NVIDIA driver doesn't get right resolution for monitor / detect other

archdotatuna · 2020-03-11 14:55:55

Hello, this is my first Arch install, I am having a problem where my NVIDIA driver is not able to get the proper resolution for my monitor or detect my second monitor at all.
My GPU is a GP104 GTX 1070 Ti, I am dual booting with Windows 10/ Arch SDDM plasma kdem with two monitors, an Acer 24' 1080p 144hz and a LG 27' 4k 60hz.
I installed the NVIDIA driver with "pacman -S nvidia"
Here is a linux hardware probe from "hw-probe"
https://linux-hardware.org/?probe=b499aa651f

During my install, I was unable to get my display manager sddm and my desktop environment to work/boot in, until I read on a forum post to remove /etc/X11/xorg.conf , as a user stated it was no longer necessary. Removing this file worked great, and I was able to sign in my plasma kde desktop for the first time with "startx".
Since getting into plasma I have tried to make it work as intended, but every time I use "nvidia-xconfig" or something else that makes that xorg.conf file, and I reboot I lose the ability to login to my desktop. I am unsure if this is causing my problem, but I can not think of anything else irregular I did from the arch install wiki.

I have tried some ways to get the the intended resolution (1920 x 1080) working on my current monitor, but run into a similar error each time.

With arandr, I get the error:
Gdk-CRITICAL **: 09:46:59.602: gdk_atom_intern: assertion 'atom_name != NULL' failed
/usr/lib/python3.8/site-packages/screenlayout/xrandr.py:78: UserWarning: XRandR wrote to stderr, but did not report an error (Message was: b'xrandr: Failed to get size of gamma for output default\n')

I have also tried using the xrandr, (with --newmode and -addmode commands) which gives this error
'xrandr: Failed to get size of gamma for output default\n'

I am sorry I did not use the paste bin, but I had another similar error and am hoping the fix to this helps that as well.

V1del · 2020-03-11 15:01:56

What kind of modes are you trying to add and why? Also if whatever was in your xorg.conf and actually worked correctly I don't see the need to remove it, it just isn't generally necessary.

Maybe post in [ code ] [ /code ] tags without the spaces the current output of

xrandr -q

without having done any other own attempts at configuration. and then clarify what you're actually trying to do.

Last edited by V1del (2020-03-11 15:02:18)

archdotatuna · 2020-03-11 22:06:28

I am trying to add the modes for the proper resolution of my screen, and also get my hardware to recognize the second monitor. As per my second paragraph, I stated that I was never able to start into my desktop environment while the Xorg.conf file was present. Whenever the xorg.conf file is present, startx will not work and I cannot use SDDM/Plasma. For me this meant what was in my xorg.conf did not work correctly, but I am new, so not entirely if I am leaving anything out.
I have used the command

cvt 1920 1080 60

Taking the modeline from this output, I have then tried

xrandr --newmode "1080p"  173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync

which throws me this error

xrandr: Failed to get size of gamma for output default

Error code for xrandr -q

xrandr: Failed to get size of gamma for output default
Screen 0: minimum 640 x 480, current 1024 x 768, maximum 1024 x 768
default connected 1024x768+0+0 0mm x 0mm
   1024x768       0.00* 
   800x600        0.00  
   640x480        0.00  
  1080p (0x3bf) 173.000MHz -HSync +VSync
        h: width  1920 start 2048 end 2248 total 2576 skew    0 clock  67.16KHz
        v: height 1080 start 1083 end 1088 total 1120           clock  59.96Hz

Last edited by archdotatuna (2020-03-11 22:14:18)

seth · 2020-03-12 06:25:12

You're either running on the VESA driver or some emulation. Please post your xorg log and the system journal.
Stop all efforts to add the resolution, that's time waste.

Arch Linux

#1 2020-03-11 14:55:55

NVIDIA driver doesn't get right resolution for monitor / detect other

#2 2020-03-11 15:01:56

Re: NVIDIA driver doesn't get right resolution for monitor / detect other

#3 2020-03-11 22:06:28

Re: NVIDIA driver doesn't get right resolution for monitor / detect other

#4 2020-03-12 06:25:12

Re: NVIDIA driver doesn't get right resolution for monitor / detect other

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