Solved Linux doesn't detects monitor resolution after update

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karbono

karbono

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Hi there,

After I updated CachyOS (Arch) my 2nd monitor lost the resolution (2560x1440@75hz) and now it only show 1920x1080@60.

I didn't care about the 75hz but the resolution it's needed for sure.

I research about that and found that was probably about a NVIDIA driver update. After notices that, I taken advantage of that problem and reinstalled CachyOS with Plasma instead Hyprland. While the ISO was booted the monitor showed the higher res (2560...) so that I think that confirms my suspicious about the NVIDIA driver.

May I need just to downgrade the version? I tried with xrandr and similar to fix it but didn't works.

Thanks in advance!
 


Which driver package do you have installed and which one was the working version before you updated?
Code: 
pacman -Qs nvidia

And can you share the output of the following?
Code: 
grep  -i modules /etc/mkinitcpio.conf
 
f33dm3bits said:
Which driver package do you have installed and which one was the working version before you updated?
Click to expand...
Didn't checked it.. I think it was 580.XXX....
f33dm3bits said:
Code: 
pacman -Qs nvidia
Click to expand...
Code: 
local/egl-gbm 1.1.2.1-1.1
    The GBM EGL external platform library
local/egl-wayland 4:1.1.20-1.1
    EGLStream-based Wayland external platform
local/egl-x11 1.0.3-1.1
    NVIDIA XLib and XCB EGL Platform Library
local/ffnvcodec-headers 13.0.19.0-1
    FFmpeg version of headers required to interface with Nvidias codec APIs
local/lib32-libvdpau 1.5-3
    Nvidia VDPAU library
local/lib32-nvidia-utils 580.105.08-1.1
    NVIDIA drivers utilities (32-bit)
local/lib32-opencl-nvidia 580.105.08-1.1
    OpenCL implemention for NVIDIA (32-bit)
local/libva-nvidia-driver 0.0.14-1.1
    VA-API implementation that uses NVDEC as a backend
local/libvdpau 1.5-3.1
    Nvidia VDPAU library
local/libxnvctrl 580.105.08-1
    NVIDIA NV-CONTROL X extension
local/linux-cachyos-lts-nvidia-open 6.12.56-3
    nvidia open modules of 580.105.08 driver for the linux-cachyos-lts kernel
local/linux-cachyos-nvidia-open 6.17.7-3
    nvidia open modules of 580.105.08 driver for the linux-cachyos kernel
local/linux-firmware-nvidia 1:20251021-1
    Firmware files for Linux - Firmware for NVIDIA GPUs and SoCs
local/nvidia-prime 1.0-5
    NVIDIA Prime Render Offload configuration and utilities
local/nvidia-settings 580.105.08-1
    Tool for configuring the NVIDIA graphics driver
local/nvidia-utils 580.105.08-1.1
    NVIDIA drivers utilities
local/opencl-nvidia 580.105.08-1.1
    OpenCL implemention for NVIDIA

f33dm3bits said:
Code: 
grep  -i modules /etc/mkinitcpio.conf
Click to expand...
Code: 
# MODULES
# The following modules are loaded before any boot hooks are
# run.  Advanced users may wish to specify all system modules
#     MODULES=(usbhid xhci_hcd)
MODULES=(crc32c)
# modules and scripts added to the image, and what happens at boot time.
# 'udev' is _required_ in order to automatically load modules
# 'filesystems' is _required_ unless you specify your fs modules in MODULES
##   This setup specifies all modules in the MODULES setting above.
##   This setup will autodetect all modules for your system and should
# MODULES_DECOMPRESS
# Decompress loadable kernel modules and their firmware during initramfs
#MODULES_DECOMPRESS="no"

Maybe should I add the last thing that you told me in mkinitcpio.conf file? I will see the other thread about Cachy that you helped me.
 
karbono said:
Didn't checked it.. I think it was 580.XXX....
Click to expand...
I guess that would be since that's what I'm using.
Code: 
local/nvidia-open-dkms 580.95.05-1
Since I know CachyOS is faster with updates than Arch Linux is.

