[mythtv-users] 2005 laptop stutters after upgrade from 0.27 to 0.28

[Mark Perkins]

On 07/06/17 08:09, faginbagin wrote:
> Yep, I've still got a few old laptops that have been working quite 
> well as frontends. But one isn't performing quite as well with mythtv 
> 0.28 and mythbuntu 16.04 as it is with mythtv 0.27 and mythbuntu 
> 12.04. So, I'm trying to understand why, and whether there's anything 
> I can do to get it to perform running 0.28 as well as it does running 
> 0.27. The laptop and the master backend have multiple boot partitions, 
> so that's how I switch back and forth between 0.27 and 0.28
>
> ...snip...
>
> Has anyone else noticed a degradation in performance on older hardware 
> after upgrading?
>
> Any suggestions on how to identify the cause, e.g. OS module, X driver 
> or mythtv?
>
> _______________________________________________
>

Just brainstorming a bit here:
- was the 16.04 install a clean install or a dist-upgrade from 12.04? If 
clean install have you checked the judder free and frame display timing 
steps again? https://www.mythtv.org/wiki/User_Manual:JudderFree and 
https://www.mythtv.org/wiki/Frame_display_timing
- maybe try cutting mythtv out of the equation for a bit. Move a 
recording to local drive and compare playback in VLC using both 12.04 
and 16.04 and look for any differences.
- maybe try a "complex" transcode on the local test file using ffmpeg on 
both 12.04 and 16.04 to see if that shows a significant difference or 
not (something to make the laptop sweat / work hard so small differences 
might be more readily noticed).