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#1 2023-01-17 12:52:25

grealish
Member
Registered: 2017-01-07
Posts: 9

DisplayPort MST issue - detected but not displaying - Intel 620

Hello All,

I have ARCH running both LTS (5.15.87-1)  and mainline  (6.1.5-arch2-1 #1 SMP PREEMPT_DYNAMIC) which is having trouble driving two monitors over a USB-C based monitor with DP 1.2 with a chained setup of DP across to a second monitor

The setup works on Windows 11, but with Linux on this Lenovo P43s, it's not, am I missing something in modprobe and/or X11 .conf

I've dumped some info here to help,
inxi -aG

[root@-santis ~]# inxi -aG
Graphics:
  Device-1: Intel WhiskeyLake-U GT2 [UHD Graphics 620] driver: i915 v: kernel arch: Gen-9.5
    process: Intel 14nm built: 2016-20 ports: active: DP-5 off: DP-3,eDP-1 empty: DP-1, DP-2,
    HDMI-A-1, HDMI-A-2 bus-ID: 00:02.0 chip-ID: 8086:3ea0 class-ID: 0300
  Device-2: Chicony ThinkPad T490 Webcam type: USB driver: uvcvideo bus-ID: 1-8:6
    chip-ID: 04f2:b681 class-ID: 0e02 serial: 0001
  Display: server: X.org v: 1.21.1.6 with: Xwayland v: 22.1.7 compositor: gnome-shell v: 43.2
    driver: X: loaded: intel unloaded: modesetting alternate: fbdev,vesa dri: i965 gpu: i915
    tty: 142x75
  Monitor-1: DP-3 model: Dell U2722DE serial: DC8H8H3 built: 2022 res: 2560x1440 dpi: 109
    gamma: 1.2 size: 597x336mm (23.5x13.23") diag: 685mm (27") ratio: 16:9 modes: max: 2560x1440
    min: 720x400
  Monitor-2: DP-5 model: Dell U2722D serial: 8HG1T83 built: 2021 res: 2560x1440 dpi: 109
    gamma: 1.2 size: 597x336mm (23.5x13.23") diag: 685mm (27") ratio: 16:9 modes: max: 2560x1440
    min: 720x400
  Monitor-3: eDP-1 model: ChiMei InnoLux 0x14f2 built: 2018 res: 1920x1080 dpi: 158 gamma: 1.2
    size: 309x173mm (12.17x6.81") diag: 354mm (13.9") ratio: 16:9 modes: 1920x1080
  API: OpenGL Message: GL data unavailable in console and glxinfo missing.

nothing in modprobe.d and the xf86 version

[root@md1nkv0c-santis ~]# ls /etc/modprobe.d/iwlwifi.conf ^C
[root@md1nkv0c-santis ~]# pacman -Qi xf
xf86-input-evdev      xf86-input-libinput   xf86-input-synaptics  xf86-video-intel      xfsprogs              
xf86-input-keyboard   xf86-input-mouse      xf86-input-wacom      xfconf                
[root@-santis ~]# pacman -Qi xf86-video-intel 
Name            : xf86-video-intel
Version         : 1:2.99.917+916+g31486f40-2
Description     : X.org Intel i810/i830/i915/945G/G965+ video drivers
Architecture    : x86_64
URL             : [url]https://01.org/linuxgraphics[/url]
Licenses        : custom
Groups          : xorg-drivers
Provides        : xf86-video-intel-uxa  xf86-video-intel-sna
Depends On      : mesa  libxvmc  pixman  xcb-util>=0.3.9  systemd-libs
Optional Deps   : libxrandr: for intel-virtual-output [installed]
                  libxinerama: for intel-virtual-output [installed]
                  libxcursor: for intel-virtual-output [installed]
                  libxtst: for intel-virtual-output [installed]
                  libxss: for intel-virtual-output [installed]
Required By     : None
Optional For    : optimus-manager
Conflicts With  : xorg-server<21.1.1  X-ABI-VIDEODRV_VERSION<25  X-ABI-VIDEODRV_VERSION>=26  xf86-video-intel-sna  xf86-video-intel-uxa
                  xf86-video-i810  xf86-video-intel-legacy
Replaces        : xf86-video-intel-uxa  xf86-video-intel-sna
Installed Size  : 2.16 MiB
Packager        : Andreas Radke <andyrtr@archlinux.org>
Build Date      : Sun 07 Nov 2021 12:00:37 CET
Install Date    : Tue 25 Jan 2022 13:15:39 CET
Install Reason  : Explicitly installed
Install Script  : Yes
Validated By    : Signature

