<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta content="text/html;charset=UTF-8" http-equiv="Content-Type"></head><body ><div style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 10pt;"><div><br></div><br><div data-zbluepencil-ignore="true" style="" class="zmail_extra"><br><div id="Zm-_Id_-Sgn1">---- On Tue, 03 Mar 2020 06:49:21 -0800 <b>Allen Edwards <allen.p.edwards@gmail.com></b> wrote ----<br></div><br><blockquote style="border-left: 1px solid rgb(204, 204, 204); padding-left: 6px; margin: 0px 0px 0px 5px;"><div><div dir="ltr"><div dir="ltr"><br></div><br><div class="x_-2060460341gmail_quote"><div class="x_-2060460341gmail_attr" dir="ltr">On Tue, Mar 3, 2020 at 2:16 AM John <<a target="_blank" href="mailto:jksjdevelop@gmail.com">jksjdevelop@gmail.com</a>> wrote:<br></div><blockquote style="margin: 0.0px 0.0px 0.0px 0.8ex;border-left: 1.0px solid rgb(204,204,204);padding-left: 1.0ex;" class="x_-2060460341gmail_quote"><div><div>On 02/03/2020 16:39, Allen Edwards
wrote:<br></div><blockquote><div dir="ltr"><div dir="ltr"><br></div><br><div class="x_-2060460341gmail_quote"><div class="x_-2060460341gmail_attr" dir="ltr">On Mon, Mar 2, 2020 at 7:15
AM John <<a target="_blank" href="mailto:jksjdevelop@gmail.com">jksjdevelop@gmail.com</a>>
wrote:<br></div><blockquote style="margin: 0.0px 0.0px 0.0px 0.8ex;border-left: 1.0px solid rgb(204,204,204);padding-left: 1.0ex;" class="x_-2060460341gmail_quote"><div><br><div><div>On 02/03/2020 14:41, Allen Edwards wrote:<br></div><blockquote><div dir="ltr"><div dir="ltr"><br></div><br><div class="x_-2060460341gmail_quote"><div class="x_-2060460341gmail_attr" dir="ltr">On Mon, Mar 2,
2020 at 2:19 AM John <<a target="_blank" href="mailto:jksjdevelop@gmail.com">jksjdevelop@gmail.com</a>>
wrote:<br></div><blockquote style="margin: 0.0px 0.0px 0.0px 0.8ex;border-left: 1.0px solid rgb(204,204,204);padding-left: 1.0ex;" class="x_-2060460341gmail_quote"><div><br><div><br><div>On 02/03/2020 01:48, Allen Edwards
wrote:<br></div><blockquote><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 <br></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.<br></div><div><br></div><div>There does not seem to be a
solution online that I can find.<br></div><div><br></div><div>Here is one thread <a target="_blank" href="https://forum.mythtv.org/viewtopic.php?t=2735">https://forum.mythtv.org/viewtopic.php?t=2735</a><br></div><div>Here is another <a target="_blank" href="https://devtalk.nvidia.com/default/topic/1037255/linux/mythtv-errors-lockups-with-vdpau-and-340-or-390-drivers-/">https://devtalk.nvidia.com/default/topic/1037255/linux/mythtv-errors-lockups-with-vdpau-and-340-or-390-drivers-/</a><br></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?<br></div><div><br></div><div><div>I am running <span>Mythbuntu</span> <br></div><div>Ubuntu <span>16.04</span>.1 LTS<br></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<br></div><div>GeForce GTX 750Ti<br></div><div>nvidia 390 driver<br></div><div>VDPAU High Quality<br></div><div><br></div><div>Allen<br></div></div></div><br><pre>_______________________________________________
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<br></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.<br></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?<br></div><div><br></div><div>Allen <br></div></div></div><br><pre>_______________________________________________
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<br></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<br></p><p>You should get ffmpeg decoding and if I remember
correctly vdpau double de-interlacer.<br></p><p>That config never failed for me on a combined Intel
Haswell front and backend with Nvidia graphics.<br></p><p>Note i still get judder with software decoding if
there are background tasks running so avoid that.<br></p></div></div></blockquote><div><br></div><div>I tried "High Quality" and so far it looks good picture
