A NOTE has been added to this issue. ====================================================================== <https://bugtrack.alsa-project.org/alsa-bug/view.php?id=1724> ====================================================================== Reported By: Raymond Assigned To: mjander ====================================================================== Project: ALSA - driver Issue ID: 1724 Category: PCI - au88x0 Reproducibility: always Severity: block Priority: normal Status: assigned Distribution: Kernel Version: ====================================================================== Date Submitted: 01-07-2006 05:10 CET Last Modified: 06-30-2006 13:53 CEST ====================================================================== Summary: au88x0 PCM configuration problem - buffer_size constraint Description: /cvs/alsa-lib/test/pcm_min ALSA lib pcm.c:7127:(snd_pcm_set_params) Unable to set buffer time (latency) 500000 for PLAYBACK: Invalid argument Playback open error: Invalid argument sound card is au8830, the au88x0 driver only accept period size in power of 2. ====================================================================== Relationships ID Summary ---------------------------------------------------------------------- related to 0001766 jackd : ALSA: cannot set period size to... ====================================================================== ---------------------------------------------------------------------- rlrevell - 05-30-06 18:31 ---------------------------------------------------------------------- What does this IRQ issue have to do with the buffer size constraint? Raymond, PLEASE stop using this bug tracker as your private IRC channel. One bug report per bug. ---------------------------------------------------------------------- Raymond - 06-30-06 13:53 ---------------------------------------------------------------------- The following is output of "test.c" which I upload, any idea how to refine the constraints (period_size and buffer_size) according to the latency ./test pcm state after pcm open : 0 period size (min=1 max=4096) 1 2 4 8 16 32 64 128 256 512 1024 2048 4096 buffer size (min=2 max=65536) 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 68 72 76 80 84 88 92 96 100 104 108 112 116 120 124 128 136 144 152 160 168 176 184 192 200 208 216 224 232 240 248 256 272 288 304 320 336 352 368 384 400 416 432 448 464 480 496 512 544 576 608 640 672 704 736 768 800 832 864 896 928 960 992 1024 1088 1152 1216 1280 1344 1408 1472 1536 1600 1664 1728 1792 1856 1920 1984 2048 2176 2304 2432 2560 2688 2816 2944 3072 3200 3328 3456 3584 3712 3840 3968 4096 4352 4608 4864 5120 5376 5632 5888 6144 6400 6656 6912 7168 7424 7680 7936 8192 8704 9216 9728 10240 10752 11264 11776 12288 12800 13312 13824 14336 14848 15360 15872 16384 17408 18432 19456 20480 21504 22528 23552 24576 25600 26624 27648 28672 29696 30720 31744 32768 34816 36864 38912 40960 43008 45056 47104 49152 51200 53248 55296 57344 59392 61440 63488 65536 pcm state before hw_params : 0 pcm state after hw_params : 2 period size = 1 buffer size = 32 Issue History Date Modified Username Field Change ====================================================================== 01-07-06 05:10 Raymond New Issue 01-09-06 15:19 Raymond Note Added: 0007537 01-19-06 15:04 Raymond Note Deleted: 0007537 01-19-06 15:36 Raymond Note Added: 0007721 01-28-06 07:58 Raymond Note Added: 0007828 01-28-06 07:58 Raymond Note Deleted: 0007721 01-30-06 18:46 Raymond Note Added: 0007840 01-31-06 03:15 Raymond Note Added: 0007844 01-31-06 06:41 Raymond Note Edited: 0007840 01-31-06 07:03 Raymond Note Edited: 0007840 01-31-06 07:08 Raymond Note Edited: 0007840 01-31-06 07:11 Raymond Note Edited: 0007840 01-31-06 08:31 Raymond Note Edited: 0007840 01-31-06 09:48 Raymond Note Edited: 0007844 01-31-06 10:19 perex Note Added: 0007845 01-31-06 10:26 perex Note Added: 0007847 01-31-06 10:26 perex Note Edited: 0007847 01-31-06 10:48 perex Project ALSA - lib => ALSA - driver 01-31-06 10:49 perex Category 0_general => PCI - au88x0 01-31-06 10:49 perex Summary simple PCM helper function => au88x0 PCM configuration problem - buffer_size constraint 01-31-06 11:06 Raymond Note Added: 0007848 01-31-06 13:48 perex Status new => assigned 01-31-06 13:48 perex Assigned To => mjander 01-31-06 13:49 perex Relationship added related to 0001766 01-31-06 15:59 Raymond Note Added: 0007852 02-01-06 07:35 perex Note Added: 0007857 02-01-06 10:32 Raymond Note Added: 0007858 02-01-06 10:37 Raymond Note Edited: 0007848 02-01-06 17:15 Raymond Note Edited: 0007844 02-01-06 17:20 Raymond Note Added: 0007860 02-02-06 10:23 Raymond Note Added: 0007874 02-02-06 11:10 Raymond Note Edited: 0007874 02-02-06 15:48 Raymond Note Edited: 0007874 02-03-06 14:26 Raymond Note Added: 0007897 02-04-06 02:46 Raymond Note Edited: 0007874 02-04-06 02:52 Raymond Note Edited: 0007858 02-04-06 02:56 Raymond Note Edited: 0007858 02-05-06 16:39 Raymond Note Added: 0007939 02-05-06 16:48 Raymond Note Added: 0007940 02-06-06 04:40 Raymond Note Deleted: 0007939 02-06-06 06:15 Raymond Note Edited: 0007940 02-07-06 07:35 Raymond Note Added: 0007954 02-13-06 03:11 Raymond Note Added: 0008036 02-13-06 08:52 mjander Note Added: 0008039 02-13-06 16:57 Raymond Note Added: 0008055 02-13-06 17:02 Raymond Note Edited: 0008055 02-13-06 17:02 Raymond Note Edited: 0008055 02-16-06 04:01 Raymond Note Added: 0008083 02-19-06 06:31 Raymond Note Added: 0008130 02-19-06 06:39 Raymond Note Edited: 0008130 03-07-06 11:08 Raymond Note Added: 0008362 03-07-06 14:18 Raymond Note Edited: 0007844 03-24-06 10:51 Raymond File Added: snd_pcm_set_params.patch 03-30-06 18:35 Raymond Note Added: 0009036 05-22-06 15:11 Raymond Note Deleted: 0008055 05-22-06 15:12 Raymond Note Deleted: 0008362 05-22-06 15:13 Raymond Note Deleted: 0008130 05-22-06 15:14 Raymond Note Deleted: 0008083 05-22-06 15:15 Raymond Note Deleted: 0009036 05-22-06 15:16 Raymond Note Deleted: 0007860 05-22-06 15:17 Raymond Note Deleted: 0007848 05-22-06 15:20 Raymond Note Deleted: 0007940 05-22-06 15:24 Raymond Note Deleted: 0007954 05-22-06 15:48 Raymond Note Added: 0009912 05-30-06 09:36 Raymond Note Added: 0010017 05-30-06 09:38 Raymond Note Edited: 0010017 05-30-06 18:31 rlrevell Note Added: 0010020 06-30-06 13:49 Raymond File Added: test.c 06-30-06 13:53 Raymond Note Added: 0010734 ====================================================================== Using Tomcat but need to do more? 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