No HDMI output on LG TV

[Tommie]

Hello,
I connected my Raspberry to my LG TV via HDMI and loaded the Debian 6 image onto the SD card, but altough I tried tinkering with config.txt and updated my firmware as well, I am still unable to get any video signal on my tv set ("No signal"). At least I am able to use SSH.

This is what read-edid says about the output of /opt/vc/bin/tvservice -d:

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[email protected]:~$ parse-edid edid.dat 
parse-edid: parse-edid version 2.0.0
parse-edid: EDID checksum passed.

	# EDID version 1 revision 3
Section "Monitor"
	# Block type: 2:0 3:fc
	Identifier "LG TV"
	VendorName "GSM"
	ModelName "LG TV"
	# Block type: 2:0 3:fc
	# Block type: 2:0 3:fd
	HorizSync 28-67
	VertRefresh 50-75
	# Max dot clock (video bandwidth) 150 MHz
	# DPMS capabilities: Active off:yes  Suspend:yes  Standby:yes

	Mode 	"1360x768"	# vfreq 59.799Hz, hfreq 47.720kHz
		DotClock	84.750000
		HTimings	1360 1432 1568 1776
		VTimings	768 771 776 798
		Flags	"+HSync" "-VSync"
	EndMode
	Mode 	"1280x768"	# vfreq 60.352Hz, hfreq 48.161kHz
		DotClock	80.140000
		HTimings	1280 1344 1472 1664
		VTimings	768 771 778 798
		Flags	"-HSync" "-VSync"
	EndMode
	# Block type: 2:0 3:fc
	# Block type: 2:0 3:fd
EndSection

I tried setting various options in /boot/config.txt, but with no actual success.

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[email protected]:~$ /opt/vc/bin/tvservice -s
state: HPD low|HDMI off|NTSC mode|composite CP off (0x140001), 720x480 @ 60Hz, interlaced
[email protected]:~$ /opt/vc/bin/tvservice -p
Powering on HDMI with preferred settings
[E] Failed to power on HDMI with preferred settings

Any advice?

[dom]

"state: HPD low" is the problem. Make sure monitor is powered on and on right input setting before booting pi.

If no luck, try hdmi_force_hotplug=1
(see here: http://elinux.org/R-Pi_Troubleshooting# ... put_at_all)

[extravagoose]

I had this issue with Arch - I first tried simply renaming or move the config.txt file to another directory... or just wipe its contents. This seemed to work for me. Of course this may bare no relevance to Debian or indeed you setup.

But as said by dom,
try using hdmi_force_hotplug=1

[Tommie]

Using this config.txt, I still do not get a picture on my TV:

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[email protected]:/home/pi# cat /boot/config.txt
sdtv_mode=2
hdmi_force_hotplug=1
config_hdmi_boost=5
hdmi_drive=2

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[email protected]:/home/pi# /opt/vc/bin/tvservice -s
state: HPD high|HDMI mode|HDCP off|composite off (0x12001a), 1280x768 @ 60Hz, progressive
[email protected]:/home/pi# /opt/vc/bin/tvservice -m CEA
Group CEA has 16 modes:
           mode 1: 640x480 @ 60Hz, progressive
           mode 2: 720x480 @ 60Hz, progressive
           mode 3: 720x480 @ 60Hz, progressive
           mode 4: 1280x720 @ 60Hz, progressive
  (native) mode 5: 1920x1080 @ 60Hz, interlaced
           mode 7: 720x480 @ 60Hz, interlaced
           mode 16: 1920x1080 @ 60Hz, progressive
           mode 17: 720x576 @ 50Hz, progressive
           mode 18: 720x576 @ 50Hz, progressive
           mode 19: 1280x720 @ 50Hz, progressive
           mode 20: 1920x1080 @ 50Hz, interlaced
           mode 22: 720x576 @ 50Hz, interlaced
           mode 31: 1920x1080 @ 50Hz, progressive
           mode 32: 1920x1080 @ 24Hz, progressive
           mode 33: 1920x1080 @ 25Hz, progressive
           mode 34: 1920x1080 @ 30Hz, progressive
[email protected]:/home/pi# /opt/vc/bin/tvservice -m DMT
Group DMT has 4 modes:
           mode 4: 640x480 @ 60Hz, progressive
           mode 9: 800x600 @ 60Hz, progressive
           mode 16: 1024x768 @ 60Hz, progressive
           mode 23: 1280x768 @ 60Hz, progressive
[email protected]:/home/pi# 

How ever, no picture and TV indicating "NO SIGNAL".

