[mythtv] Mythfrontend locks up on android

[myth tv]

On Thu, May 16, 2019 at 9:38 AM Mark Spieth <mark at digivation.com.au> wrote:
>
>
> On 16/05/2019 8:50 am, John P Poet wrote:
>
> On Wed, May 15, 2019 at 4:45 PM Peter Bennett <pb.mythtv at gmail.com> wrote:
>>
>> My android frontend on fire 4K occasionally (once or twice a week),
>> locks up and needs to be restarted. This does not happen during
>> playback, but often after ending playback when the dialog comes up
>> asking whether to delete or save the recording. It also happens randomly
>> at other times in the GUI.
>>
>> Has anybody else seen this?
>
>
> Yes, on the Shield, but only with the apk I got from you.  I have not had time to try and build a new apk myself and I was going to do that before reporting the issue.
>
> Mine has been pretty stable on the shield since enabling background mode. This is what requires force stop. It also allows fast recovery after sleep. I havent need force stop for quite a while now as recovery is fast and this was the only reason I needed force stop in the past.
>
> I do see an issue where playback pauses after it has been running (though not playback continuously) for a long while (multiple days). A shutdown of myth and then restart fixes this. I suspect this is due to a leak somewhere. On linux mythfrontend in top uses 10.9 G of virtual mem but I dont know where this is required.
>
> I did try on my H96pro (S912 based) a few weeks back and was less than successful. I suspect ram bus performance is an issue contributing to this. I can make this apk available if required but should be equivalent to peter's (apr 25).
>>
>> It used to be that I could just press "Home" on the remote and mythtv
>> would be killed. With the latest code I have to go into setup
>> applications and "force stop" before it can restart.
>
>
> Yes, for this specific problem, I am seeing the same.
>
>>
>> Possibly the hangs could be due to a bad wifi connection. Sometimes the
>> fire stick loses the wifi connection. Perhaps I should revert to an
>> ethernet connection, however the fire stick has a habit of forgetting it
>> has ethernet and needing a reboot to see the ethernet attachment again.
>
>
> My shield is hard-wired.  I am not using Wifi with it.
>
> I am also using wired network.
>
> I havent tried the render branch yet.
>
> Mark
>
>
>
>>
>> I am not sure how to debug this as it is not easily reproduced. When it
>> does happen I am not in a position to start a debugging session.
>
>
> I had it happen several times in a row, and then it has been well behaved since then.  However, I have not had time to use it much so I cannot report on a good sampling.
>
> John
>
Not sure whether relevant to discussion but I experienced random
lockups when using the Shield frontend (both wired and wireless) using
pre-built apk's from Peter which did not occur on other frontends.
I eventually tracked it down to "optimisations" in the sql server on
the backend (Mysql).  I have removed these optimisations and use a
more or less stock Ubuntu configuration.  That was two months ago and
since then not a single lockup.  Not sure whether the sql libraries or
default settings used in the Android builds behave differently to
Linux frontends?
Andrew