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<div class="moz-cite-prefix">Thanks John,</div>
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<div class="moz-cite-prefix"> This issue is now resolved as far
as I can tell. I removed the left-over /usr/lib/x86_64-linux-gnu/dri/nvidia_drv_video.so,
installed nvidia-vaapi-driver and recompiled myth-0.35 with VAAPI
: no more crashes.</div>
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<div class="moz-cite-prefix">Alain</div>
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<div class="moz-cite-prefix">On 1/2/26 18:12, Alain via mythtv-users
wrote:<br>
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cite="mid:6181465c-ee08-489b-a29d-da6d3c1fc14c@abrossard.ch">
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<div class="moz-cite-prefix">On 1/2/26 17:42, John Hoyt wrote:<br>
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cite="mid:CAE8sghQsZGaR2jCRyVAHhf7AQmFKbw0++L6_mvt4P08yt3nQpg@mail.gmail.com">
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<div dir="ltr" class="gmail_attr">On Fri, Jan 2, 2026 at
11:32 AM Alain via mythtv-users <<a
href="mailto:mythtv-users@mythtv.org"
moz-do-not-send="true" class="moz-txt-link-freetext">mythtv-users@mythtv.org</a>>
wrote:<br>
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<div>On 1/2/26 17:15, John Hoyt wrote:<br>
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<div dir="ltr">On Fri, Jan 2, 2026 at 11:10 AM Alain
via mythtv-users <<a
href="mailto:mythtv-users@mythtv.org"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">mythtv-users@mythtv.org</a>>
wrote:</div>
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<p> So next, recompile myth without VAAPI,
or figure out why using dkms would make a
difference from using apt.</p>
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<div>The dkms suggestion was more from me being
bit by the kernel upgrade process not completing
fully leaving bad modules in place. It was a
long shot, but worth trying.</div>
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<p>Thanks, I do believe I had a similar experience in
the past.</p>
<p> I've now recompiled mythtv with --disable-vaapi
and without --disable-vdpau. I no longer get a core
dump from mythfrontend.</p>
<p>Not being an expert, I don't know what the next step
might be or should be.</p>
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<div>Another couple ideas, did the ubuntu upgrade remove (or
not update) the nvidia-vaapi-driver? Also, did Ubuntu
possibly switch you from Xorg to Wayland?</div>
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<p>Thanks John, I believe you had the right idea about VAAPI.</p>
<p>Definitely Xorg, not Wayland.</p>
<p>mytv[32] apt list nvidia-vaapi-driver<br>
Listing... Done<br>
nvidia-vaapi-driver/noble 0.0.8-1 amd64<br>
</p>
<p> So not installed, but it only holds one file :</p>
<p>nvidia-vaapi-driver:
/usr/lib/x86_64-linux-gnu/dri/nvidia_drv_video.so<br>
</p>
<p> Of which, I have a left-over :</p>
<p>root%mytv[27] ls -l
/usr/lib/x86_64-linux-gnu/dri/nvidia_drv_video.so<br>
-rw-r--r-- 1 alain alain 93056 jan 3 2021
/usr/lib/x86_64-linux-gnu/dri/nvidia_drv_video.so<br>
</p>
<p> So tomorrow, remove, the old nvidia_drv_video.so,
recompile with VAPPI, retry, and install nvidia-vaapi-driver if
required.</p>
<p>Alain</p>
<br>
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