[mythtv-users] Black screen after idle

[DryHeat122]

On Sun, Aug 16, 2020, 4:28 PM Jim Abernathy <jfabernathy at gmail.com> 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
>
@greg, yes all the screensaver and sleep options are off.  It wasn't doing
this with Ubuntu 16.04/Myth 28, so I don't think it's hardware.  Maybe a
driver.  @jim I will try the lightdm trick next time it happens.

>
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