Screen is black suddenly (again and again)

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systemservice
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Screen is black suddenly (again and again)

Unread post by systemservice » Fri May 03, 2019 6:25 pm

I've got 2x ODROID-N2 (Android Pie 20190404) and (Android Pie 20190425), but only one is connected to a Full-HD monitor (from time to time I switch them).

It happens several times a day that the screen gets black but HDMI signal is available (the screen doesn't go to standby because it recognozes the HDMI signal).
It remains black even if I unplug and plug the HDMI cable again.
Also, the ODROID-N2 remains reachable on the network and I can ADB into it.
I tried to connect it to another monitor when it happened but it didn't help.
I also tried the following in /odm/boot.ini

Code: Select all

setenv suspend_hdmiphy "0"
but it didn't help.
The only thing that helps is a reboot.

I believe that it happens more often if no screen is connected for a while (maybe 30-60 minutes) and than when it gets connected the screen is black.

What is it?

systemservice
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Re: Screen is black suddenly (again and again)

Unread post by systemservice » Tue May 07, 2019 4:24 pm

I've been testing for about 1 week and it's still the same, the screen gets black suddenly, but if no monitor is connected, then it happens very often. However, if a monitor is connected, then it may work for several days until it happens.
When it happens, the device itself is working and I'm able to take a screenshot thru ADB on the command line with

Code: Select all

/system/bin/screencap -p /sdcard/screenshot.png
and it shows the GUI as it has to be.
Also, the monitor receives the signal and doesn't go to standby (the screen is black, but you can see the background light of the monitor and the green LED).

Did anybody experience this issue?

atwar
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Re: Screen is black suddenly (again and again)

Unread post by atwar » Tue May 07, 2019 7:52 pm

I have the same problem but only when I turn off TV and listen music via Home Theatre. When I turn on
TV, screen is black, but all others working properly.
Of course setenv suspend_hdmiphy "0" didn't help.
Only one method to resolve problem is reboot.

systemservice
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Re: Screen is black suddenly (again and again)

Unread post by systemservice » Fri May 10, 2019 7:30 pm

It seems to be fixed in Android PIE (20190509).

Fabien
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Re: Screen is black suddenly (again and again)

Unread post by Fabien » Tue May 14, 2019 4:42 pm

I have exactly the same issue. Screen is black but a signal is send to my monitor.
I am using Android PIE (20190509) so I don't think this issue have been resolved in this version.

systemservice
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Re: Screen is black suddenly (again and again)

Unread post by systemservice » Tue May 14, 2019 4:47 pm

In my case it doesn't happen anymore since updating to Android PIE (20190509). Did you try setenv suspend_hdmiphy "0" as I did in my first post?

Fabien
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Re: Screen is black suddenly (again and again)

Unread post by Fabien » Tue May 14, 2019 5:06 pm

No, I didn't tried with setenv suspend_hdmiphy "0". I am going to test it and let you know the result.

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Re: Screen is black suddenly (again and again)

Unread post by Fabien » Tue May 14, 2019 10:22 pm

All is working well with setenv suspend_hdmiphy "0". Thanks a lot for your help.

linuxo
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Re: Screen is black suddenly (again and again)

Unread post by linuxo » Thu May 16, 2019 5:58 pm

We are also having this issue,

Version: odroidn2 20190509
Display: Samsung DB22D-P
Display Mode: 1080p60hz

The display turns black after some time, a restart of odroid is needed.
Will try setenv suspend_hdmiphy "0" now.

kafan1986
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Re: Screen is black suddenly (again and again)

Unread post by kafan1986 » Sun Sep 08, 2019 2:25 am

linuxo wrote:
Thu May 16, 2019 5:58 pm
We are also having this issue,

Version: odroidn2 20190509
Display: Samsung DB22D-P
Display Mode: 1080p60hz

The display turns black after some time, a restart of odroid is needed.
Will try setenv suspend_hdmiphy "0" now.
Did you solve this issue?

linuxo
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Re: Screen is black suddenly (again and again)

Unread post by linuxo » Sat Sep 21, 2019 1:25 am

kafan1986 wrote:
Sun Sep 08, 2019 2:25 am
Did you solve this issue?
No, I don't know how to fix this issue.

MInahowoski
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Re: Screen is black suddenly (again and again)

Unread post by MInahowoski » Thu Oct 10, 2019 4:33 am

I have the same issue.
These users thanked the author MInahowoski for the post:
linuxo (Sat Oct 19, 2019 8:08 am)

deuteragenie
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Re: Screen is black suddenly (again and again)

Unread post by deuteragenie » Sat Oct 12, 2019 2:51 am

Same issue on Ubuntu. Screen goes black after ca.30 minutes.

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