Tommie
Posts: 2
Joined: Tue Jun 12, 2012 12:18 pm

No HDMI output on LG TV

Tue Jun 12, 2012 12:25 pm

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:

Code: Select all

pi@raspberrypi:~$ 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.

Code: Select all

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

dom
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Re: No HDMI output on LG TV

Tue Jun 12, 2012 12:33 pm

"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)

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extravagoose
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Re: No HDMI output on LG TV

Tue Jun 12, 2012 12:35 pm

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
RPi 1: Hostname: Gimli, 500Gb USB HDD, ArchLinux | ARM.
Main Use: Bit of everything - but mainly web server, Network Storage and C programming.

RPi 2: Hostname tba, awaiting delivery.

Tommie
Posts: 2
Joined: Tue Jun 12, 2012 12:18 pm

Re: No HDMI output on LG TV

Sun Jun 17, 2012 12:12 am

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

Code: Select all

root@raspberrypi:/home/pi# cat /boot/config.txt
sdtv_mode=2
hdmi_force_hotplug=1
config_hdmi_boost=5
hdmi_drive=2

Code: Select all

root@raspberrypi:/home/pi# /opt/vc/bin/tvservice -s
state: HPD high|HDMI mode|HDCP off|composite off (0x12001a), 1280x768 @ 60Hz, progressive
root@raspberrypi:/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
root@raspberrypi:/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
root@raspberrypi:/home/pi# 
How ever, no picture and TV indicating "NO SIGNAL".

steveastrouk
Posts: 6
Joined: Sun Aug 05, 2012 5:57 pm

Re: No HDMI output on LG TV

Sun Aug 05, 2012 5:58 pm

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

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proyecto
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Re: No HDMI output on LG TV

Sun Aug 19, 2012 1:55 pm

Exactly the same problem. Not working yet.
http://www.twitter.com/proyecto
http://www.enigmatres.es

steveastrouk
Posts: 6
Joined: Sun Aug 05, 2012 5:57 pm

Re: No HDMI output on LG TV

Sun Aug 19, 2012 3:27 pm

proyecto wrote: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
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Raspberry Pi Engineer & Forum Moderator
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Re: No HDMI output on LG TV

Sun Aug 19, 2012 3:41 pm

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

steveastrouk
Posts: 6
Joined: Sun Aug 05, 2012 5:57 pm

Re: No HDMI output on LG TV

Sun Aug 19, 2012 4:00 pm

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

Steve

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proyecto
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Re: No HDMI output on LG TV

Sun Aug 19, 2012 4:30 pm

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.
http://www.twitter.com/proyecto
http://www.enigmatres.es

steveastrouk
Posts: 6
Joined: Sun Aug 05, 2012 5:57 pm

Re: No HDMI output on LG TV

Sun Aug 19, 2012 4:53 pm

proyecto wrote: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
Posts: 6
Joined: Sun Aug 05, 2012 5:57 pm

Re: No HDMI output on LG TV

Sun Aug 19, 2012 5:24 pm

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

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proyecto
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Location: Sevilla (Spain)
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Re: No HDMI output on LG TV

Sun Aug 19, 2012 7:22 pm

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
http://www.twitter.com/proyecto
http://www.enigmatres.es

dom
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
Posts: 5099
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Location: Cambridge

Re: No HDMI output on LG TV

Mon Aug 20, 2012 10:56 am

@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
Posts: 6
Joined: Sun Aug 05, 2012 5:57 pm

Re: No HDMI output on LG TV

Mon Aug 20, 2012 11:43 am

37LG6000

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proyecto
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Re: No HDMI output on LG TV

Wed Sep 26, 2012 8:48 pm

Back again, not able to make it work yet. Attached edid.dat zipped.
Attachments
edid.dat.zip
(815 Bytes) Downloaded 140 times
http://www.twitter.com/proyecto
http://www.enigmatres.es

deimusmeister
Posts: 4
Joined: Wed Nov 28, 2012 11:40 pm

Re: No HDMI output on LG TV

Wed Nov 28, 2012 11:42 pm

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

dom
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
Posts: 5099
Joined: Wed Aug 17, 2011 7:41 pm
Location: Cambridge

Re: No HDMI output on LG TV

Thu Nov 29, 2012 2:37 pm

proyecto wrote: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
Posts: 3
Joined: Fri Nov 30, 2012 6:28 am

Re: No HDMI output on LG TV

Fri Nov 30, 2012 6:33 am

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

hdmi_ignore_edid=0xa5000080

deimusmeister
Posts: 4
Joined: Wed Nov 28, 2012 11:40 pm

Re: No HDMI output on LG TV

Thu Dec 06, 2012 8:04 pm

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

deimusmeister
Posts: 4
Joined: Wed Nov 28, 2012 11:40 pm

Re: No HDMI output on LG TV

Thu Dec 06, 2012 8:08 pm

@dom can you please review my edid as well ?
Attachments
edid.dat.txt.zip
(1.34 KiB) Downloaded 115 times

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proyecto
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Re: No HDMI output on LG TV

Thu Dec 06, 2012 8:36 pm

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

hdmi_ignore_edid=0xa5000080
I will try it next week. Thanks!
http://www.twitter.com/proyecto
http://www.enigmatres.es

deimusmeister
Posts: 4
Joined: Wed Nov 28, 2012 11:40 pm

Re: No HDMI output on LG TV

Thu Dec 06, 2012 9:13 pm

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 :(


aaa801
Posts: 428
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Location: Berkshire

Re: No HDMI output on LG TV

Fri Dec 07, 2012 11:56 am

works fine on my lg tv

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