RPi4B no Signal on Samsung TV after Switching Inputs

DennYo · October 26, 2021 at 4:43 PM

Hello,

I read some other topics but its not exactly my Problem.

I've read so far:

Post

RE: LibreElec 9.95.4 on Raspberry Pi 4 with Argon One V2 case - HDMI problems

(Code, 28 lines)

Some outputs that might bring some light into the case... it all looks just so weird..

Vlado753

June 17, 2021 at 2:33 PM

Post

tvservice doesn't find the connected monitor

Hardware

Raspberry Pi 4 Model B Rev 1.2, BCM2711, c03112
Monitor: ProLite T2453MTS-B1, 1920x1080
Hifiberry

Libreelec

LE 9.95.3
upgraded via Libreelec-Addon from 9.26 to 9.95.2 and one day later to 9.95.3 (yes, I know, it's not recommended)

Issue

(Code, 2 lines)

Nevertheless the picture is shown. Kodi works without any problem.

When the system boots and the splashscreen appears, the picture is pale. The black is only a gray.

For that reason i configured in /flash/config.txt

(Code, 2 lines)

With this…

Wickie1

May 22, 2021 at 12:22 PM

Post

RE: No video output from new RPi4b

Maybe I have a similar problem.

Hardware:

- Raspberry PI 4b.

- Monitor: Iiyama Prolite T2453MTS

Now I did some really stupid. I followed (not) this advice and upgraded my Libreelec 9.26 to 9.95. After some struggeling everything worked (Hifiberry, TV Headend, Netflix, Simple IPTV).

Only one thing has been left:

When I installed the system for the first time, I dispaired when I tried to get the monitor running properly. There was no black no real colours. The picture was something grey.

I fixed this…

Wickie1

May 20, 2021 at 12:34 AM

Settings:

---------------

Hardware:

Libereelec 10 on Raspberry Pi4B 4GB

Samsung 4K TV, 2020 Model

Samsung Soundbar Q950T (which has 3 HDMI Ports: 2 Inputs, 1 Output)

Cables:

AmazonBasics HDMI 2.0 fast Ethernet Micro HDMI Cable

also tested:

AmazonBasics HDMI 2.0 Cable with Micro HDMI Adapter which is also HDMI 2.0 from UGREEN

The Cable was formerly connected to an Odroid N2 and did 4k 60Hz without Problems.

Connection:

RPi4 HDMI Port 0 -> Samsung Soundbar HDMI 2 -> Samsung TV HDMI 2 (eARC)

Software:

distroconfig.txt:

hdmi_enable_4kp60=1

cec_osd_name=kodi

hdmi_force_hotplug=1 (setting it to 0 or 1 has no impact on my problem)

config.txt:

hdmi_ignore_cec_init=1

gpu_mem=256

Target:

----------

Having 4k 60Hz Picture on my Samsung 4K TV

General Proof:

---------------------

3840x2160p @ 60 Hz works with FireCube, so TV can.

3840x2160p @ 60 Hz also works with RPi4B after fresh boot

Problem Description:

------------------------------

When I have chosen RPi4 Input and boot up the RPi I have Splash Screen, GUI comes up, TV shows I have 3840x2160p @ 60 Hz, everything good.

-> So here we have proof that it works, I have basically no 4K Issue because I have GUI Running, can watch movies etc.

BUT...

1. Then I switch Input to FireCube which comes up with 3840x2160p @ 60 Hz

2. Then I switch back to RPi4 (Kodi) -> No Signal

3. Reboot Pi -> Signal in 4K is back

Same behaviour is when I turn TV off and on again -> No Signal from RPi

With FHD Settings in Kodi I don't have these issues. Its only in 4K Mode.

Enhanced UHD Colors is activated on TV.

My Feeling:

-----------------

I would assume kind of a negotiation Problem when switching back and forth as the Samsung shows pretty long the "loading" Circle and ends up in "No Signal, Check Source". As if the Pi needs to send kind of an init signal which does not come.

Also strange is that even if I see a picture after rebooting the tvservice sais no "device attached"....

Info:

-------

Kodi is on he whole time, I can reach it via ssh and it operates normal. (I also read about one guy who's kodi always crashed, thats not my problem)

After freshly booted (GUI on the Screen) I have this output

Code

kodi:~ # tvservice -l
0 attached device(s), display ID's are :

After switched Inputs (no Signal), the same:

Code

kodi:~ # tvservice -l
0 attached device(s), display ID's are :

Created edid via:

tvservice -d

then

edidparser

output:

Code

HDMI:EDID version 1.3, 1 extensions, screen size 121x68 cm
HDMI:EDID features - videodef 0x80 !standby !suspend !active off; colour encoding:RGB444|YCbCr422; sRGB is not default colourspace; preferred format is native; does not support GTF
HDMI:EDID found monitor name descriptor tag 0xfc
HDMI:EDID monitor name is SAMSUNG
HDMI:EDID found monitor range descriptor tag 0xfd
HDMI:EDID monitor range offsets: V min=0, V max=0, H min=0, H max=0
HDMI:EDID monitor range: vertical is 24-75 Hz, horizontal is 15-135 kHz, max pixel clock is 600 MHz
HDMI:EDID monitor range does not support GTF
HDMI:EDID found preferred CEA detail timing format: 3840x2160p @ 60 Hz (97)
HDMI:EDID failed to find a matching detail format for 2560x1440p hfp:48 hs:32 hbp:80 vfp:3 vs:5 vbp:33 pixel clock:241 MHz
HDMI:EDID calculated refresh rate is 60 Hz
HDMI:EDID guessing the format to be 2560x1440p @60 Hz
HDMI:EDID found unknown detail timing format: 2560x1440p hfp:48 hs:32 hbp:80 vfp:3 vs:5 vbp:33 pixel clock:241 MHz
HDMI:EDID established timing I/II bytes are BD EF 80
HDMI:EDID found DMT format: code 4, 640x480p @ 60 Hz in established timing I/II
HDMI:EDID found DMT format: code 5, 640x480p @ 72 Hz in established timing I/II
HDMI:EDID found DMT format: code 6, 640x480p @ 75 Hz in established timing I/II
HDMI:EDID found DMT format: code 9, 800x600p @ 60 Hz in established timing I/II
HDMI:EDID found DMT format: code 10, 800x600p @ 72 Hz in established timing I/II
HDMI:EDID found DMT format: code 11, 800x600p @ 75 Hz in established timing I/II
HDMI:EDID found DMT format: code 16, 1024x768p @ 60 Hz in established timing I/II
HDMI:EDID found DMT format: code 17, 1024x768p @ 70 Hz in established timing I/II
HDMI:EDID found DMT format: code 18, 1024x768p @ 75 Hz in established timing I/II
HDMI:EDID found DMT format: code 36, 1280x1024p @ 75 Hz in established timing I/II
HDMI:EDID standard timings block x 8: 0x714F 81C0 8100 8180 9500 A9C0 B300 D1C0
HDMI:EDID found DMT format: code 21, 1152x864p @ 75 Hz (4:3) in standard timing 0
HDMI:EDID found DMT format: code 85, 1280x720p @ 60 Hz (16:9) in standard timing 1
HDMI:EDID found DMT format: code 28, 1280x800p @ 60 Hz (16:10) in standard timing 2
HDMI:EDID found DMT format: code 35, 1280x1024p @ 60 Hz (5:4) in standard timing 3
HDMI:EDID found DMT format: code 47, 1440x900p @ 60 Hz (16:10) in standard timing 4
HDMI:EDID found DMT format: code 83, 1600x900p @ 60 Hz (16:9) in standard timing 5
HDMI:EDID found DMT format: code 58, 1680x1050p @ 60 Hz (16:10) in standard timing 6
HDMI:EDID found DMT format: code 82, 1920x1080p @ 60 Hz (16:9) in standard timing 7
HDMI:EDID parsing v3 CEA extension 0
HDMI:EDID monitor support - underscan IT formats:yes, basic audio:yes, yuv444:yes, yuv422:yes, #native DTD:0
HDMI:EDID found CEA detail timing format: 1920x1080p @ 60 Hz (16)
HDMI:EDID found CEA format: code 97, 3840x2160p @ 60Hz
HDMI:EDID found CEA format: code 16, 1920x1080p @ 60Hz
HDMI:EDID found CEA format: code 31, 1920x1080p @ 50Hz
HDMI:EDID found CEA format: code 4, 1280x720p @ 60Hz
HDMI:EDID found CEA format: code 19, 1280x720p @ 50Hz
HDMI:EDID found CEA format: code 5, 1920x1080i @ 60Hz
HDMI:EDID found CEA format: code 20, 1920x1080i @ 50Hz
HDMI:EDID found CEA format: code 32, 1920x1080p @ 24Hz
HDMI:EDID found CEA format: code 33, 1920x1080p @ 25Hz
HDMI:EDID found CEA format: code 34, 1920x1080p @ 30Hz
HDMI:EDID found CEA format: code 93, 3840x2160p @ 24Hz
HDMI:EDID found CEA format: code 94, 3840x2160p @ 25Hz
HDMI:EDID found CEA format: code 95, 3840x2160p @ 30Hz
HDMI:EDID found CEA format: code 96, 3840x2160p @ 50Hz
HDMI:EDID found CEA format: code 101, 4096x2160p @ 50Hz