Which kernel version are you using?
Code: 
uname -a
 
f33dm3bits said:
I guess that would be since that's what I'm using.
Code: 
local/nvidia-open-dkms 580.95.05-1
Since I know CachyOS is faster with updates than Arch Linux is.

Which kernel version are you using?
Code: 
uname -a
Click to expand...

Kernel version:
Linux pulse 6.17.7-3-cachyos #1 SMP PREEMPT_DYNAMIC Wed, 05 Nov 2025 02:29:51 +0000 x86_64 GNU/Linux

Do you mean that there's a newer version of the nvidia-open-dkms driver in Arch?
 
karbono said:
Do you mean that there's a newer version of the nvidia-open-dkms driver in Arch?
Click to expand...
Yes which you are using, since I'm using a different version so Arch Linux is behind.
local/linux-cachyos-nvidia-open 6.17.7-3 nvidia open modules of 580.105.08 driver for the linux-cachyos kernel
Click to expand...

I have an idea what you can try and something to improve. If I were you I would switch to the dkms version of the driver it works for all kernels and with each update it compiles a new kernel module for you. But first do this.

First install the dkms nvidia package, it will ask you to remove the ones conflicting.
Code: 
sudo pacman -S nvidia-open-dkms

Then edit /etc/mkinitcpio.conf make that earlier line shared look like this.
Code: 
MODULES=(crc32c nvidia nvidia_modeset nvidia_uvm nvidia_drm)

Then run:
Code: 
sudo mkinitcpio -P

Try rebooting and see if it's an improvement?
 
f33dm3bits said:
Yes which you are using, since I'm using a different version so Arch Linux is behind.


I have an idea what you can try and something to improve. If I were you I would switch to the dkms version of the driver it works for all kernels and with each update it compiles a new kernel module for you. But first do this.

First install the dkms nvidia package, it will ask you to remove the ones conflicting.
Code: 
sudo pacman -S nvidia-open-dkms

Then edit /etc/mkinitcpio.conf make that earlier line shared look like this.
Code: 
MODULES=(crc32c nvidia nvidia_modeset nvidia_uvm nvidia_drm)

Then run:
Code: 
sudo mkinitcpio -P

Try rebooting and see if it's an improvement?
Click to expand...
Doesn't works, can't change the resolution.
Thanks!
 
f33dm3bits said:
Is the nvidia-open-dkms still installed now?
Click to expand...
Yes:

Code: 
local/egl-gbm 1.1.2.1-1.1
    The GBM EGL external platform library
local/egl-wayland 4:1.1.20-1.1
    EGLStream-based Wayland external platform
local/egl-x11 1.0.3-1.1
    NVIDIA XLib and XCB EGL Platform Library
local/ffnvcodec-headers 13.0.19.0-1
    FFmpeg version of headers required to interface with Nvidias codec APIs
local/lib32-libvdpau 1.5-3
    Nvidia VDPAU library
local/lib32-nvidia-utils 580.105.08-1.1
    NVIDIA drivers utilities (32-bit)
local/lib32-opencl-nvidia 580.105.08-1.1
    OpenCL implemention for NVIDIA (32-bit)
local/libva-nvidia-driver 0.0.14-1.1
    VA-API implementation that uses NVDEC as a backend
local/libvdpau 1.5-3.1
    Nvidia VDPAU library
local/libxnvctrl 580.105.08-1
    NVIDIA NV-CONTROL X extension
local/linux-firmware-nvidia 1:20251021-1
    Firmware files for Linux - Firmware for NVIDIA GPUs and SoCs
local/nvidia-open-dkms 580.105.08-1.1
    NVIDIA open kernel modules - module sources
local/nvidia-prime 1.0-5
    NVIDIA Prime Render Offload configuration and utilities
local/nvidia-settings 580.105.08-1
    Tool for configuring the NVIDIA graphics driver
local/nvidia-utils 580.105.08-1.1
    NVIDIA drivers utilities
local/opencl-nvidia 580.105.08-1.1
    OpenCL implemention for NVIDIA

