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<div class="moz-cite-prefix">On 3/3/2020 10:17 AM, Greg Oliver
wrote:<br>
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cite="mid:CAF4tN+85LXHR5XEofXbzg9SaK6qCzrNF4YSWH+gY-thFzLv+eg@mail.gmail.com">
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<div class="gmail_default"
style="font-family:monospace,monospace"><span
style="font-family:Arial,Helvetica,sans-serif">On Tue, Mar
3, 2020 at 8:51 AM Allen Edwards <<a
href="mailto:allen.p.edwards@gmail.com"
moz-do-not-send="true">allen.p.edwards@gmail.com</a>>
wrote:</span><br>
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<div dir="ltr" class="gmail_attr">On Tue, Mar 3, 2020 at
2:16 AM John <<a
href="mailto:jksjdevelop@gmail.com" target="_blank"
moz-do-not-send="true">jksjdevelop@gmail.com</a>>
wrote:<br>
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<div>On 02/03/2020 16:39, Allen Edwards wrote:<br>
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<div dir="ltr" class="gmail_attr">On Mon, Mar
2, 2020 at 7:15 AM John <<a
href="mailto:jksjdevelop@gmail.com"
target="_blank" moz-do-not-send="true">jksjdevelop@gmail.com</a>>
wrote:<br>
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<div>On 02/03/2020 14:41, Allen Edwards
wrote:<br>
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<div dir="ltr" class="gmail_attr">On
Mon, Mar 2, 2020 at 2:19 AM John
<<a
href="mailto:jksjdevelop@gmail.com"
target="_blank"
moz-do-not-send="true">jksjdevelop@gmail.com</a>>
wrote:<br>
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<div>On 02/03/2020 01:48,
Allen Edwards wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">I continue
my search for why my
mythfrontend is locking
up. As I have said, the
real bother is that it
basically requires a
restart of the computer
to clear up the problem
as I have discussed
previously.
<div><br>
</div>
<div>The error I am
seeing in the log is
this </div>
<div><b>Decoder timed
out waiting for free
video buffers</b><br>
<div><br>
</div>
<div>What I have found
is that several
others have had this
problem and have
isolated it to VDPAU
with an interlaced
source. We had a
lock up again last
night and sure
enough the source
was 1080i and the
output is 1080p.</div>
<div><br>
</div>
<div>There does not
seem to be a
solution online that
I can find.</div>
<div><br>
</div>
<div>Here is one
thread <a
href="https://forum.mythtv.org/viewtopic.php?t=2735"
target="_blank"
moz-do-not-send="true">https://forum.mythtv.org/viewtopic.php?t=2735</a></div>
<div>Here is another <a
href="https://devtalk.nvidia.com/default/topic/1037255/linux/mythtv-errors-lockups-with-vdpau-and-340-or-390-drivers-/"
target="_blank"
moz-do-not-send="true">https://devtalk.nvidia.com/default/topic/1037255/linux/mythtv-errors-lockups-with-vdpau-and-340-or-390-drivers-/</a></div>
<div><br>
</div>
<div>My question is,
am I using the right
driver and video
configuration? Next
question, what
should I use if
VDPAU is
unacceptable?</div>
<div><br>
</div>
<div>
<div>I am running <span>Mythbuntu</span> </div>
<div>Ubuntu <span>16.04</span>.1
LTS</div>
</div>
<div>MythTV Version :
v0.28.2-6-g9031599<br>
</div>
<div>MythTV Branch :
fixes/0.28<br>
</div>
<div>AMD Athlon(tm) 64
X2 Dual Core
Processor 5400+<br>
</div>
<div>6G memory</div>
<div>GeForce GTX 750Ti</div>
<div>nvidia 390 driver</div>
<div>VDPAU High
Quality</div>
<div><br>
</div>
<div>Allen</div>
</div>
</div>
<br>
<fieldset></fieldset>
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</pre>
</blockquote>
<p>I have found that using
High Quality software
decoding to be more
reliable and tolerates
faults in the broadcast
stream. The cpu load is
only moderate - try it.<br>
</p>
<p>By the way this issue is
still present in V31 so
upgrading will not help.</p>
</div>
</div>
</blockquote>
<div><br>
</div>
<div>Thanks so much for the
confirmation of the issue. I
have been wondering about using
software but wasn't sure my CPU
could handle it. What specific
settings do you recommend?</div>
<div><br>
</div>
<div>Allen </div>
</div>
</div>
<br>
<fieldset></fieldset>
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</pre>
</blockquote>
<p>I am on ver 31 using Opengl High
Quality and cant remember the exact
settings for V28 but I think there was
a High Quality choice in
Setup>Video>Playback>Current
Video Playback Profile</p>
<p>You should get ffmpeg decoding and if
I remember correctly vdpau double
de-interlacer.</p>
<p>That config never failed for me on a
combined Intel Haswell front and
backend with Nvidia graphics.</p>
<p>Note i still get judder with software
decoding if there are background tasks
running so avoid that.</p>
</div>
</div>
</blockquote>
<div><br>
</div>
<div>I tried "High Quality" and so far it
looks good picture quality wise.</div>
<div><br>
</div>
<div>I took a look at the CPU load using top
and I find that strange.</div>
<div>Mythfrontend with VDPAU runs about 9% and
with High Quality about 29%. That seems
fine.</div>
<div>Xorg is what I find strange. With VDPAU
it runs about 2% and with High Quality it
runs all over the place. I have seen as low
as 6% and as high as 96% </div>
<div><br>