xrandr and intel xconf

[root@-santis ~]# cat /etc/X11/xorg.conf.d/01-intel.conf 

```
➜   xrandr --prop
Screen 0: minimum 8 x 8, current 5120 x 1440, maximum 32767 x 32767
eDP1 connected (normal left inverted right x axis y axis)
	_MUTTER_PRESENTATION_OUTPUT: 0 
	EDID: 
		00ffffffffffff000daef21400000000
		161c0104a51f117802ee95a3544c9926
		0f505400000001010101010101010101
		010101010101363680a0703820402e1e
		240035ad10000018000000fe004e3134
		304843472d4751320a20000000fe0043
		4d4e0a202020202020202020000000fe
		004e3134304843472d4751320a2000bb
	BACKLIGHT: 19442 
		range: (0, 24242)
	Backlight: 19442 
		range: (0, 24242)
	scaling mode: Full aspect 
		supported: Full, Center, Full aspect
	Colorspace: Default 
		supported: Default, RGB_Wide_Gamut_Fixed_Point, RGB_Wide_Gamut_Floating_Point, opRGB, DCI-P3_RGB_D65, BT2020_RGB, BT601_YCC, BT709_YCC, XVYCC_601, XVYCC_709, SYCC_601, opYCC_601, BT2020_CYCC, BT2020_YCC
	max bpc: 12 
		range: (6, 12)
	Broadcast RGB: Automatic 
		supported: Automatic, Full, Limited 16:235
	panel orientation: Normal 
		supported: Normal, Upside Down, Left Side Up, Right Side Up
	link-status: Good 
		supported: Good, Bad
	non-desktop: 0 
		range: (0, 1)
   1920x1080     60.00 +  59.93  
   1680x1050     59.88  
   1400x1050     59.98  
   1600x900      60.00    59.95    59.82  
   1280x1024     60.02  
   1400x900      59.96    59.88  
   1280x960      60.00  
   1368x768      60.00    59.88    59.85  
   1280x800      59.81    59.91  
   1280x720      59.86    60.00    59.74  
   1024x768      60.00  
   1024x576      60.00    59.90    59.82  
   960x540       60.00    59.63    59.82  
   800x600       60.32    56.25  
   864x486       60.00    59.92    59.57  
   640x480       59.94  
   720x405       59.51    60.00    58.99  
   640x360       59.84    59.32    60.00  
DP1 disconnected (normal left inverted right x axis y axis)
	_MUTTER_PRESENTATION_OUTPUT: 0 
	HDCP Content Type: HDCP Type0 
		supported: HDCP Type0, HDCP Type1
	Content Protection: Undesired 
		supported: Undesired, Desired, Enabled
	Colorspace: Default 
		supported: Default, RGB_Wide_Gamut_Fixed_Point, RGB_Wide_Gamut_Floating_Point, opRGB, DCI-P3_RGB_D65, BT2020_RGB, BT601_YCC, BT709_YCC, XVYCC_601, XVYCC_709, SYCC_601, opYCC_601, BT2020_CYCC, BT2020_YCC
	max bpc: 12 
		range: (6, 12)
	Broadcast RGB: Automatic 
		supported: Automatic, Full, Limited 16:235
	audio: auto 
		supported: force-dvi, off, auto, on
	subconnector: Unknown 
		supported: Unknown, VGA, DVI-D, HDMI, DP, Wireless, Native
	link-status: Good 
		supported: Good, Bad
	non-desktop: 0 
		range: (0, 1)
DP1-1 connected primary 2560x1440+0+0 (normal left inverted right x axis y axis) 600mm x 340mm
	EDID: 
		00ffffffffffff0010ac2d424c343842
		121f0104b53c22783eee95a3544c9926
		0f5054a54b00714f8180a940d1c00101
		010101010101565e00a0a0a029503020
		350055502100001a000000ff00384847
		315438330a2020202020000000fc0044
		454c4c205532373232440a20000000fd
		00314c1e5a19010a2020202020200101
		020319f14c90040302011112131f2021
		2223097f0783010000023a801871382d
		40582c450055502100001e7e3900a080
		381f4030203a0055502100001a011d00
		7251d01e206e28550055502100001ebf
		1600a08038134030203a005550210000
		1a000000000000000000000000000000
		00000000000000000000000000000006
	max bpc: 12 
		range: (6, 12)
	HDCP Content Type: HDCP Type0 
		supported: HDCP Type0, HDCP Type1
	Content Protection: Undesired 
		supported: Undesired, Desired, Enabled
	Broadcast RGB: Automatic 
		supported: Automatic, Full, Limited 16:235
	audio: auto 
		supported: force-dvi, off, auto, on
	non-desktop: 0 
		range: (0, 1)
	link-status: Good 
		supported: Good, Bad
	_MUTTER_PRESENTATION_OUTPUT: 0 
   2560x1440     59.95*+
