NorbertR
Posts: 1
Joined: Sat Feb 15, 2020 9:57 am

No HDMI 4k 60hz signal

Sat Feb 15, 2020 10:13 am

Raspberry Pi 4 4gb
TV LG webOS UK6300PLB

4k 30hz and lower work without problems.

Code: Select all

[email protected]:~$ tvservice -s
state 0xa [HDMI CUSTOM RGB lim 16:9], 3840x2160 @ 60.00Hz, progressive
[email protected]:~$ tvservice -m CEA
Group CEA has 27 modes:
           mode 1: 640x480 @ 60Hz 4:3, clock:25MHz progressive 
           mode 2: 720x480 @ 60Hz 4:3, clock:27MHz progressive 
           mode 3: 720x480 @ 60Hz 16:9, clock:27MHz progressive 
           mode 4: 1280x720 @ 60Hz 16:9, clock:74MHz progressive 
           mode 5: 1920x1080 @ 60Hz 16:9, clock:74MHz interlaced 
           mode 16: 1920x1080 @ 60Hz 16:9, clock:148MHz progressive 
           mode 17: 720x576 @ 50Hz 4:3, clock:27MHz progressive 
           mode 18: 720x576 @ 50Hz 16:9, clock:27MHz progressive 
           mode 19: 1280x720 @ 50Hz 16:9, clock:74MHz progressive 
           mode 20: 1920x1080 @ 50Hz 16:9, clock:74MHz interlaced 
           mode 21: 720x576 @ 50Hz 4:3, clock:27MHz x2 interlaced 
           mode 31: 1920x1080 @ 50Hz 16:9, clock:148MHz progressive 
           mode 32: 1920x1080 @ 24Hz 16:9, clock:74MHz progressive 
           mode 33: 1920x1080 @ 25Hz 16:9, clock:74MHz progressive 
           mode 34: 1920x1080 @ 30Hz 16:9, clock:74MHz progressive 
           mode 63: 1920x1080 @ 120Hz 16:9, clock:297MHz progressive 
           mode 64: 1920x1080 @ 100Hz 16:9, clock:297MHz progressive 
           mode 93: 3840x2160 @ 24Hz 16:9, clock:297MHz progressive 
           mode 94: 3840x2160 @ 25Hz 16:9, clock:297MHz progressive 
           mode 95: 3840x2160 @ 30Hz 16:9, clock:297MHz progressive 
           mode 96: 3840x2160 @ 50Hz 16:9, clock:594MHz progressive 
  (prefer) mode 97: 3840x2160 @ 60Hz 16:9, clock:594MHz progressive 
           mode 98: 4096x2160 @ 24Hz unknown AR, clock:297MHz progressive 
           mode 99: 4096x2160 @ 25Hz unknown AR, clock:297MHz progressive 
           mode 100: 4096x2160 @ 30Hz unknown AR, clock:297MHz progressive 
           mode 101: 4096x2160 @ 50Hz unknown AR, clock:594MHz progressive 
           mode 102: 4096x2160 @ 60Hz unknown AR, clock:594MHz progressive 

Code: Select all

[email protected]:~$ cat /boot/config.txt
# For more options and information see
# http://rpf.io/configtxt
# Some settings may impact device functionality. See link above for details

# uncomment if you get no picture on HDMI for a default "safe" mode
#hdmi_safe=1

# uncomment this if your display has a black border of unused pixels visible
# and your display can output without overscan
#disable_overscan=1

# uncomment the following to adjust overscan. Use positive numbers if console
# goes off screen, and negative if there is too much border
#overscan_left=16
#overscan_right=16
#overscan_top=16
#overscan_bottom=16

# uncomment to force a console size. By default it will be display's size minus
# overscan.
#framebuffer_width=1280
#framebuffer_height=720

# uncomment if hdmi display is not detected and composite is being output
hdmi_force_hotplug=1

# uncomment to force a specific HDMI mode (this will force VGA)
#hdmi_group=1
#hdmi_mode=97

# uncomment to force a HDMI mode rather than DVI. This can make audio work in
# DMT (computer monitor) modes
#hdmi_drive=2

# uncomment to increase signal to HDMI, if you have interference, blanking, or
# no display
#config_hdmi_boost=11

# uncomment for composite PAL
#sdtv_mode=2

#uncomment to overclock the arm. 700 MHz is the default.
#arm_freq=800

# Uncomment some or all of these to enable the optional hardware interfaces
#dtparam=i2c_arm=on
#dtparam=i2s=on
#dtparam=spi=on

# Uncomment this to enable infrared communication.
#dtoverlay=gpio-ir,gpio_pin=17
#dtoverlay=gpio-ir-tx,gpio_pin=18

# Additional overlays and parameters are documented /boot/overlays/README

# Enable audio (loads snd_bcm2835)
dtparam=audio=on

[pi4]
# Enable DRM VC4 V3D driver on top of the dispmanx display stack
dtoverlay=vc4-fkms-v3d
max_framebuffers=2

[all]
#dtoverlay=vc4-fkms-v3d
gpu_mem=320
hdmi_enable_4kp60=1

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