[mythtv-users] Ticket #10414

[Scott & Nicole Harris]

> I see that ticket #10414 is marked as “fixed”, so I booted in to my laptop’s 
> test setup running
>Mythbuntu 11.10 which has 0.25 installed via Mythbuntu’s repos.  I ran the 
>update
>manager and installed the >most current version and tested it out.  I still 
>have no resolution
>to the issue; when recording more than one thing at a time, the resulting 
>recordings are terrible,
>if I try to start 3 recordings, the first two >immediately fail and stop 
>recording, etc.

>The fix committed for that ticket corrected an issue where the recording 
>quality loop was
>causing an excessive amount of context switches, resulting in an excessive 
>amount of
> wasted CPU usage.  The assumption was that this high CPU load was causing 
> systems with
>small UDP receive windows to get starved for resources, and start 
>discarding data.
> Following that, it was assumed the lost data issues would be resolved when 
> the
>CPU load was resolved.  Are you seeing normal CPU usage, but still 
>experiencing the data loss?

CPU usage does seem better.  What I am experiencing is I am able to start 2 
recordings, but they will  have frequent "drop outs" like poor antenna 
signal.  If I attempt to start a 3rd recording, the first 2 will stop.  If 
they don't stop, they will be completely unwatchable, like one long drop 
out.

I will say, that I am testing this on my laptop which isn't exactly a 
powerhouse, but should suffice (Dual Core Pentium 2.10, 4GB ram).  I am also 
trying to do this on a small partition (15GB) on a SSD so everything (DB, 
recordings, OS, etc) is happening on one disk.  I also only have one of my 
HDHRs connected to this test laptop so I don't mess with units that are 
possibly in use on my main setup, so most of my testing has to be done using 
multirec.

Perhaps I need to wait until I upgrade my main system to 0.25 to adequately 
evaluate.  I am waiting for Mythbuntu 12.04 to do that because when I tried 
upgrading my 10.04 main systems a couple weeks ago, none of the menu 
commands in MythMusic woked...on any of my 4 10.04 front ends.  The commands 
do however work fine on my fresh 11.10 laptop test setup, so I am assuming 
it's a 10.04 thing.