   2048x1080     60.00    24.00  
   1920x1080     60.00    50.00    59.94    30.00    25.00    24.00    29.97    23.98  
   1600x1200     60.00  
   1280x1024     75.02    60.02  
   1152x864      75.00  
   1280x720      60.00    50.00    59.94  
   1024x768      75.03    60.00  
   800x600       75.00    60.32  
   720x576       50.00  
   720x480       60.00    59.94  
   640x480       75.00    60.00    59.94  
   720x400       70.08  
DP1-8 connected (normal left inverted right x axis y axis)
	EDID: 
		00ffffffffffff0010ac31424c5a5354
		0c200104b53c22783eee95a3544c9926
		0f5054a54b00714f8180a9c0a940d1c0
		010101010101565e00a0a0a029503020
		350055502100001a000000ff00444338
		483848330a2020202020000000fc0044
		454c4c20553237323244450a000000fd
		00314c1e5a19010a2020202020200120
		020319f14c90040302011112131f2021
		2223097f0783010000023a801871382d
		40582c450055502100001e7e3900a080
		381f4030203a0055502100001a011d00
		7251d01e206e28550055502100001ebf
		1600a08038134030203a005550210000
		1a000000000000000000000000000000
		00000000000000000000000000000006
	max bpc: 12 
		range: (6, 12)
	HDCP Content Type: HDCP Type0 
		supported: HDCP Type0, HDCP Type1
	Content Protection: Undesired 
		supported: Undesired, Desired, Enabled
	Broadcast RGB: Automatic 
		supported: Automatic, Full, Limited 16:235
	audio: auto 
		supported: force-dvi, off, auto, on
	non-desktop: 0 
		range: (0, 1)
	link-status: Good 
		supported: Good, Bad
	_MUTTER_PRESENTATION_OUTPUT: 0 
   2560x1440     59.95 +
   2048x1080     60.00    24.00  
   1920x1080     60.00    50.00    59.94    30.00    25.00    24.00    29.97    23.98  
   1600x1200     60.00  
   1600x900      60.00  
   1280x1024     75.02    60.02  
   1152x864      75.00  
   1280x720      60.00    50.00    59.94  
   1024x768      75.03    60.00  
   800x600       75.00    60.32  
   720x576       50.00  
   720x480       60.00    59.94  
   640x480       75.00    60.00    59.94  
   720x400       70.08  
DP2 disconnected (normal left inverted right x axis y axis)
	HDCP Content Type: HDCP Type0 
		supported: HDCP Type0, HDCP Type1
	Content Protection: Undesired 
		supported: Undesired, Desired, Enabled
	Colorspace: Default 
		supported: Default, RGB_Wide_Gamut_Fixed_Point, RGB_Wide_Gamut_Floating_Point, opRGB, DCI-P3_RGB_D65, BT2020_RGB, BT601_YCC, BT709_YCC, XVYCC_601, XVYCC_709, SYCC_601, opYCC_601, BT2020_CYCC, BT2020_YCC
	max bpc: 12 
		range: (6, 12)
	Broadcast RGB: Automatic 
		supported: Automatic, Full, Limited 16:235
	audio: auto 
		supported: force-dvi, off, auto, on
	subconnector: Unknown 
		supported: Unknown, VGA, DVI-D, HDMI, DP, Wireless, Native
	link-status: Good 
		supported: Good, Bad
	non-desktop: 0 
		range: (0, 1)
DP2-1 disconnected (normal left inverted right x axis y axis)
	max bpc: 12 
		range: (6, 12)
	HDCP Content Type: HDCP Type0 
		supported: HDCP Type0, HDCP Type1
	Content Protection: Undesired 
		supported: Undesired, Desired, Enabled
	Broadcast RGB: Automatic 
		supported: Automatic, Full, Limited 16:235
	audio: auto 
		supported: force-dvi, off, auto, on
	link-status: Good 
		supported: Good, Bad
	non-desktop: 0 
		range: (0, 1)
DP2-2 disconnected (normal left inverted right x axis y axis)
	_MUTTER_PRESENTATION_OUTPUT: 0 
	max bpc: 12 
		range: (6, 12)
	HDCP Content Type: HDCP Type0 
		supported: HDCP Type0, HDCP Type1
	Content Protection: Undesired 
		supported: Undesired, Desired, Enabled
	Broadcast RGB: Automatic 
		supported: Automatic, Full, Limited 16:235
	audio: auto 
		supported: force-dvi, off, auto, on
	link-status: Good 
		supported: Good, Bad
	non-desktop: 0 
		range: (0, 1)
DP2-3 disconnected (normal left inverted right x axis y axis)
