Problem with my 4k TV

LeoXMasa

Hello !!

I have a problem with my TV 4K, i can't change resolution and my FPS are around 7 to 15 (in the main menu)

I have a raspberry pi 4 8g

I have nano /boot/config.txt and tried to change resolution (groupe 2 hdmi 82 /// groupe 1 hdmi 31..) but everytime i change it and reboot, i have a black screen and i must ssh to change it back to come back in 4K Can you help me please ?

Thank you . (sorry for my english i'm french)

mitu

Can you post the /boot/config.txt file - the one that you modified and is not working ?

dankcushions

@leoxmasa also note that

hdmi_group=1
hdmi_mode=31

is for a 50hz 1080 mode. you instead likely want

hdmi_group=1
hdmi_mode=16

which is 1080p60

see https://www.raspberrypi.org/documentation/configuration/config-txt/video.md

LeoXMasa

#hdmi_safe=1

#disable_overscan=1

#overscan_left=16
#overscan_right=16
#overscan_top=16
#overscan_bottom=16

#framebuffer_width=1280
#framebuffer_height=720

#hdmi_force_hotplug=1

#hdmi_group=1
#hdmi_mode=31

#hdmi_drive=2

config_hdmi_boost=4

#sdtv_mode=2

#arm_freq=800

#dtparam=i2c_arm=on
#dtparam=i2s=on
#dtparam=spi=on

#dtoverlay=gpio-ir,gpio_pin=17
#dtoverlay=gpio-ir-tx,gpio_pin=18

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
#overscan_scale=1
dtoverlay=RetroFlag_pw_io.dtbo
enable_uart=1

This one works (but in 4k). But when i try to do this:

hdmi_group=1
hdmi_mode=31

or

hdmi_group=2
hdmi_mode=82

or

hdmi_group=1
hdmi_mode=16

I have black screen on reboot

mitu

@leoxmasa said in Problem with my 4k TV:

hdmi_group=1
hdmi_mode=16

Try adding this to your config.txt and reboot

hdmi_max_pixel_freq:0=200000000
hdmi_max_pixel_freq:1=200000000

dankcushions

@leoxmasa said in Problem with my 4k TV:

config_hdmi_boost=4

also note that this option is ignored for pi4

LeoXMasa

@mitu said in Problem with my 4k TV:

@leoxmasa said in Problem with my 4k TV:

hdmi_group=1
hdmi_mode=16

Try adding this to your config.txt and reboot
hdmi_max_pixel_freq:0=200000000
hdmi_max_pixel_freq:1=200000000

No black screen but still in 4k 30 fps (with group 1 mode 16) and the line you told me to add

pi@retropie:~ $ tvservice -s
state 0xa [HDMI CUSTOM RGB lim 16:9], 3840x2160 @ 30.00Hz, progressive

edit: I have black border arround screen now ans i still have low fps

mitu

What's the output of:

tvservice -m CEA

LeoXMasa

@mitu

pi@retropie:~ $ 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 6: 720x480 @ 60Hz 4:3, clock:27MHz x2 interlaced 
           mode 7: 720x480 @ 60Hz 16:9, clock:27MHz x2 interlaced 
           mode 14: 720x480 @ 60Hz 4:3, clock:54MHz x2 progressive 
           mode 15: 720x480 @ 60Hz 16:9, clock:54MHz x2 progressive 
           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 22: 720x576 @ 50Hz 16:9, clock:27MHz x2 interlaced 
  (native) 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 35: 720x480 @ 60Hz 4:3, clock:108MHz x4 progressive 
           mode 93: 3840x2160 @ 24Hz 16:9, clock:297MHz progressive 
           mode 94: 3840x2160 @ 25Hz 16:9, clock:297MHz progressive 
  (prefer) mode 95: 3840x2160 @ 30Hz 16:9, clock:297MHz 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 
pi@retropie:~ $

mitu

@leoxmasa said in Problem with my 4k TV:

       mode 16: 1920x1080 @ 60Hz 16:9, clock:148MHz progressive

I guess you can tell the Pi to ignore the EDID info from the TV. Add these lines (make sure they're not commented):

hdmi_ignore_edid=0xa5000080
hdmi_group=1
hdmi_mode=16

LeoXMasa

@mitu

Ok now black screen again (i see command start line but emustation never show and display black screen). In SSH i have this now:

state 0xa [HDMI CUSTOM RGB lim 16:9], 1920x1080 @ 60.00Hz, progressive

mitu

That't strange. Are you using the image from retropie.org.uk/download ?

LeoXMasa

@mitu

for my install:

I used raspery pi imager (to download the last version)
I'm booting on SSD USB
I've installed safe shutdown script for my nespi case

Actually in my hardware installation i have the R4 connected to my denon amp, connected to my tv. (it work for all my other devices (ps5 switch et PC)

LeoXMasa

@mitu

I have found a way. I # everything, connecte my raspberry to a no-4k port of my amp audio , and now it show

state 0xa [HDMI CUSTOM RGB lim 16:9], 1920x1080 @ 50.00Hz, progressive

It's seems retropie doesn't like my Audio Amp.

i there anyway to remove the border aound ? :)

mitu

@leoxmasa Yes, add disable_overscan=1 to config.txt - see https://retropie.org.uk/docs/Overscan/.

LeoXMasa

@mitu

thank you very much to taking for my problem :)