Black Screen with 8.95.4.1 and 4k TVs

Help & Support Hardware
31

24 posts were split to a new topic: Green screen 8.95.4.1

32

Since the auto update to this version I have a black screen. I have a Denon XR2100W that the signal is sent through to my Samsung 50 (don’t remember model).

33

A few extra questions to help figure this out.

do the people having this problem have any settings in a /storage/.config/autostart.sh file?

also what is the contents of /sys/devices/virtual/amhdmitx/amhdmitx0/config

and contents of /sys/devices/virtual/amhdmitx/amhdmitx0/disp_cap

and /storage/.kodi/userdata/disp_cap

34

I’m on windows 10. I don’t see the device on the network (haven’t looked before). Do I need putty? Has it booted but just isn’t rendering. I’ll try and get my info if I can connect.

35

yes it has booted, but is not displaying an image. and putty would be required to connect over ssh.

36

to ssh into the device you need to know it’s ip address, or corelec.local might also work as an address to connect to. if you didn’t change the hostname when you set the device up.

login: root
password: coreelec

(password might be libreelec if you have upgraded to coreelec from libreelec at some point in the past without doing a fresh install)

then once you have a command prompt, type

cat /storage/.config/autostart.sh
cat /sys/devices/virtual/amhdmitx/amhdmitx0/config
cat /sys/devices/virtual/amhdmitx/amhdmitx0/disp_cap
cat /storage/.kodi/userdata/disp_cap

will show the contents of those 4 files. then just cut and paste the results from the putty window and post here.

1 Like
37

Only

echo off > /sys/class/leds/librecomputer:system-status/trigger
echo off > /sys/class/leds/librecomputer:blue/trigger

CoreELEC:~ # cat /sys/devices/virtual/amhdmitx/amhdmitx0/config
cur_VIC: 353
VIC: 353 3840x2160p60hz
Colour depth: 10-bit
Colourspace: YUV420
Colour range: limited
EOTF: SDR
YCC colour range: limited
PLL clock: 0xc000029a, Vid clock div 0x000b0000
audio config: on
3D config: off


CoreELEC:~ # cat /sys/devices/virtual/amhdmitx/amhdmitx0/disp_cap
480p60hz
576p50hz
720p60hz
1080i60hz
1080p60hz
720p50hz
1080i50hz
1080p30hz
1080p50hz
1080p25hz
1080p24hz
2160p30hz
2160p25hz
2160p24hz
2160p50hz420
2160p60hz420


CoreELEC:~ # cat /storage/.kodi/userdata/disp_cap
cat: can't open '/storage/.kodi/userdata/disp_cap': No such file or directory

Also I noticed when I downgrade so I can use kodi again (not sure if its supposed to be shorter):

CoreELEC (official): 8.95.3 (LePotato.arm)
CoreELEC:~ # cat /sys/devices/virtual/amhdmitx/amhdmitx0/config
cur_VIC: 353
cur_video_param->VIC=353
cd = 4
cs = 3
audio config: on
3D config: off
38

Hi All,
Sorry for asking again.
Could someone please post the link for download ver. 8.95.4.tar for S912 ?
Big thx
RAD