	max bpc: 12 
		range: (6, 12)
	HDCP Content Type: HDCP Type0 
		supported: HDCP Type0, HDCP Type1
	Content Protection: Undesired 
		supported: Undesired, Desired, Enabled
	Broadcast RGB: Automatic 
		supported: Automatic, Full, Limited 16:235
	audio: auto 
		supported: force-dvi, off, auto, on
	link-status: Good 
		supported: Good, Bad
	non-desktop: 0 
		range: (0, 1)
HDMI1 disconnected (normal left inverted right x axis y axis)
	HDCP Content Type: HDCP Type0 
		supported: HDCP Type0, HDCP Type1
	Content Protection: Undesired 
		supported: Undesired, Desired, Enabled
	max bpc: 12 
		range: (8, 12)
	content type: No Data 
		supported: No Data, Graphics, Photo, Cinema, Game
	Colorspace: Default 
		supported: Default, SMPTE_170M_YCC, BT709_YCC, XVYCC_601, XVYCC_709, SYCC_601, opYCC_601, opRGB, BT2020_CYCC, BT2020_RGB, BT2020_YCC, DCI-P3_RGB_D65, DCI-P3_RGB_Theater
	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
	link-status: Good 
		supported: Good, Bad
	non-desktop: 0 
		range: (0, 1)
HDMI2 disconnected (normal left inverted right x axis y axis)
	HDCP Content Type: HDCP Type0 
		supported: HDCP Type0, HDCP Type1
	Content Protection: Undesired 
		supported: Undesired, Desired, Enabled
	max bpc: 12 
		range: (8, 12)
	content type: No Data 
		supported: No Data, Graphics, Photo, Cinema, Game
	Colorspace: Default 
		supported: Default, SMPTE_170M_YCC, BT709_YCC, XVYCC_601, XVYCC_709, SYCC_601, opYCC_601, opRGB, BT2020_CYCC, BT2020_RGB, BT2020_YCC, DCI-P3_RGB_D65, DCI-P3_RGB_Theater
	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
	link-status: Good 
		supported: Good, Bad
	non-desktop: 0 
		range: (0, 1)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
	non-desktop: 0 
		supported: 0, 1

A similar issue that might help for context https://bbs.archlinux.org/viewtopic.php?id=210338
`

Last edited by grealish (2023-01-17 12:57:38)

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#2 2023-01-17 12:56:08

V1del
Forum Moderator
Registered: 2012-10-16
Posts: 18,187

Re: DisplayPort MST issue - detected but not displaying - Intel 620

Remove xf86-video-intel and check whether you can reproduce, and please use bbcode code tags instead of markdown for pasting outputs.

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#3 2023-01-17 12:57:06

grealish
Member
Registered: 2017-01-07
Posts: 9

Re: DisplayPort MST issue - detected but not displaying - Intel 620

wow that was quick! I was just fixing up my most wink
I'll give removing xf86-video-intel a removal and see how it goes, thanks

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#4 2023-01-17 23:25:59

grealish
Member
Registered: 2017-01-07
Posts: 9

Re: DisplayPort MST issue - detected but not displaying - Intel 620

unfortunately no look @v1del, purged xf86-video-intel and still can't get two of the external displays up, It detects them but won't turn both on, only laptop + 1x external, and either or,
any ideas to get more debug info out?

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#5 2023-01-18 12:06:57

Lone_Wolf
Member
From: Netherlands, Europe
Registered: 2005-10-04
Posts: 10,638

Re: DisplayPort MST issue - detected but not displaying - Intel 620

which is having trouble driving two monitors over a USB-C based monitor with DP 1.2 with a chained setup of DP across to a second monitor

Brand & model of your system/motherboard ?
Is the usb-c connection directly to a physical port on that system or through an external device ?


Disliking systemd intensely, but not satisfied with alternatives so focusing on taming systemd.


(A works at time B)  && (time C > time B ) ≠  (A works at time C)

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