Cannot get to run 4k @60hz

General system Kernel, boot, graphics & hardware
1 
Linux version 6.12.17-1-lts (linux-lts@archlinux) (gcc (GCC) 14.2.1 20250207, GNU ld (GNU Binutils) 2.44) #1 SMP PREEMPT_DYNAMIC Thu, 27 Feb 2025 14:12:30 +0000

I am on a 6800xt GPU. Getting this error when trying to change the hz to 60.
Couldn't apply display configuration: The driver rejected the output configuration.

Tried other smaller resolutions and it seems to work fine also 4k @50hz works too. I have Windows on dual boot and the display works fine on it but not on linux it seems. Imagined it might be cable so got a new cable that should support upto 8k@60hz and still no change. The display is connected via HDMI cable.

Any suggestions?

2

How do you do that? What is the command / config you use?
And is this with wayland or X11?
Please share output of inxi -Fz

3 
System:
  Kernel: 6.12.17-1-lts arch: x86_64 bits: 64
  Desktop: KDE Plasma v: 6.3.2 Distro: EndeavourOS
Machine:
  Type: Desktop System: Gigabyte product: B450 AORUS PRO WIFI v: N/A
    serial: <superuser required>
  Mobo: Gigabyte model: B450 AORUS PRO WIFI-CF serial: <superuser required>
    UEFI: American Megatrends LLC. v: F66d date: 09/02/2024
CPU:
  Info: 8-core model: AMD Ryzen 7 5800X3D bits: 64 type: MT MCP cache:
    L2: 4 MiB
  Speed (MHz): avg: 3599 min/max: 550/4550 cores: 1: 3599 2: 3599 3: 3599
    4: 3599 5: 3599 6: 3599 7: 3599 8: 3599 9: 3599 10: 3599 11: 3599 12: 3599
    13: 3599 14: 3599 15: 3599 16: 3599
Graphics:
  Device-1: Advanced Micro Devices [AMD/ATI] Navi 21 [Radeon RX 6800/6800 XT
    / 6900 XT] driver: amdgpu v: kernel
  Display: wayland server: X.org v: 1.21.1.16 with: Xwayland v: 24.1.6
    compositor: kwin_wayland driver: X: loaded: amdgpu
    unloaded: modesetting,radeon dri: radeonsi gpu: amdgpu resolution:
    1: 1920x1080~144Hz 2: 3840x2160~50Hz
  API: EGL v: 1.5 drivers: kms_swrast,radeonsi,swrast
    platforms: gbm,wayland,x11,surfaceless,device
  API: OpenGL v: 4.6 compat-v: 4.5 vendor: amd mesa v: 24.3.4-arch1.1
    renderer: AMD Radeon RX 6800 XT (radeonsi navi21 LLVM 19.1.7 DRM 3.61
    6.12.17-1-lts)
  API: Vulkan Message: No Vulkan data available.
  Info: Tools: api: clinfo, eglinfo, glxinfo, vulkaninfo
    de: kscreen-console,kscreen-doctor wl: wayland-info
    x11: xdpyinfo, xprop, xrandr
4

What does xrandr -q show?

5 
#Main 1080 144hz monitor
DP-1 connected primary 3840x2160+0+2160 (normal left inverted right x axis y axis) 531mm x 298mm
   3840x2160    143.94*+
   2048x1536    143.94  
   1920x1440    143.90  
   1600x1200    143.89  
   1440x1080    143.80  
   1400x1050    143.89  
   1280x1024    143.79  
   1280x960     143.86  
   1152x864     143.92  
   1024x768     143.87  
   800x600      143.83  
   640x480      143.85  
   320x240      142.05  
   2560x1600    143.96  
   1920x1200    143.89  
   1680x1050    143.88  
   1440x900     143.86  
   1280x800     143.84  
   1152x720     143.77  
   960x600      143.72  
   928x580      143.50  
   800x500      143.68  
   768x480      143.69  
   720x480      143.85  
   640x400      143.37  
   320x200      141.40  
   3200x1800    143.91  
   2880x1620    143.95  
   2560x1440    143.91  
   2048x1152    143.88  
   1920x1080    143.88  
   1600x900     143.93  
   1368x768     143.77  
   1280x720     143.67  
   1024x576     143.91  
   864x486      143.63  
   720x400      143.88  
   640x350      143.57  

#This is the 4k display that's not going above 50hz
HDMI-A-1 connected 3840x2160+0+0 (normal left inverted right x axis y axis) 1872mm x 1053mm
   3840x2160     49.97*+
   2048x1536     49.98  
   1920x1440     49.98  
   1600x1200     49.92  
   1440x1080     49.98  
   1400x1050     49.97  
   1280x1024     49.84  
   1280x960      49.85  
   1152x864      49.91  
   1024x768      49.98  
   800x600       49.92  
   640x480       49.67  
   320x240       46.94  
   2560x1600     49.95  
   1920x1200     49.93  
   1680x1050     49.97  
   1440x900      49.88  
   1280x800      49.95  
   1152x720      49.76  
   960x600       49.65  
   928x580       49.91  
   800x500       49.62  
   768x480       49.78  
   720x480       49.76  
   640x400       49.70  
   320x200       46.51  
   3200x1800     49.98  
   2880x1620     49.99  
   2560x1440     49.96  
   2048x1152     49.98  
   1920x1080     49.93  
   1600x900      49.94  
   1368x768      49.84  
   1280x720      49.83  
   1024x576      49.81  
   864x486       49.61  
   720x400       49.28  
   640x350       49.12
6

I see it’s doing what its say’s.

Display: wayland server: X.org v: 1.21.1.16 with: Xwayland v: 24.1.6
    compositor: kwin_wayland driver: X: loaded: amdgpu
    unloaded: modesetting,radeon dri: radeonsi gpu: amdgpu resolution:
    1: 1920x1080~144Hz 2: 3840x2160~50Hz

What are the monitors it’s connected to in order as above.
Edit: Are both monitors connected to the 6800XT as i see you have cpu with iGPU?

7

Yes both monitors are connected to the GPU, the 4k one is connected to a HDMI port and no, my CPU does not have an igpu.

8

You seem to be facing a similar issue as me: Monitor capped at 30Hz after yay (on Wayland)

Can you log into an X session and check if the problem also occurs there? While not a solution, it might help narrow down the issue.

9

Wow you were right - it works perfectly fine at 60hz when I’m on a X11 session. Would’ve never expected this to be the cause lol

10

yay

The problem ceased to exist for me with a system update just now. Give it a try and report back, please! Good luck!

1 Like