[mythtv-users] Sudden choppy playback

[Damian]

Hi All,

After updating my system (will I ever learn!) playback has suddenly gone 
very choppy on my main frontend. It's an old Liva mini computer that I 
plug into my projector.

Playback has been fine for years. It uses onboard Intel graphics.

My first thought was Myth, so I've tried playing videos outside of 
MythTV. They are still choppy (I guess that makes this an off-topic 
post, but it's all related to video playback, so hopefully no one minds).

I then wondered if the LAN connection was struggling, so I moved some 
files onto the Liva box. They still play choppy.

This is what "vainfo" returns.

libva info: VA-API version 1.5.0
libva info: va_getDriverName() returns 0
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so
libva info: Found init function __vaDriverInit_1_4
libva info: va_openDriver() returns 0
vainfo: VA-API version: 1.5 (libva 2.5.0)
vainfo: Driver version: Intel i965 driver for Intel(R) Bay Trail - 2.3.0
vainfo: Supported profile and entrypoints
       VAProfileMPEG2Simple            :    VAEntrypointVLD
       VAProfileMPEG2Simple            :    VAEntrypointEncSlice
       VAProfileMPEG2Main              :    VAEntrypointVLD
       VAProfileMPEG2Main              :    VAEntrypointEncSlice
       VAProfileH264ConstrainedBaseline:    VAEntrypointVLD
       VAProfileH264ConstrainedBaseline:    VAEntrypointEncSlice
       VAProfileH264Main               :    VAEntrypointVLD
       VAProfileH264Main               :    VAEntrypointEncSlice
       VAProfileH264High               :    VAEntrypointVLD
       VAProfileH264High               :    VAEntrypointEncSlice
       VAProfileH264StereoHigh         :    VAEntrypointVLD
       VAProfileVC1Simple              :    VAEntrypointVLD
       VAProfileVC1Main                :    VAEntrypointVLD
       VAProfileVC1Advanced            :    VAEntrypointVLD
       VAProfileNone                   :    VAEntrypointVideoProc
       VAProfileJPEGBaseline           :    VAEntrypointVLD

I've tried playing without vaapi, but that's even worse.

My current best guess is that a new video driver probably works great 
for new hardware, but has broken things from my older hardware. Does 
that sound likely?

If so, how can I try older drivers (I'm happy copying and pasting lines 
into the terminal, but that's about as far as my terminal knowledge goes)?

What do you think?

Thanks,
Damian