</div>
<div>I guess this is OK as long as nothing is
pinned at 100% and I see that mythcomflag is
able to get in there and it only uses left
overs so I guess all is good.</div>
<div><br>
</div>
<div>If there was just an easy way to restore
operation after a lock up like there was
when I was running Mythbuntu 8 we could live
with the occasional lock-ups which happen
about once a month. I modified several
things so that CTRL-ALT-BS will restart X
but it does not work when mythfrontend is
locked up. Basically, only "shutdown now -r"
works in that case.</div>
<div><br>
</div>
<div>Thanks for the help. We will try High
Quality and see how it goes.</div>
<div><br>
</div>
<div>Allen</div>
</div>
</div>
<br>
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</pre>
</blockquote>
<p>killall mythfrontend</p>
<p>repeat</p>
<p>killall mythfrontend</p>
<p>has always got rid of a hung Frontend for me put
it in a script.<br>
</p>
<p>Similarly </p>
<p>If you add "/bin/systemctl restart
mythbackend.service" to your visudo file then the
backend can be reset easily without a password.</p>
<p>If the backend does not restart quickly add</p>
<p>TimeoutStopSec=10</p>
<p>to the [Service] section as described in <a
href="https://www.mythtv.org/wiki/Systemd_mythbackend_Configuration"
target="_blank" moz-do-not-send="true">https://www.mythtv.org/wiki/Systemd_mythbackend_Configuration</a></p>
</div>
</blockquote>
<div><br>
</div>
<div>What happens after repeated kill -9 <pid of
mythfrontend> is that Xorg is hung and running at
cpu of 100%. After repeated kill -9 of that eventually
it killed. Process took 5 minutes. Nothing killed
right away. Then mythfrontend immediately locked up
again when she started the show again. Doing a
systemctl restart display-manager also just hangs up
the entire gui. I can still access the computer
remotely but the gui is toast. I use top to see that
Xorg is at 100% and basically eventually do a shutdown
to clear things up.</div>
</div>
</div>
</blockquote>
<div><br>
</div>
<div>
<div class="gmail_default"
style="font-family:monospace,monospace">I cannot comment
on why X misbehaves - over the years, especially with
nVidia drivers and Xorg mesa version combos, it just
happens. It would be a good time to start using lirc and
the irexec app. It allows you to assign a script to kill
anything you want to a remote control button.</div>
<div class="gmail_default"
style="font-family:monospace,monospace"><br>
</div>
<div class="gmail_default"
style="font-family:monospace,monospace">I have not used it
in quite some time, so I do not have my config any longer,
but I used it for this exact purpose a couple years back
(and 8+ years prior). I am fairly certain I have posted
the config to this list in the past though if you search
the archives. There should be a script to kill the
frontend (and restart X if needed) and restart the
frontend along with the lirc configuration. </div>
<br>
</div>
<div> </div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
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<div class="gmail_quote">
<div>I notice that there is some tearing with High
Quality but it is slight. Would be nice if CTL-ALT-BS
would work when the system is hung like it does when
it is not locked up. I did a lot of work to make
CTL-ALT-BS restart things clean. I start mythfrontend
directly and not as a service. Without that every time
I do CTL-ALT-BS I would get another instance of
mythfrontend.</div>
<div><br>
</div>
<div>I would like to use vapau as the system runs cooler
and the performance is better but the hang ups are
just too hard to kill. </div>
<div><br>
</div>
<div>So is there some sub process of Xorg that needs to
be killed that has to do with vapau? Maybe that is the
secret. I just don't know enough and it is hard to
troubleshoot something that happens once a month right
when the wife is in the middle of a show and just
wants the system working again.</div>
<div><br>
</div>
<div>Does this happen to everyone or is it just my old
hardware?</div>
<div><br>
</div>
<div>Allen</div>
<div><br>
</div>
<div><br>
</div>
</div>
</div>
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</blockquote>
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<pre class="moz-quote-pre" wrap="">_______________________________________________
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</pre>
</blockquote>
<br>
This may have nothing to do with it, but VDPAU issues always get my
attention. I spent a bunch of time chasing an antenna problem that
turned out to be a VDPAU playback rendering bug. I ended up
switching to OpenGL, which completely solved my problem (still using
it). For what it's worth, here's the thread,<br>
<br>
Don<br>
<br>
<b>HD Hiomerun works better in HDHomeRun viewer than MythTV</b><br>
<a class="moz-txt-link-freetext" href="https://lists.gt.net/mythtv/users/622871?search_string=HD%20Hiomerun%20works%20better%20in%20HDHomeRun%20viewer%20than%20MythTV;#622871">https://lists.gt.net/mythtv/users/622871?search_string=HD%20Hiomerun%20works%20better%20in%20HDHomeRun%20viewer%20than%20MythTV;#622871</a><br>
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