[mythtv-users] MythTV 29.1 nVidia video jump hesitation with 5.15 kernel

[Stephen Worthington]

On Mon, 24 Jan 2022 14:16:00 -0500, you wrote:

>This is a tough one, and I tend to doubt anyone will have any ideas,
>but I figured I'd throw it out there:
>
>For reasons I won't get into, I'm still running MythTV 29.1. This is
>under Gentoo and the frontend is an x86 (32 bit) machine with a GT 430
>nVidia card, using nvidia-drivers-390.147, and using vdpau. Currently
>I have both the 5.10.93 and 5.15.16 Linux kernels installed. When I
>use the 5.15 kernel...and ONLY with that kernel...I'm getting odd
>video/audio hesitations when jumping forward or back, and only in
>MythTV. That is, I can't reproduce this in xine or mpv. This occurs
>both with TV records as well as h264 videos in browse mode reading
>from the local disk.
>
>Specifically, when I jump forward or back, there's a momentary
>hesitation before the audio kicks in, and during that short time, the
>video gets a little wonky, like it's slowing down for a second. In the
>5.10 kernel everything's fine. Sort of really sucks. For now I'm just
>sticking with the 5.10 kernel. If anyone has any ideas I'd appreciate
>it. Thanks!
>
>Tom

The Nvidia 390 drivers are "legacy" and support for them is limited.
Support ends at the end of 2022.  I suspect that they have not been
properly updated for the 5.15 kernels.  If you file a bug report with
Nvidia, it is possible that they may do something about it, but even
if they do, support for your GT 430 card ends at the end of 2022 with
the end of support for the 390 drivers.  The current 470 drivers do
not support cards older than the 600 series.  So if you want to keep
on updating the kernels on your frontend box, you will need to replace
the GT 430 with something more modern that will be supported, such as
a GT 1030.

And support for 32-bit mode is also going away fairly rapidly at the
moment in a lot of distros.  I have no idea what is planned for Gentoo
though.