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Premise: like many other users, I have also encountered the following issue which has already been documented here: Can't use Wayland with Nvidia 510 drivers on Ubuntu 22.04 LTS although I am unsure whether it can be related to the issue in this post (i.e. whether I would not have run into issues with refresh rates if Wayland was working correctly as it should be the default with 22.04)

I completed a vanilla installation of the latest stable Ubuntu LTS (22.04) on a dual-boot (Windows 11) and dual-monitor setup (native 4k 60hz and external 3440x1440 100hz) and I have since been unable to select refresh rates higher than 50hz on my external monitor: Displays settings NVIDIA settings

I have already installed all of the proprietary drivers suggested during the Ubuntu installation process, including the latest NVIDIA 510.x drivers for my system, I also use high-bandwidth HDMI cables that have always allowed to operate the external monitor at 100hz on Windows 11 without issue

I have noticed that past Ubuntu versions exhibited similar behaviors for some users with regards to external monitors, however I have been unable to use their solutions. In particular, I have tried the following:

Some helpful debugging information:

  • xrandr output:
Screen 0: minimum 8 x 8, current 3440 x 1440, maximum 32767 x 32767
DP-0 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-0 connected primary 3440x1440+0+0 (normal left inverted right x axis y axis) 800mm x 335mm
   3440x1440     49.99*+
   1920x1080     59.94    50.00  
   1280x720      59.94    50.00  
   1024x768      60.00  
   800x600       60.32  
   720x576       50.00  
   720x480       59.94  
   640x480       59.94    59.93  
DP-2 connected (normal left inverted right x axis y axis)
   3840x2160     60.02 +
DP-3 disconnected (normal left inverted right x axis y axis)
DP-4 disconnected (normal left inverted right x axis y axis)
  • cvt 3440 1440 100 output:
# 3440x1440 99.99 Hz (CVT) hsync: 152.68 kHz; pclk: 728.00 MHz
Modeline "3440x1440_100.00"  728.00  3440 3728 4104 4768  1440 1443 1453 1527 -hsync +vsync
  • gtf 3440 1440 100 output:
  # 3440x1440 @ 100.00 Hz (GTF) hsync: 152.50 kHz; pclk: 729.56 MHz
  Modeline "3440x1440_100.00"  729.56  3440 3728 4112 4784  1440 1441 1444 1525  -HSync +Vsync

  • execute xrandr --newmode "3440x1440_100.00" 728.00 3440 3728 4104 4768 1440 1443 1453 1527 hsync +vsync

  • xrandr --addmode HDMI-0 3440x1440_100.00 output:

X Error of failed request:  BadMatch (invalid parameter attributes)
  Major opcode of failed request:  140 (RANDR)
  Minor opcode of failed request:  18 (RRAddOutputMode)
  Serial number of failed request:  39
  Current serial number in output stream:  40
  • relevant section of xorg.conf:

Section "Monitor"

# HorizSync source: edid, VertRefresh source: edid
Identifier     "Monitor0"
VendorName     "Unknown"
ModelName      "Acer X34 P"
HorizSync       30.0 - 140.0
VertRefresh     24.0 - 60.0
Option         "DPMS"



EndSection


Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "NVIDIA GeForce RTX 2060"
EndSection


Section "Screen"


Removed Option "metamodes" "HDMI-0: nvidia-auto-select +0+0"


Removed Option "metamodes" "HDMI-0: 3440x1440_100 +0+0"


Identifier     "Screen0"
Device         "Device0"
Monitor        "Monitor0"
DefaultDepth    24
Option         "Stereo" "0"
Option         "nvidiaXineramaInfoOrder" "DFP-2"
Option         "metamodes" "HDMI-0: nvidia-auto-select +0+0"
Option         "SLI" "Off"
Option         "MultiGPU" "Off"
Option         "BaseMosaic" "off"
SubSection     "Display"
    Depth       24
EndSubSection



EndSection

Kindly let me know of any additional required reproductory steps or output snippets that might help diagnose my problem here

Nethereal Laplace
  • 51
  • Usually, if you change your session to xorg you would be able to select higher refresh rates than on wayland. – Raffa Apr 23 '22 at 17:24
  • https://askubuntu.com/questions/1404070/ubuntu-22-04-lts-jammy-jellyfish-does-not-detect-higher-refresh-rates-on-exter#comment2438231_1404070

    but I am already running x11, indeed another problem is that I am also unable to setup Wayland currently (which should have been default no less with 22.04), please read the P.S. in my original post or go here: https://askubuntu.com/questions/1403854/cant-use-wayland-with-nvidia-510-drivers-on-ubuntu-22-04-lts?newreg=22493a2ede0a458d98afa08478176478

     – Nethereal Laplace Apr 23 '22 at 17:27

0 Answers0