I needed to install linux-headers before it.
 
f33dm3bits said:
Try downgrading the nvidia packages to previous driver version 580.95.05-1
Click to expand...
If that doesn't work download those packages version from https://packages.cachyos.org and then install them manually with, but be sure they matching from the same repo you have installed them from now since cachyos has several different optimized repos.
Code: 
sudo pacman -U package1.pkg.tar.zst package2.pkg.tar.zst package3.pkg.tar.zst
 
f33dm3bits said:
Try downgrading the nvidia packages to previous driver version 580.95.05-1
sudo downgrade nvidia-open-dkms nvidia-utils lib32-nvidia-utils
Click to expand...
You will probably need to downgrade the other packages with version 580.105 as well:
lib32-opencl-nvidia
opencl-nvidia
libxnvctrl
nvidia-settings
 
I actually forgot to mention something useful. You should still have the old package versions on your system under /var/cache/pacman/pkg. You can go to that directory and reinstall them like this with the old packages.
f33dm3bits said:
Code:
sudo pacman -U package1.pkg.tar.zst package2.pkg.tar.zst package3.pkg.tar.zst
Click to expand...
Code: 
ls /var/cache/pacman/pkg |  grep 580.95.05
Then reinstall those, make sure you select reinstall the nvidia-open-dkms version and not the other versions.
 
karbono said:
The downgrade worked perfectly! Thanks so much dude.
Click to expand...
Good to know that it worked, will see what happens for me when I get the upgraded packages. Did you downgrade all the packages with the new version numbers?

f33dm3bits said:
You will probably need to downgrade the other packages with version 580.105 as well:
lib32-opencl-nvidia
opencl-nvidia
libxnvctrl
nvidia-settings
Click to expand...
That's from looking at the output your gave earlier.

f33dm3bits said:
You should still have the old package versions on your system under /var/cache/pacman/pkg.
Click to expand...
When you use the "downgrade" command it will also listed the packages that are still in your local cache: /var/cache/pacman/pkg

karbono said:
Thanks again, you're a boss!
Click to expand...
Glad to have helped out!
 
f33dm3bits said:
Good to know that it worked, will see what happens for me when I get the upgraded packages. Did you downgrade all the packages with the new version numbers?
Click to expand...
I've downgraded all the packages that the console asked me with to the version 580.95.05-1 as you mentioned.
f33dm3bits said:
That's from looking at the output your gave earlier.
Click to expand...
Didn't notice that packages would be necesasry also, lol.

About the packages in cache I've seen a lot but this is a fresh install... I erased the entire disk this morning, could be possible?

Thanks again!!
 
karbono said:
About the packages in cache I've seen a lot but this is a fresh install... I erased the entire disk this morning, could be possible?
Click to expand...
Yeah than you wouldn't have had them in your cache, but either way the "downgrade" command is the easiest way to downgrade packages, as it looks in your current cache as well.

karbono said:
Thanks again!!
Click to expand...
Glad to have helped out and now you know how to downgrade something next time yourself.
 
f33dm3bits said:
Glad to have helped out and now you know how to downgrade something next time yourself.
Click to expand...
The funny part was that I re-installed the system because that annoyed me and I have installed a lot of packages about wine, etc. doing tests with games but I was letting it go until today :D

I've used it one time at least, but when I figured that NVIDIA driver was the problem was late to stop the new installation :D
 
f33dm3bits said:
You could have just manually removed those with pacman and remove orphaned packages if there were any.
Click to expand...
Yes I know... but I was lazy to look for it and prefered to start again and keep the system clean. Actually installed Plasma instead Hyprland and also looks amazing. Didn't tried it until today.

Now I'll care about what I'm installing ^^.
 
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