HDMI:EDID found CEA format: code 102, 4096x2160p @ 60Hz
HDMI:EDID found CEA format: code 98, 4096x2160p @ 24Hz
HDMI:EDID found CEA format: code 100, 4096x2160p @ 30Hz
HDMI:EDID found CEA format: code 7, 1440x480i @ 60Hz
HDMI:EDID found CEA format: code 22, 1440x576i @ 50Hz
HDMI:EDID found CEA format: code 3, 720x480p @ 60Hz
HDMI:EDID found CEA format: code 18, 720x576p @ 50Hz
HDMI:EDID found audio format 2 channels PCM, sample rate: 32|44|48|88|96|176|192 kHz, sample size: 16|20|24 bits
HDMI:EDID found audio format 8 channels PCM, sample rate: 32|44|48|88|96|176|192 kHz, sample size: 16|20|24 bits
HDMI:EDID found audio format 8 channels MLP, sample rate: 32|44|48|88|96|176|192 kHz, codec define: 3
HDMI:EDID found audio format 8 channels Dobly Digital+, sample rate: 32|44|48 kHz, codec define: 3
HDMI:EDID found audio format 8 channels AC3, sample rate: 32|44|48 kHz, bitrate: 640 kbps
HDMI:EDID found audio format 8 channels DTS-HD, sample rate: 44|48|88|96|176|192 kHz, codec define: 3
HDMI:EDID found audio format 8 channels DTS-HD, sample rate: 44|48|88|96|176|192 kHz, codec define: 1
HDMI:EDID found audio format 8 channels DTS, sample rate: 44|48|88|96 kHz, bitrate: 1536 kbps
HDMI:EDID found audio format 4 channels Extended, sample rate: 48 kHz, extended type: DTS
HDMI:EDID found HDMI VSDB length 14
HDMI:EDID HDMI VSDB has physical address 2.2.0.0
HDMI:EDID HDMI VSDB supports AI:yes, dual link DVI:no
HDMI:EDID HDMI VSDB deep colour support - 48-bit:no 36-bit:yes 30-bit:yes DC_yuv444:yes
HDMI:EDID HDMI VSDB max TMDS clock 300 MHz
HDMI:EDID HDMI VSDB content type support: game
HDMI:EDID HDMI VSDB supports extended resolutions 1,2,3,4
HDMI:EDID ignoring non HDMI VSDB with IEEE reg 0xc45dd8
HDMI:EDID extended data block tag 0x06 length 3 not supported
HDMI:EDID extended data block tag 0x05 length 3 not supported
HDMI:EDID extended data block tag VendorSpecificVideo - length 5
HDMI:EDID extended data block YCbCr420CapMap - length 3
HDMI:EDID found Video Capability DB length 2
HDMI:EDID video capability: CE:3 IT:3 PT:0 QS:1
HDMI:EDID adding mandatory support for DMT (4) 640x480p @ 60Hz
HDMI:EDID adding mandatory support for CEA (1) 640x480p @ 60Hz
HDMI:EDID adding mandatory support for CEA (2) 720x480p @ 60Hz
HDMI:EDID adding mandatory support for CEA (17) 720x576p @ 50Hz
HDMI:EDID filtering formats with pixel clock unlimited MHz or h. blanking unlimited
HDMI:EDID best score mode initialised to CEA (1) 640x480p @ 60 Hz with pixel clock 0 MHz (score 25)
HDMI:EDID best score mode is now CEA (1) 640x480p @ 60 Hz with pixel clock 25 MHz (score 61864)
HDMI:EDID best score mode is now CEA (2) 720x480p @ 60 Hz with pixel clock 27 MHz (score 66472)
HDMI:EDID CEA mode (3) 720x480p @ 60 Hz with pixel clock 27 MHz has a score of 66472
HDMI:EDID best score mode is now CEA (4) 1280x720p @ 60 Hz with pixel clock 74 MHz (score 135592)
HDMI:EDID DMT mode (4) 640x480p @ 60 Hz with pixel clock 25 MHz has a score of 18432
HDMI:EDID best score mode is now CEA (5) 1920x1080i @ 60 Hz with pixel clock 74 MHz (score 149416)
HDMI:EDID CEA mode (7) 1440x480i @ 60 Hz with pixel clock 27 MHz has a score of 45736
HDMI:EDID best score mode is now CEA (16) 1920x1080p @ 60 Hz with pixel clock 148 MHz (score 273832)
HDMI:EDID CEA mode (17) 720x576p @ 50 Hz with pixel clock 27 MHz has a score of 66472
HDMI:EDID CEA mode (18) 720x576p @ 50 Hz with pixel clock 27 MHz has a score of 66472
HDMI:EDID CEA mode (19) 1280x720p @ 50 Hz with pixel clock 74 MHz has a score of 117160
HDMI:EDID CEA mode (20) 1920x1080i @ 50 Hz with pixel clock 74 MHz has a score of 128680
HDMI:EDID CEA mode (22) 1440x576i @ 50 Hz with pixel clock 27 MHz has a score of 45736
