29-rc2 remaining breakage / ALSA

[Michael Trimarchi]

Hi,

Michael Trimarchi wrote:
> Hi,
>
> Andy Green wrote:
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>> Somebody in the thread at some point said:
>>
>> | But I think is related to the capture/playback device. The only big
>> | change seems the registration
>> | of the controls. The amixer dump gives us the answer I think.
>>
>> Hm it seems the difference may be that before, that ALSA stuff used to
>> truncate the control name to 30 chars?
>>
>> When I install FSO unstable on my SD card and then try alsactl restore
>> from the default /etc/asound.state that is installed, I see:
>>
>> root at om-gta02:~# alsactl restore
>> alsactl: set_control:989: warning: name mismatch (Playback Mixer Voice
>> Capture Sw/Playback Mixer Voice Capture Switch) for control #68
>> alsactl: set_control:991: warning: index mismatch (0/0) for control #68
>> alsactl: set_control:993: failed to obtain info for control #68 (No
>> buffer space available)
>>
>> And it's true when I look in that asound.state at #68 I see
>>
>> \0x09control.68 {
>> \0x09\0x09comment.access 'read write'
>> \0x09\0x09comment.type BOOLEAN
>> \0x09\0x09comment.count 1
>> \0x09\0x09iface MIXER
>> \0x09\0x09name 'Playback Mixer Voice Capture Sw'
>> \0x09\0x09value false
>> \0x09}
>>
>> However if I do an alsactl store, and look at #68 from the new
>> asound.state, I see
>>
>> \0x09control.68 {
>> \0x09\0x09comment.access 'read write'
>> \0x09\0x09comment.type BOOLEAN
>> \0x09\0x09comment.count 1
>> \0x09\0x09iface MIXER
>> \0x09\0x09name 'Playback Mixer Voice Capture Switch'
>> \0x09\0x09value false
>> \0x09}
>>
>> Just as it says, the name has evidently "changed" or at least is not
>> truncated any more.
>>
>> If this is the issue then it just randomly affects ALSA controls with
>> "long names".
>>
>> I dread to think about the hassle of making a new "dimension" of alsa
>> states based not only on device and hardware revision, but by kernel
>> revision.
>>
>> So I will take a look at seeing if we can either change the names to be
>> truncated by definition or truncate them for compatability.
>>
>> - -Andy
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>> iEYEARECAAYFAkmF0xcACgkQOjLpvpq7dMq5SgCfScGSeUiG1MAEFd29j7KwkLLl
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> Try this.
>
> Michael
Tested on android and seems to work. We need other testing in other system.

Michael