First, back up the config.txt file.

Then, try modify disable_overscan=1 by changing it to #disable_overscan=1 .

Also, the last part looks strange. Did you have add it to fix the overscan issue?

state 0xa [HDMI CUSTOM RGB full 16:9], 1920x1080 @ 60.00Hz, progressive pi@bartop:/ $ /opt/vc/bin/tvservice -m CEA Group CEA has 4 modes: mode 4: 1280x720 @ 60Hz 16:9, clock:74MHz progressive (prefer) mode 16: 1920x1080 @ 60Hz 16:9, clock:148MHz progressive mode 95: 3840x2160 @ 30Hz 16:9, clock:297MHz progressive mode 97: 3840x2160 @ 60Hz 16:9, clock:594MHz progressive pi@bartop:/ $ /opt/vc/bin/tvservice -m DMT Group DMT has 1 modes: mode 4: 640x480 @ 60Hz 4:3, clock:25MHz progressive

Generally, for overscan issues, you have to uncomment and change these values:

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

@mitu yes, unfortunately

@mitu It was commented out in my /boot/config.txt file. I uncommented it, but it had no effect. Here is my current config.txt file:

# 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=4 # 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=4 # 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 overscan_scale=1 disable_splash=1 #enable_tvout=1

I should add that after uncommenting overscan_scale=1, I also tried uncommenting overscan_left and setting it to -16. It also had no effect.

@olivfpv said in Raspberry 4 HDMI resolution Problem:

I have the same problem when I try to install Lakka, rétropie impossible to force the resolution to 1920x1080

You're mentioning a resolution setting, but your error in the first post is from EmulationStation. Post your config.txt and the output from tvservice -m DMT.

Disabling the OpenGL driver is not supported and RetroPie (and the majority of the emulators) will not work without it.