[Pkg-alsa-devel] Bug#438118: [alsa-devel] Bug#438118: alsa-utils: aplay non-blocking mode isn't working

[Anders Boström]

>>>>> "TI" == Takashi Iwai <tiwai at suse.de> writes:

Hi!

 >> Hi all,
 >> 
 >> can one please have a lokk at this? aplay -N isn't working for the
 >> OP.

 TI> Cannot reproduce here.  Could you _post_ more details?

OK, I've tested more, and discovered that the problem seems to be that
the end of the sound is cut in non-blocking mode. And if I play a very
short sound-file, I can't hear anything. Blocking mode works fine.

When using non-blocking mode, an strace contains "ioctl(4, 0x4144,
0x2b9f785d8000)        = -1 EAGAIN (Resource temporarily
unavailable)". Blocking mode never contains the EAGAIN response.

I attach two files. When playing halt.au, I can only hear the start,
about as much as "ha". When playing metal.au, I can't hear anything.

System info:

ASUS A8V Deluxe motherboard with Athlon 64 3500+ CPU
VIA 8237 with ALC850 sound
Linux 2.6.22.2 kernel for amd64
Debian testing amd64 with:
alsa-utils 1.0.14-1
libasound2 1.0.14a-2
libc6 2.6.1-1

I hope this helps. Please ask if you need more info.

/ Anders

 >> On Thu, 16 Aug 2007 the mental interface of
 >> Anders Boström told:
 >> 
 >> > >>>>> "ER" == Elimar Riesebieter <riesebie at lxtec.de> writes:
 >> > 
 >> >  >> strace aplay -N :
 >> >  >> 
 >> >  >> ...
 >> >  >> open("/usr/lib/alsa-lib/libasound_module_rate_speexrate.so", O_RDONLY) = -1 ENOENT (No such file or directory)
 >> > 
 >> >  ER> This file is provided by
 >> >  ER> libasound2-plugins: /usr/lib/alsa-lib/libasound_module_rate_speexrate.so
 >> > 
 >> >  ER> Please install libasound2-plugins and try again.
 >> > 
 >> > Thanks for the suggestion.
 >> > 
 >> > Unfortunately, it didn't solve my problem, no sound when non-blocking
 >> > mode is used. New strace:
 >> > 
 >> > strace aplay -N :
 >> > ...
 >> > open("/usr/lib/alsa-lib/libasound_module_rate_speexrate.so", O_RDONLY) = 5
 >> > read(5, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\20\22\0"..., 832) = 832
 >> > fstat(5, {st_mode=S_IFREG|0644, st_size=20848, ...}) = 0
 >> > mmap(NULL, 2116136, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 5, 0) = 0x2b9f792fe000
 >> > mprotect(0x2b9f79302000, 2097152, PROT_NONE) = 0
 >> > mmap(0x2b9f79502000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 5, 0x4000) = 0x2b9f79502000
 >> > close(5)                                = 0
 >> > ioctl(4, 0xc2604110, 0x7fff3269dec0)    = 0
 >> > ioctl(4, 0xc2604110, 0x7fff3269dec0)    = 0
 >> > ioctl(4, 0xc2604110, 0x7fff3269de00)    = 0
 >> > ioctl(4, 0xc2604110, 0x7fff3269de00)    = 0
 >> > ioctl(4, 0xc2604110, 0x7fff3269ddd0)    = 0
 >> > ioctl(4, 0xc2604110, 0x7fff3269ddc0)    = 0
 >> > ioctl(4, 0xc2604111, 0x7fff3269ddc0)    = 0
 >> > ioctl(4, 0xc0884113, 0x7fff3269dd10)    = 0
 >> > ioctl(4, 0x80184132, 0x7fff3269dc70)    = 0
 >> > mmap(NULL, 49152, PROT_READ|PROT_WRITE, MAP_SHARED, 4, 0) = 0x2b9f79503000
 >> > ioctl(4, 0xc0884113, 0x624e88)          = 0
 >> > ioctl(4, 0x4140, 0)                     = 0
 >> > ioctl(4, 0xc0884113, 0x624e88)          = 0
 >> > read(3, "\377eO\333\337\370\344}\335_\377\330^l\356\361`j\336_l"..., 1001) = 1001
 >> > read(3, "n{u^\342zl~e~_[\365_y\362_\363\350\337n[\347nmi`\367y\344"..., 604) = 604
 >> > ioctl(4, 0x4144, 0x2b9f785d8000)        = -1 EAGAIN (Resource temporarily unavailable)
 >> > close(3)                                = 0
 >> > ioctl(4, 0x4143, 0x3)                   = 0
 >> > munmap(0x2b9f79503000, 49152)           = 0
 >> > ioctl(4, 0x4112, 0)                     = 0
 >> > close(4)                                = 0
 >> > munmap(0x2b9f785d7000, 4096)            = 0
 >> > munmap(0x2b9f785d8000, 4096)            = 0
 >> > munmap(0x2b9f792fe000, 2116136)         = 0
 >> > exit_group(0)                           = ?
 >> 
 >> I have no idea, so forwarded to alsa-dev then.
 >> 
 >> THX in advance
 >> 
 >> Elimar
 >> 
 >> 
 >> -- 
 >> Experience is something you don't get until 
 >> just after you need it!
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