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#1 2020-11-08 05:33:42

ErdosOrGauss
Member
Registered: 2017-06-21
Posts: 40

[SOLVED] Output Isn't Detected for External Monitor

Hi all,

I'm not sure if this should be posted under 'Newbie Corner,' 'Kernel and Hardware,' or 'Laptop Issues'. So, if it needs to be moved, please let me know. Although, I will say this issue feels rather newbie-esque.

So, I've been running Arch for awhile on my laptop (ThinkPad P53) and my new job bought me some hardware to work from home. (I'm sure you can see where this is going.) I have been able to connect my mouse and keyboard, however, I cannot get my external monitor to detect the output from my HDMI cord.

I've done some digging around on the following pages: the xrandr wiki, the multihead wiki, the extreme multihead wiki, the NVIDIA wiki, and this stack exchange post that had seemed relevant, among others.

My issue is that I cannot get the monitor to detect the output of the HDMI cord. Every single time I run $ xrandr --output HDMI-1 --auto (found on the xrandr wiki), my session restarts and there is no output from my HDMI, still.

At first, I thought my HDMI cord wasn't being detected but the output from xrandr below shows this is not the case. So, I wonder if, for some reason, there isn't any output being sent -- but I'm not sure, hence why I'm here.

One thing I feel I should note is that I am running i3. I don't know why but I feel it is necessary to note that.

Overall, I've put a good chunk of time into this (~8/9 hours) and can't seem to figure it out and/or get a good lead on what to tinker with, so I've come here. I don't know if I'm simply missing a wiki or a link, but please feel free to direct me to it/one if I am; I'd actually love that! Any help would be deeply appreciated.

I've posted the output from a few different functions/files I've run/dealt with throughout this process that could be relevant/helpful:

xrandr

Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 32767 x 32767
eDP1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 340mm x 190mm
   1920x1080     60.01*+  59.93  
   1680x1050     59.95    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  
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
DP-1-0 disconnected
DP-1-1 disconnected
DP-1-2 disconnected
HDMI-1-0 connected
   1920x1080     60.00 +  59.94    50.00  
   1680x1050     59.95  
   1440x900      59.89  
   1280x1024     75.02    60.02  
   1280x960      60.00  
   1280x720      60.00    59.94    50.00  
   1024x768      75.03    70.07    60.00  
   800x600       75.00    72.19    60.32    56.25  
   720x576       50.00  
   720x480       59.94  
   640x480       75.00    72.81    59.93    59.94  
DP-1-3 disconnected
  1680x1050 (0x3be) 146.250MHz -HSync +VSync
        h: width  1680 start 1784 end 1960 total 2240 skew    0 clock  65.29KHz
        v: height 1050 start 1053 end 1059 total 1089           clock  59.95Hz
  1280x1024 (0x3c4) 108.000MHz +HSync +VSync
        h: width  1280 start 1328 end 1440 total 1688 skew    0 clock  63.98KHz
        v: height 1024 start 1025 end 1028 total 1066           clock  60.02Hz
  1280x960 (0x3c7) 108.000MHz +HSync +VSync
        h: width  1280 start 1376 end 1488 total 1800 skew    0 clock  60.00KHz
        v: height  960 start  961 end  964 total 1000           clock  60.00Hz
  1024x768 (0x3d0) 65.000MHz -HSync -VSync
        h: width  1024 start 1048 end 1184 total 1344 skew    0 clock  48.36KHz
        v: height  768 start  771 end  777 total  806           clock  60.00Hz
  800x600 (0x3d7) 40.000MHz +HSync +VSync
        h: width   800 start  840 end  968 total 1056 skew    0 clock  37.88KHz
        v: height  600 start  601 end  605 total  628           clock  60.32Hz
  800x600 (0x3d8) 36.000MHz +HSync +VSync
        h: width   800 start  824 end  896 total 1024 skew    0 clock  35.16KHz
        v: height  600 start  601 end  603 total  625           clock  56.25Hz
  640x480 (0x3dc) 25.175MHz -HSync -VSync
        h: width   640 start  656 end  752 total  800 skew    0 clock  31.47KHz
        v: height  480 start  490 end  492 total  525           clock  59.94Hz

The file generated by running nvidia-xconfig:

# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig:  version 455.23.04

Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0"
    InputDevice    "Keyboard0" "CoreKeyboard"
    InputDevice    "Mouse0" "CorePointer"
EndSection

Section "Files"
EndSection

Section "InputDevice"
    # generated from default
    Identifier     "Mouse0"
    Driver         "mouse"
    Option         "Protocol" "auto"
    Option         "Device" "/dev/psaux"
    Option         "Emulate3Buttons" "no"
    Option         "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"
    # generated from default
    Identifier     "Keyboard0"
    Driver         "kbd"
EndSection

Section "Monitor"
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "Unknown"
    Option         "DPMS"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

A portion of an xorg.conf file that failed (this is only a part of it and the rest of it may be found directly above)

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BusID "PCI:01:00:0" #From stack exchange
    Option "NoLogo" "true" #From stack exchange
    Option "UseEDID" "true" #From stack exchange
    Option "ConnectedMonitor" "DFP" #from stack exchange
EndSection

#the following section is from stack exchange
Section "Files"
	ModulePath "/usr/lib/nvidia"
	ModulePath "/usr/lib/xorg/modules"
EndSection 
#no longer from stack exchange 

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

Last edited by ErdosOrGauss (2020-11-08 06:03:17)

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#2 2020-11-08 06:05:23

ErdosOrGauss
Member
Registered: 2017-06-21
Posts: 40

Re: [SOLVED] Output Isn't Detected for External Monitor

It turns out that the second addition I had listed to the "nvidia-settings" file that is automatically generated had somehow messed it up. However, solely loading the default auto-generated file got the monitor to present my monitor. Now I'm working on getting it to be a "TwinView" configuration (which, if I get too stuck, will require another thread). But, basically, the solution was to not be an idiot and just do what you're supposed to try, first.

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