39

##############################################

CoreELEC

https://coreelec.org

##############################################

CoreELEC (official): 8.95.4.1 (S905.arm)
TVroom:~ # cat /storage/.config/autostart.sh
cat: can’t open ‘/storage/.config/autostart.sh’: No such file or directory
TVroom:~ # cat /sys/devices/virtual/amhdmitx/amhdmitx0/config
cur_VIC: 353
VIC: 353 3840x2160p60hz
Colour depth: 10-bit
Colourspace: YUV420
Colour range: limited
EOTF: SDR
YCC colour range: limited
PLL clock: 0xc000029a, Vid clock div 0x000b0000
audio config: on
3D config: off
TVroom:~ # cat /sys/devices/virtual/amhdmitx/amhdmitx0/disp_cap
480p60hz
576p50hz
720p60hz
1080i60hz
1080p60hz
720p50hz
1080i50hz
1080p30hz
1080p50hz
1080p25hz
1080p24hz
2160p30hz
2160p25hz
2160p24hz
smpte24hz
smpte25hz
smpte30hz
smpte50hz420
smpte60hz420
2160p50hz420
2160p60hz420
TVroom:~ # cat /storage/.kodi/userdata/disp_cap
cat: can’t open ‘/storage/.kodi/userdata/disp_cap’: No such file or directory
TVroom:~ # ##############################################
TVroom:~ # # CoreELEC #
Colourspace: YUV420
Colour range: limited
EOTF: SDR
YCC colour range: limited
PLL clock: 0xc000029a, Vid clock div 0x000b0000
audio config: on
3D config: off
TVroom:~ # cat /sys/devices/virtual/amhdmitx/amhdmitx0/disp_cap
480p60hz
576p50hz
720p60hz
1080i60hz
1080p60hz
720p50hz
1080i50hz
1080p30hz
1080p50hz
1080p25hz
1080p24hz
2160p30hz
2160p25hz
2160p24hz
smpte24hz
smpte25hz
smpte30hz
smpte50hz420
smpte60hz420
2160p50hz420
2160p60hz420
TVroom:~ # cat /storage/.kodi/userdata/disp_cap
cat: can’t open ‘/storage/.kodi/userdata/disp_cap’: No such file or directory
TVroom:~ #
TVroom:~ # # https://coreelec.org #
TVroom:~ # ##############################################
TVroom:~ #
TVroom:~ # CoreELEC (official): 8.95.4.1 (S905.arm)
-sh: syntax error: unexpected word (expecting “)”)
-sh: syntax error: unexpected “)”
TVroom:~ # TVroom:~ # cat /storage/.config/autostart.sh
-sh: TVroom:~: not found
TVroom:~ # cat: can’t open ‘/storage/.config/autostart.sh’: No such file or dire
ctory

TVroom:~ # cat /sys/devices/virtual/amhdmitx/amhdmitx0/config
cur_VIC: 353
VIC: 353 3840x2160p60hz
Colour depth: 10-bit
Colourspace: YUV420
Colour range: limited
EOTF: SDR
YCC colour range: limited
PLL clock: 0xc000029a, Vid clock div 0x000b0000
audio config: on
3D config: off
TVroom:~ # cat /sys/devices/virtual/amhdmitx/amhdmitx0/disp_cap
480p60hz
576p50hz
720p60hz
1080i60hz
1080p60hz
720p50hz
1080i50hz
1080p30hz
1080p50hz
1080p25hz
1080p24hz
2160p30hz
2160p25hz
2160p24hz
smpte24hz
smpte25hz
smpte30hz
smpte50hz420
smpte60hz420
2160p50hz420
2160p60hz420
TVroom:~ # cat /storage/.kodi/userdata/disp_cap
cat: can’t open ‘/storage/.kodi/userdata/disp_cap’: No such file or directory
-sh: cat:: not found
TVroom:~ # TVroom:~ #
-sh: TVroom:~: not found
TVroom:~ #

40

@RAD I don’t have a copy of 8.95.4 for the S912, it’s possible another dev does.
I do have a test image for the s912 that you could try, that might fix the black screen for you.
if you are interested/

41

Hi cdu13a
Thx for your message.
For me also works perfect with 8.95.4.
With 8.95.4.1 i get black screen.
Iam interested, could you please give me your test image?

Big thx
RAD

42

ok give me a little bit and will message the link, which device you have?

43

Ok, big thx.
I have the beelink g1 ultimate box.

44

Will it auto update when the new fix comes out? I assume it will. It auto updated to get to the black screen version.

45

Dont know if my info is needed but here we go:

cat /sys/devices/virtual/amhdmitx/amhdmitx0/edid
Rx Brand Name: GSM
Rx Product Name: LG
Manufacture Week: 1
Manufacture Year: 2017
Physical size(cm): 160 x 90
EDID Version: 1.3
EDID block number: 0x1
blk0 chksum: 0x75
Source Physical Address[a.b.c.d]: 1.1.0.0
YCC support 0x03, VIC (native 255):
ColorDeepSupport 0xb8 10/12/16/Y444 1/1/0/1
16 31 4 19 5 20 3 2 18 32 33 34 21 1 93 94 95 98 99 100 95 94 93 98 353 352 358 357
Audio {format, channel, freq, cce}
{1, 1, 0x7f, 0x07}
{1, 7, 0x7f, 0x07}
{2, 5, 0x07, 0x00}
{7, 6, 0x1f, 0x00}
{9, 5, 0x02, 0x00}
{10, 7, 0x06, 0x00}
{12, 7, 0x7e, 0x00}
{11, 7, 0x54, 0x01}
Speaker Allocation: 0x5f
Vendor: 0xc03
MaxTMDSClock1 300 MHz
ColorMetry: 0xc0
SCDC: 0
RR_Cap: 0
LTE_340M_Scramble: 0
HDR DeepColor
checkvalue: 0x75260000