quality wise.<br></div><div><br></div><div>I took a look at the CPU load using top and I find that
strange.<br></div><div>Mythfrontend with VDPAU runs about 9% and with High
Quality about 29%. That seems fine.<br></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% <br></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.<br></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.<br></div><div><br></div><div>Thanks for the help. We will try High Quality and see how
it goes.<br></div><div><br></div><div>Allen<br></div></div></div><br><pre>_______________________________________________
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<br></pre></blockquote><p>killall mythfrontend<br></p><p>repeat<br></p><p>killall mythfrontend<br></p><p>has always got rid of a hung Frontend for me put it in a script.<br></p><p>Similarly <br></p><p>If you add "/bin/systemctl restart mythbackend.service" to your
visudo file then the backend can be reset easily without a
password.<br></p><p>If the backend does not restart quickly add<br></p><p>TimeoutStopSec=10<br></p><p>to the [Service] section as described in <a target="_blank" href="https://www.mythtv.org/wiki/Systemd_mythbackend_Configuration">https://www.mythtv.org/wiki/Systemd_mythbackend_Configuration</a><br></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.<br></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.<br></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. <br></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.<br></div><div><br></div><div>Does this happen to everyone or is it just my old hardware?<br></div><div><br></div><div>Allen<br></div></div></div></div></blockquote></div><div><br></div><div>my be/fe hardware is ryzen 2700, nvidia gtx 750ti, 8gig ram, 128gb ssd (os), 2 3tb drives, 2 nas drives, and 128gb nvme (backups). os: archlinux, (kept current), desktop is xfce, mythtv-git pkg from arch-aur. fe/be is fed to tcl 43 inch 4k tv. 2 other fe's (both shields 1-(2015), 1 (2019) models). and use fe's on laptops, use kodi also on everything. i run vdpau high profile on be/fe. i did have the freeze issue from time to time on the be/fe, but not often. when it happened i would ssh in and kill mythfrontend. there is no mythfrontend/mythfrontend.real in the aur package. there was no hang it would return to desktop immediately. about 6 months back, it began freezing more often and the playback would stutter and was not smooth. i tried a variety of things; changing the xorg.conf.d options, desktop settings, power settings and nothing helped. very frustrating. finally i changed out the hdmi cable and switched to arch-repo linux-ck-zen kernel and went back to my xorg conf settings that i had used previously. and since then not a single freeze and playback in vdpau has been perfect. i know it is a very frustrating problem because there are so many variables. you might look at changing your desktop, look into your xorg.conf settings and possibly changing the os. when things got bad, the opengl playback worked fine, but i did not want the higher cpu usage if i could avoid it.<br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div data-zbluepencil-ignore="true" style="" class="zmail_extra"><blockquote style="border-left: 1px solid rgb(204, 204, 204); padding-left: 6px; margin: 0px 0px 0px 5px;"><div><div dir="ltr"><div class="x_-2060460341gmail_quote"><div><br></div><div><br></div></div></div>_______________________________________________<br>mythtv-users mailing list <br><a target="_blank" href="mailto:mythtv-users@mythtv.org">mythtv-users@mythtv.org</a> <br><a target="_blank" href="http://lists.mythtv.org/mailman/listinfo/mythtv-users">http://lists.mythtv.org/mailman/listinfo/mythtv-users</a> <br><a target="_blank" href="http://wiki.mythtv.org/Mailing_List_etiquette">http://wiki.mythtv.org/Mailing_List_etiquette</a> <br>MythTV Forums: <a target="_blank" href="https://forum.mythtv.org">https://forum.mythtv.org</a> <br></div></blockquote></div><div><br></div></div><br></body></html>