<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
<p><br>
</p>
<div class="moz-cite-prefix">On 8/16/20 6:57 PM, DryHeat122 wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAM=qwAFVSZj09117oWJ7zgPtNNWS3iH=MbT_y3sxeh_Wb_ARJw@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">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.
<div><br>
</div>
<div>I have searched the black screen symptom and the threads I
find (for example <a
href="https://askubuntu.com/questions/1085807/black-screen-after-installation-of-ubuntu-18-04"
moz-do-not-send="true">this one</a>) 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.
<div><br>
</div>
<div>Has anyone experienced this problem before? Any pointers
for how to fix or troubleshoot? Thanks......Steve</div>
</div>
</div>
</blockquote>
<p>I've fought this problem off and on for many years and releases
of *buntu and mythtv.</p>
<p>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.</p>
<p>There are just too many things that seem to have access to
control the screen off and on.</p>
<p>I have on occasions control-alt-F1 then logged in and restarted
lightdm to fix it without rebooting. sudo systemctl restart
lightdm</p>
<p>Jim A</p>
<p><br>
</p>
</body>
</html>