for me.
Comment 12 H.J. Lu 2017-06-01 15:23:48 UTC 
Created attachment 131643 [details] [review]
An updated patch
Comment 13 Jani Nikula 2017-06-02 10:07:18 UTC 
(In reply to H.J. Lu from comment #12)
> Created attachment 131643 [details] [review] [review]
> An updated patch

Please send patches to intel-gfx@lists.freedesktop.org for review and discussion.
Comment 15 Paul Menzel 2017-06-20 11:57:27 UTC 
The label is correct with Linux 4.11.6 on my system.

```
$ more /proc/version
Linux version 4.11.6.mx64.160 (root@luxuria.molgen.mpg.de) (gcc version 5.3.0 (GCC) ) #1 SMP Mon Jun 19 11:49:25 CEST 2017
$ xrandr
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192
HDMI-1 disconnected (normal left inverted right x axis y axis)
DP-1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 698mm x 392mm
   3840x2160      30.0 +   30.3  
   1920x1200      59.9  
   1920x1080      60.0*    60.0     50.0     59.9     24.0     24.0  
   1920x1080i     60.1     50.0     60.0  
   1600x1200      60.0  
   1680x1050      60.0  
   1280x1024      75.0     60.0  
   1280x800       59.8  
   1152x864       75.0  
   1280x720       60.0     50.0     59.9  
   1024x768       75.0     60.0  
   800x600        75.0     60.3  
   720x576        50.0  
   720x480        60.0     59.9  
   640x480        75.0     60.0     59.9  
   720x400        70.1  
HDMI-2 disconnected (normal left inverted right x axis y axis)
DP-2 disconnected (normal left inverted right x axis y axis)
HDMI-3 disconnected (normal left inverted right x axis y axis)
DP-3 disconnected (normal left inverted right x axis y axis)
```

I still need to test latest drm-tip and the patch.
Comment 16 Paul Menzel 2017-06-22 14:52:09 UTC 
I am also unable to reproduce the problem with drm-tip from today.

```
$ git log --oneline -1
f006697 drm-tip: 2017y-06m-22d-11h-59m-42s UTC integration manifest
```

I’ll therefore change the status to *resolved*.

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