[mythtv] Developing RPI2 MythTV package for ArchLinux ARM

[Lawrence Rust]

On Thu, 2015-12-31 at 00:20 +0100, warpme wrote:
> Lawrence,
> 
> I started to play with RPI2 and current MythTV master.
> My idea is launch MiniMyth2 for ARM platform, and ARM ArchLinux is learning phase about MythTV and ARM world. 
> So, now I’m developing working fronted on ARM Archlinux.
> I already managed to prepare build system, built mythtv package and install it.
> Issue I’m stuck is fronted "semi-hang" during FE startup. FE contineously produces 
> …..
> 2015-12-30 22:49:19.103978 I  (0x6900d490)::DecrRef() -> 1
> 2015-12-30 22:49:19.104034 I  (0x69006580)::IncrRef() -> 2
> 2015-12-30 22:49:19.104092 I  (0x69006580)::DecrRef() -> 1
> 2015-12-30 22:49:19.104164 I  (0x69004e38)::IncrRef() -> 2
> 2015-12-30 22:49:19.104233 I  (0x69004e38)::DecrRef() -> 1
> …..
> in console.
> 
> FE shows no any GUI.
[snip]
> here is trace:

Looking at the backtrace shows it to be stuck in setuid().  I had
similar problems with starting the FE when using Qt5.4 and added this
patch:

1000b15 FE/avtest: setuid fails in Qt>=5.3 and causes program exit

Maybe Qt 5.5.1 has similar problems.  I would remove the call to setuid
from mythfrontend/main.cpp and see what happens.

-- Lawrence Rust