Niggling trait of lightdm

mrmazda · 01-17-2022, 04:04 PM

Quote:

Originally Posted by makem

Code:

    Option         "metamodes" "DP-0: 1920x1080_144 +0+0, HDMI-0: 1920x1080_60 +1920+0"

See if this works:

Code:

# /etc/X11/xorg.conf
Section "Device"
	Identifier      "nvGPU"
	Option  "Monitor-DP-0"   "priDP"
	Option  "Monitor-HDMI-0" "secHDMI"
EndSection
Section "Monitor"
        Identifier	"priDP"
        Option		"Primary" "true"
EndSection
Section "Monitor"
        Identifier	"secHDMI
        Option		"right-of" "priDP"
EndSection
Section "Screen"
        Identifier	"ScreenLeft"
        Device		"nvGPU"
        Monitor		"priDP"
EndSection
Section "Screen"
        Identifier	"ScreenRight"
        Device		"nvGPU"
        Monitor		"secHDMI"
EndSection

makem · 01-17-2022, 04:11 PM

Quote:

Originally Posted by mrmazda

See if this works:

Code:

# /etc/X11/xorg.conf
Section "Device"
	Identifier      "nvGPU"
	Option  "Monitor-DP-0"   "priDP"
	Option  "Monitor-HDMI-0" "secHDMI"
EndSection
Section "Monitor"
        Identifier	"priDP"
        Option		"Primary" "true"
EndSection
Section "Monitor"
        Identifier	"secHDMI
        Option		"right-of" "priDP"
EndSection
Section "Screen"
        Identifier	"ScreenLeft"
        Device		"nvGPU"
        Monitor		"priDP"
EndSection
Section "Screen"
        Identifier	"ScreenRight"
        Device		"nvGPU"
        Monitor		"secHDMI"
EndSection

Do you mean, enter that alone in xorg.conf or merge it?

Edit:
I thought rather than wait I would try entering that code into xorg.conf just as it was. After a reboot the secondary monitor had the sign-in, not the primary, ie. as it has always been, no change.

I still feel xorg.conf has no bearing on anything, blank, self edited or prepared by nvidia.

mrmazda · 01-17-2022, 04:51 PM

You could uninstall NVidia's drivers. If that fixes it, even if an xorg.conf similar to those I provided here is necessary, you know who/what to blame. If it doesn't, report a bug to LightDM developers. Installing SDDM could be another option, as might be other distros, tested via their live media, which may point to Ubuntu rather than LightDM itself.

makem · 01-18-2022, 05:54 AM

Quote:

Originally Posted by mrmazda

You could uninstall NVidia's drivers. If that fixes it, even if an xorg.conf similar to those I provided here is necessary, you know who/what to blame. If it doesn't, report a bug to LightDM developers. Installing SDDM could be another option, as might be other distros, tested via their live media, which may point to Ubuntu rather than LightDM itself.

As I said earlier GDM gets it right so imo it's LightDM where the problem lies so I will maybe raise a bug.

Thank you for your input.