Can't not enable 4k 60HZ in raspberry pi 4

Does anyone have successfully enabled 4k 60HZ in manjaro arm xfce 20.08? Thanks

I am using the official micro hdmi cable and power supply. So can eliminate hardware problems.

Make sure that you are running only 1 monitor and the cable is in the HDMI port closest to the power plug.

That should give you a desktop in 4K60Hz.

Strit, Thanks first.
I only connected my raspberry pi 4 to my AOC monitor which can output 4k 60HZ in Win10 and this HDMI port closest to the power plug.

I can see the 4k 60HZ in display dialog box. But when I chose it and click apply then my monitor show “no signal”

I had added “hdmi_enable_4kp60=1” to /boot/config.txt.

Is your HDMI cable compatible with HDMI specification version 2.0 or above?

Yes. I double checked and my cable is official micro hdmi cable.

I think I can not see 4k 60HZ in display dialog box if my cable not compatible with HDMI specification version 2.0 .

Thanks Feakster.

Seems like some one else could only get theirs working only in fbturbo mode (default in raspian). We have our images configured for mesa 3d rendering.

Try installing xf86-video-fbturbo-git from the repo
Change gpu_mem to 512 in config.txt
leave hdmi_enable_4kp60=1 as is
Reboot and see what it does

Darksky, thanks for you help first.

I did it once as you said and it showed no signal after reboot. Below is my config.txt content

initramfs initramfs-linux.img followkernel
kernel=kernel8.img
arm_64bit=1
enable_gic=1
disable_overscan=1

#enable sound
dtparam=audio=on
hdmi_drive=2

#enable vc4
dtoverlay=vc4-fkms-v3d
max_framebuffers=2
over_voltage=6
arm_freq=2000
gpu_freq=750
gpu_mem=512
hdmi_enable_4kp60=1

Try this config:

initramfs initramfs-linux.img followkernel
kernel=kernel8.img
arm_64bit=1
enable_gic=1
disable_overscan=1

#enable sound
dtparam=audio=on
hdmi_drive=2

#enable vc4
dtoverlay=vc4-fkms-v3d
max_framebuffers=2
over_voltage=5          # 6 voids your warranty
arm_freq=2000
# gpu_freq=750
gpu_mem=512
hdmi_enable_4kp60:0=1
hdmi_mode:0=97
hdmi_group:0=1
hdmi_force_mode:0=1
hdmi_ignore_edid:0=0xa5000080

Hi Darksky,

I used the configuration you provided. After loading, a black screen was displayed, and the login interface was not displayed. But I can ssh link to my Raspberry Pi 4.

Thanks again.

Try rem out these 2 lines and reboot. Other than this I am out of ideas.

#dtoverlay=vc4-fkms-v3d
#max_framebuffers=2

Had this problem in July without solution. Driver seems to be broken.
See my own thread: archived.forum.manjaro DOT org/t/4k-60-hz-on-raspi4/152723