cat /storage/.config/autostart.sh
(
modprobe em28xx card=94;
echo “2040 8268” > /sys/bus/usb/drivers/em28xx/new_id
)

This modification is necessary to make my dvb device work.

cat /sys/devices/virtual/amhdmitx/amhdmitx0/config
cur_VIC: 353
VIC: 353 3840x2160p60hz
Colour depth: 10-bit
Colourspace: YUV420
Colour range: limited
EOTF: SDR
YCC colour range: limited
PLL clock: 0xc000029a, Vid clock div 0x000b0000
audio config: on
3D config: off

cat /sys/devices/virtual/amhdmitx/amhdmitx0/disp_cap
480p60hz
576p50hz
720p60hz
1080i60hz
1080p60hz
720p50hz
1080i50hz
1080p30hz
1080p50hz
1080p25hz
1080p24hz
2160p30hz
2160p25hz
2160p24hz
smpte24hz
smpte25hz
smpte30hz
smpte50hz420
smpte60hz420
2160p50hz420
2160p60hz420

cat /storage/.kodi/userdata/disp_cap
480p60hz
576p50hz
720p60hz
1080i60hz
1080p60hz
720p50hz
1080i50hz
1080p30hz
1080p50hz
1080p25hz
1080p24hz
2160p30hz
2160p25hz
2160p24hz
smpte24hz
smpte25hz
smpte30hz
smpte50hz420
smpte60hz420
2160p50hz420
2160p60hz420

46

It should auto update once the next release is available. if it does not manually updating is fairly easy.

47

@RAD

Here are test builds for a fix to the black screen issue

builds for the s912

https://github.com/cdu13a/CoreELEC/releases/download/rc1/CoreELEC-S912.arm-8.95.4.2rc1.tar

the s905

https://github.com/cdu13a/CoreELEC/releases/download/rc1/CoreELEC-S905.arm-8.95.4.2rc1.tar

Odroid C2

https://github.com/cdu13a/CoreELEC/releases/download/rc1/CoreELEC-Odroid_C2.arm-8.95.4.2rc1.tar

Le Potato

https://github.com/cdu13a/CoreELEC/releases/download/rc1/CoreELEC-LePotato.arm-8.95.4.2rc1.tar

1 Like
48

Big thx.
I will try and report here.

49

Black screen (“no signal”) on Philips 43PUT4900 with Nexbox x96 s905x with CE 8.95.4.1. Reverted back to 8.95.3 for a while.

# cat /sys/devices/virtual/amhdmitx/amhdmitx0/edid
Rx Brand Name: PHL
Rx Product Name: Philips
Manufacture Week: 32
Manufacture Year: 2015
Physcial size(cm): 128 x 72
EDID Verison: 1.3
EDID block number: 0x1
blk0 chksum: 0xa4
Source Physical Address[a.b.c.d]: 2.0.0.0
native Mode f1, VIC (native 255):
ColorDeepSupport 30
95 94 93 16 31 32 34 33 5 20 4 19 18 3 17 2 22 7 21 6 1 95 94 93 353 352
Audio {format, channel, freq, cce}
{1, 1, 7f, 7}
{2, 5, 7, 0}
{7, 1, 7, 7}
Speaker Allocation: 1
Vendor: 0xc03
MaxTMDSClock1 300 MHz
SCDC: 0
RR_Cap: 0
LTE_340M_Scramble: 0
  DeepColor
checkvalue: 0xa4b80000

In addition to black screen, sometimes notice that “down” key on CEC remote initiates “shutdown” for CE. Didn’t yet figured out, why.

Update: 8.95.4.2rc1 build by cdu13a fixed resolution issue for my setup.

50

Hi cdu13a
Till now look pretty good.
All are working again👍.

Big thx and have a nice day
RAD