[mythtv-users] Black screen after idle

Mike Carron jmcarron at gmx.com
Mon Aug 17 04:06:22 UTC 2020


On 8/16/20 4:25 PM, Jim Abernathy wrote:
>
>
> On 8/16/20 6:57 PM, DryHeat122 wrote:
>> I recently upgraded to Ubuntu 18.04/Myth 31.  I leave the frontend
>> running all the time and just turn off the monitor when I'm not
>> watching anything.  Twice now, the following has happened.  After the
>> system has sat idle for some time (overnight this time) I turn on the
>> monitor and the screen is black.  I cannot change to a terminal
>> window with ctl-alt-F2.  However, I can SSH to the myth box from
>> another machine and issue terminal commands just fine.  Rebooting
>> fixes the problem.  I have all the screen-saver and sleep
>> functionality turned off, and the monitor works fine on other inputs,
>> so I don't think it's either of those things.
>>
>> I have searched the black screen symptom and the threads I find (for
>> example this one
>> <https://askubuntu.com/questions/1085807/black-screen-after-installation-of-ubuntu-18-04>)
>> are about this problem happening at boot, not after the machine has
>> been sitting idle for some time.  It also doesn't happen
>> consistently, maybe twice in the last couple weeks.
>>
>> Has anyone experienced this problem before?  Any pointers for how to
>> fix or troubleshoot? Thanks......Steve
>
> I've fought this problem off and on for many years and releases of
> *buntu and mythtv.
>
> IMHO it's a linux problem. too many things control the power options.
> On some systems I install the screensave and then disable it.  On
> others I use the power settings. Generally I've found that I enable
> the screensaver but set the time to never works the best.
>
> There are just too many things that seem to have access to control the
> screen off and on.
>
> I have on occasions control-alt-F1 then logged in and restarted
> lightdm to fix it without rebooting. sudo systemctl restart lightdm
>
> Jim A
>
> ***

I have the same issue (Ubuntu 18.04/Myth30) but in my case hitting the
Enter button on the remote restores normal operation so I haven't paid
much attention.

mike

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