HDMI:EDID CEA mode (31) 1920x1080p @ 50 Hz with pixel clock 148 MHz has a score of 232360
HDMI:EDID CEA mode (32) 1920x1080p @ 24 Hz with pixel clock 74 MHz has a score of 124532
HDMI:EDID CEA mode (33) 1920x1080p @ 25 Hz with pixel clock 74 MHz has a score of 128680
HDMI:EDID CEA mode (34) 1920x1080p @ 30 Hz with pixel clock 74 MHz has a score of 149416
HDMI:EDID DMT mode (35) 1280x1024p @ 60 Hz with pixel clock 108 MHz has a score of 103643
HDMI:EDID DMT mode (36) 1280x1024p @ 75 Hz with pixel clock 135 MHz has a score of 24576
HDMI:EDID DMT mode (42) 1400x1050p @ 60 Hz with pixel clock 121 MHz has a score of 88200
HDMI:EDID DMT mode (48) 1440x900p @ 75 Hz with pixel clock 136 MHz has a score of 24300
HDMI:EDID DMT mode (51) 1600x1200p @ 60 Hz with pixel clock 162 MHz has a score of 115200
HDMI:EDID DMT mode (52) 1600x1200p @ 65 Hz with pixel clock 175 MHz has a score of 31200
HDMI:EDID DMT mode (54) 1600x1200p @ 75 Hz with pixel clock 202 MHz has a score of 36000
HDMI:EDID DMT mode (58) 1680x1050p @ 60 Hz with pixel clock 146 MHz has a score of 130840
HDMI:EDID DMT mode (82) 1920x1080p @ 60 Hz with pixel clock 148 MHz has a score of 149416
HDMI:EDID DMT mode (83) 1600x900p @ 60 Hz with pixel clock 108 MHz has a score of 111400
HDMI:EDID DMT mode (85) 1280x720p @ 60 Hz with pixel clock 74 MHz has a score of 80296
HDMI:EDID best score mode is now CEA (93) 3840x2160p @ 24 Hz with pixel clock 297 MHz (score 423130)
HDMI:EDID best score mode is now CEA (94) 3840x2160p @ 25 Hz with pixel clock 297 MHz (score 439720)
HDMI:EDID best score mode is now CEA (95) 3840x2160p @ 30 Hz with pixel clock 297 MHz (score 522664)
HDMI:EDID CEA mode (96) 3840x2160p @ 50 Hz with pixel clock 594 MHz has a score of 356776
HDMI:EDID best score mode is now CEA (97) 3840x2160p @ 60 Hz with pixel clock 594 MHz (score 5622196)
HDMI:EDID CEA mode (98) 4096x2160p @ 24 Hz with pixel clock 297 MHz has a score of 224065
HDMI:EDID CEA mode (100) 4096x2160p @ 30 Hz with pixel clock 297 MHz has a score of 273831
HDMI:EDID CEA mode (101) 4096x2160p @ 50 Hz with pixel clock 594 MHz has a score of 190888
HDMI:EDID CEA mode (102) 4096x2160p @ 60 Hz with pixel clock 594 MHz has a score of 224065
HDMI0:EDID preferred mode remained as CEA (97) 3840x2160p @ 60 Hz with pixel clock 594 MHz
HDMI:EDID has HDMI support and audio support
edidparser exited with code 0

Display More

I think the last line is relevant which is showing that all should work:

Code

HDMI0:EDID preferred mode remained as CEA (97) 3840x2160p @ 60 Hz with pixel clock 594 MHz

So please I hope anyone can help!!

kimosak · October 27, 2021 at 11:10 AM

Hello, I have very similar issue with my RPi4b 4GB and LG4K TV model 2021

Everything works fine only when TV is still running, once I switch off TV and than switch on again, there is message no signal and I have to reboot RPi4. This issue appears only with hdmi_enable_4kp60=1 flag in config.txt. Any idea how to fix this and having 4k 60Hz?

No issues with 4k30 or FHD

**HiassofT** · October 27, 2021 at 1:31 PM

This is a known issue which is even mentioned in the release notes https://libreelec.tv/2021/08/26/libreelec-matrix-10-0/

Quote

4K50/60 output is supported by the driver, but has some known issues (eg “no signal” when TV is put into standby and back on)

It'll be fixed in LE 10.0.1

so long,

Hias

RPi4B no Signal on Samsung TV after Switching Inputs

RE: LibreElec 9.95.4 on Raspberry Pi 4 with Argon One V2 case - HDMI problems

tvservice doesn't find the connected monitor

RE: No video output from new RPi4b

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