Posts by miraclemaker

Pleased to say I was able to get it working with some help from this thread.

Latest output from
/opt/vc/bin/tvservice -m DMT

is:

Group DMT has 20 modes:
           mode 4: 640x480 @ 60Hz 4:3, clock:25MHz progressive
           mode 5: 640x480 @ 72Hz 4:3, clock:31MHz progressive
           mode 6: 640x480 @ 75Hz 4:3, clock:31MHz progressive
           mode 8: 800x600 @ 56Hz 4:3, clock:36MHz progressive
           mode 9: 800x600 @ 60Hz 4:3, clock:40MHz progressive
           mode 10: 800x600 @ 72Hz 4:3, clock:50MHz progressive
           mode 11: 800x600 @ 75Hz 4:3, clock:49MHz progressive
           mode 16: 1024x768 @ 60Hz 4:3, clock:65MHz progressive
           mode 17: 1024x768 @ 70Hz 4:3, clock:75MHz progressive
           mode 18: 1024x768 @ 75Hz 4:3, clock:78MHz progressive
           mode 21: 1152x864 @ 75Hz 4:3, clock:108MHz progressive
           mode 28: 1280x800 @ 60Hz 16:10, clock:83MHz progressive
           mode 32: 1280x960 @ 60Hz 4:3, clock:108MHz progressive
           mode 35: 1280x1024 @ 60Hz 5:4, clock:108MHz progressive
           mode 36: 1280x1024 @ 75Hz 5:4, clock:135MHz progressive
           mode 47: 1440x900 @ 60Hz 16:10, clock:106MHz progressive
           mode 48: 1440x900 @ 75Hz 16:10, clock:136MHz progressive
           mode 51: 1600x1200 @ 60Hz 4:3, clock:162MHz progressive
           mode 58: 1680x1050 @ 60Hz 16:10, clock:146MHz progressive
           mode 88: 3840x2160 @ 15Hz 16:9, clock:158MHz progressive

This is the settings I put in config.txt to get it working:

disable_overscan=1
hdmi_ignore_edid=0xa5000080
hdmi_group=2
hdmi_mode=88
hdmi_cvt 3840 2160 15
config_hdmi_bo*st=7
framebuffer_width=3840
framebuffer_height=2160

Note the typo in "config_hdmi_bo*st" - the forum is censoring that word for some reason.

Just updated LibreELEC to 9.2.1 and still have exactly the same issue. LibreELEC is currently unusable for me on the Raspberry Pi 4.

Any suggestions?

Same TV works perfectly with LibreELEC on a raspberry pi 3B.

Hardware spec:

Raspberry Pi 4B 4GB

LibreElec version: LibreELEC 9.2 Beta 2 (9.1.502)

Log file attached

I updated the Raspberry Pi to the latest firmware (Oct 4 2019 15:15:29) via the kodi interface.

All works fine when connected via HDMI to a computer monitor.

When connected to my Sony A1 tv (TV spec), the LibreELEC logo displays when booting, then the TV switches to 4096x2160 @ 13Hz (according to the overlay text) and the display goes blank.

I ran

/opt/vc/bin/tvservice -m CEA

which gave the output:

Group CEA has 1 modes:

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

I tried adding the following to config.txt:

hdmi_group=1

hdmi_mode=16

hdmi_force_mode=1

It seems to use that setting when booting then after the LibreELEC logo has displayed the TV still switches to 4096x2160 @ 13Hz and the display goes blank again.

I have tried using the resolution whitelisting within Kodi to just allow 1920x1080 @ 60Hz, but it made no difference.

Output of dmesg attached,

'lspci' gave command not found.

Output of lsusb isattached.

Seems like my post got deleted from the bug report forum :-s

Will do, thanks for the response.

I connect to my PC via HDMI using the same cable and everything works fine.

When connecting to my TV (Sony KD65A1) via HDMI, I see the multicolour screen, the LibreElec logo, and then the screen goes blank. The overlay text from the TV says the screen is being driven at 4096x2160/13Hz.

I have the the HDMI cable plugged into HDMI 0

I've attached my kodi.log

Many thanks for any assistance in advance!