<div dir="ltr"><div dir="ltr"><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Mar 3, 2020 at 2:16 AM John <<a href="mailto:jksjdevelop@gmail.com">jksjdevelop@gmail.com</a>> wrote:<br></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>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">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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<blockquote type="cite">
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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">jksjdevelop@gmail.com</a>>
wrote:<br>
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<div>On 02/03/2020 01:48, Allen Edwards
wrote:<br>
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<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">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">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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</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>
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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">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><br></div><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>