[alsa-devel] Order of device overrides in config files

[Pavel Hofman]

Dne 11.6.2018 v 15:34 Jaroslav Kysela napsal(a):
> Dne 11.6.2018 v 15:18 Pavel Hofman napsal(a):
>> Dne 11.6.2018 v 14:20 Jaroslav Kysela napsal(a):
> 
> It seems that there's something different in your system, so the
> ~/.asoundrc file is not parsed as last.

Ubuntu 16:04 (Mint 17)

It is parsed by the same order as specified in

@hooks [
         {
                 func load
                 files [
                         {
                                 @func concat
                                 strings [
                                         { @func datadir }
                                         "/alsa.conf.d/"
                                 ]
                         }
                         "/etc/asound.conf"
                         "~/.asoundrc"
                 ]
                 errors false
         }
]


But the last "default" redefinition occurs from 
usr/share/alsa/pulse-alsa.conf, which is "scheduled" by 
alsa.conf.d/pulse.conf:


hook_func.pulse_load_if_running {
         lib "libasound_module_conf_pulse.so"
         func "conf_pulse_hook_load_if_running"
}

@hooks [
         {
                 func pulse_load_if_running
                 files [
                         "/usr/share/alsa/pulse-alsa.conf"
                 ]
                 errors false
         }
]

According to strace, the function pulse_load_if_running opens 
/usr/share/alsa/pulse-alsa.conf AFTER ~/.asoundrc:

strace aplay -v -D default /home/hestia/Hudba/192.wav 2>&1 | nl | grep 
-E '/usr/share/alsa|asoundrc'
     88	stat("/usr/share/alsa/alsa.conf", {st_mode=S_IFREG|0644, 
st_size=9182, ...}) = 0
     89	open("/usr/share/alsa/alsa.conf", O_RDONLY) = 3
    100	access("/usr/share/alsa/alsa.conf.d/", R_OK) = 0
    101	stat("/usr/share/alsa/alsa.conf.d/", {st_mode=S_IFDIR|0755, 
st_size=123, ...}) = 0
    102	openat(AT_FDCWD, "/usr/share/alsa/alsa.conf.d/", 
O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3
    106	open("/usr/share/alsa/alsa.conf.d//50-pulseaudio.conf", 
O_RDONLY) = 3
    114	open("/usr/share/alsa/alsa.conf.d//bluetooth.conf", O_RDONLY) = 3
    122	open("/usr/share/alsa/alsa.conf.d//pulse.conf", O_RDONLY) = 3
    131	access("/home/hestia/.asoundrc", R_OK)  = 0
    132	stat("/home/hestia/.asoundrc", {st_mode=S_IFREG|0644, 
st_size=215, ...}) = 0
    133	open("/home/hestia/.asoundrc", O_RDONLY) = 3
    540	access("/usr/share/alsa/pulse-alsa.conf", R_OK) = 0
    541	stat("/usr/share/alsa/pulse-alsa.conf", {st_mode=S_IFREG|0644, 
st_size=340, ...}) = 0
    542	open("/usr/share/alsa/pulse-alsa.conf", O_RDONLY) = 6


Best regards,

Pavel.