[steveastrouk]

Tommie,
I have exactly the same problem - I've even updated my telly's firmware, but no joy.
Did you EVER get the thing working ?
Thanks

Steve

[proyecto]

Exactly the same problem. Not working yet.

[steveastrouk]

Exactly the same problem. Not working yet.

Balls. Me neither, but it MIGHT be worth unplugging the TV and trying again when it restarts.
Steve

[dom]

Make your you've got recent firmware (official wheezy/raspbian shoud be okay) and try
hdmi_safe=1
In config.txt.

[steveastrouk]

I've tried several HDMI hacks in the config file, and they didn't work. Will try the latest distribution though.

Steve

[proyecto]

I have also tested all the config hacks I have seen on the web, updated firmware with the latest Raspbian version, and nothing.
The same Raspi works perfectly in a samsung tv.

[steveastrouk]

I have also tested all the config hacks I have seen on the web, updated firmware with the latest Raspbian version, and nothing.
The same Raspi works perfectly in a samsung tv.

Trying the new firmware any minute. I'll concur shortly....
What the heck is it with LG and PI ?

Which TV have you got proyecto ?

Steve

[steveastrouk]

OK, Latest Raspbian,STILL no luck,
Hotplug set to 1
Safe mode set to 1

[proyecto]

Latest Raspbian, latest firmware updated via Hexxeh tool. Not working even with the config.txt hacks commented above.

My tv: http://www.lg.com/es/monitores/lg-M2780D-PZ-monitor

Code: Select all

/opt/vc/bin/tvservice -s
state: HPD high|HDMI mode|HDCP off|composite off (0x12001a), 640x480 @ 60Hz, progressive

Code: Select all

/opt/vc/bin/tvservice -m CEA
Group CEA has 1 modes:
           mode 1: 640x480 @ 60Hz, progressive

[dom]

@steveastrouk @proyecto
Can you dump your edids and attach them to response (you will need to zip them)
/opt/vc/bin/tvservice -d edid.dat

@steveastrouk what is the exact model?

[steveastrouk]

37LG6000

[proyecto]

Back again, not able to make it work yet. Attached edid.dat zipped.

[deimusmeister]

Is there any update on this ? seems rapsberry has a problem to connect to LG TVs

[dom]

Back again, not able to make it work yet. Attached edid.dat zipped.

Nothing surprising in edid.dat. With hdmi_safe=1 we are outputting a manditory HDMI mode, and we are hdmi compliant.

Possibilities are:
a hardware fault on Pi. If you can drive other monitors, then that seems unlikely.
a hardware fault on TV or with HDMI cable. Can you definitely drive this monitor from another source, using the same HDMI cable and HDMI input port on TV?

Other settings to randomly try: (remove hdmi_safe and other settings first)

Always add:
hdmi_force_hotplug=1
config_hdmi_boost=7

Try combintation of:
hdmi_drive=1
or
hdmi_drive=2

hdmi_group=1
or
hdmi_group=2

hdmi_mode=<mode>
with modes listed here:
http://elinux.org/RPi_config.txt

[zwg_zero]

try add this line in config.txt (ignore reading TV's edid message)

hdmi_ignore_edid=0xa5000080

[deimusmeister]

what address is that 0xa5000080 ?
In my case it might be another

[deimusmeister]

@dom can you please review my edid as well ?

[proyecto]

try add this line in config.txt (ignore reading TV's edid message)

hdmi_ignore_edid=0xa5000080

I will try it next week. Thanks!

[deimusmeister]

I'm just surfing, seems there is a widespread issues for LG HDMI inputs, anyway I don't have another HDMI device to test the tv

[zwg_zero]

please look into http://elinux.org/RPi_config.txt

[aaa801]

works fine on my lg tv