[mythtv-users] hangups/slowdowns after upgrade to Ubuntu 18.04/mythtv 29

[Andrew Stadt]

On 01/08/18 09:59 PM, James Linder wrote:
>
>> On 2 Aug 2018, at 12:33 am, mythtv-users-request at mythtv.org wrote:
>>
>>>> My backend system recently died, and as part of the replacement, I decided
>>>> to upgrade from Ubuntu 16.04 and mythtv 0.28 to Ubuntu 18.04 and mythtv
>>> 29.
>>>> Since then I've had several issues. I ironed most of them out, but two
>>>> linger:
>>>> 1) The time between starting playback of a recording and that recording
>>>> actually playing (when it says "Please Wait") is about 8 seconds. It used
>>>> to be about 2 or so.
>>>> 2) When exiting the "Watch Recordings" screen, the frontend will hang for
>>>> about two minutes or so, sometimes longer (it has taken over 5 minutes, at
>>>> which time the WAF got so low I had to restart the frontend rather than
>>>> wait it out).
>>>>
>>>> I've enabled debug-level logging on the front end, but I get literally
>>>> nothing while it waits. I've checked the backend logs as well, but I've
>>>> seen nothing useful there. I've done some searches in the mailing list
>>>> archive, but haven't come up with anything there either.
>>>>
>>>> Any ideas? Logs to look at, settings to check?
>>>>
>>>> Thanks,
>>>>
>>>> Paul
>>> The start playing time could be a hard drive that has to spin up.  You
>>> can use hdparm to see the state of a drive:
>>>
>>> root at mypvr:~# hdparm -C /dev/disk/by-label/rec1
>>>
>>> /dev/disk/by-label/rec1:
>>> drive state is:  active/idle
>>> root at mypvr:~# hdparm -C /dev/disk/by-label/vid3
>>>
>>> /dev/disk/by-label/vid3:
>>> drive state is:  standby
>>>
>>> I have never met your long timeout to exit "Watch Recordings", but I
>>> am still using 16.04 with v29.
> The ubuntu dev folk are stupidly in quest of ummm strangestuff
> eg The whole wayland debacle. X11 may be old and bloated - fix it - don’t thow away elegant stuff
> eg I had auto-login with an app that required /dev/ttyUSBn. They are so clever that the ttyUSB’s have not yet been instantiated at auto-login time.
>
> So solution … maybe try debian, I’m going to.
>
> James
>
This is more of a systemd thing then ubuntu.  You could always make you 
auto-login session require that /dev/ttyUSBn be required... or create a 
udev rule which symlinks /dev/ttyUSBn to something more meaningful, and 
require that.

Not that I use Ubuntu myself, but this is common to pretty much any 
distro using systemd.