Dual-monitor problems with NVIDIA

[TriMoon]

Hi and welcome to the forum

[HowTo] Provide System Information

This tutorial is superseded by this one. Remember all Tutorials are wiki posts that can be edited by TL2 (Trust Level 2) members and above. Welcome to Manjaro! To allow all of us helpful people on this forum TO HELP YOU, we need some basic information about your system. This probably means you described the symptoms of your problem, but now we need some more information to know where the origin of your issue is exactly. Someone else probably linked you to…

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@makisgr

First I save the nvidia configuration from nvidia-settings but after rebooting the settings are gone.I have tried all the ways mentioned in the AUR wiki but nothing worked.

1. Provide your configuration inside a code block here as explained in that article at top of my reply.
2. Where exactly are you saving the configuration (provide the exact pathname)
3. How exactly are you making the Xserver load that configuration.

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@makisgr

The second problem is the resolution of the 2nd display.The display supports up to 1920x1080 but nvidia drivers are detecting 1280x1024 as max resolution.I tried to change it through the config but it didn’t worked.The problem seems to be with the adapter and linux compatibility.When I tried changing settings I setted both ViewPortIn and Viewportout resoloutions to 1920x1080.But after applying settings the ViewPortOut resolution is still stuck at 1280x1024.So what am I doing wrong?

You could try to add these in the [Device] section of your xconfig:

Option         "ModeValidation" "AllowNonEdidModes"
Option         "ModeDebug" "true"

The first will allow to use modes that are not provided by the EDID of your monitor.
The second will log all modes the xserver is considering and/or using inside the /var/log/Xorg.0.log file.
More flags that you can check are in the documentation that is installed together with your driver under /usr/share/doc/nvidia