A NOTE has been added to this issue. ====================================================================== <https://bugtrack.alsa-project.org/alsa-bug/view.php?id=1869> ====================================================================== Reported By: bitmage2 Assigned To: ====================================================================== Project: ALSA - driver Issue ID: 1869 Category: CORE - pcm Reproducibility: always Severity: minor Priority: normal Status: new Distribution: SuSE Linux 10.0 Kernel Version: Linux 2.6.13-15.8-default #1 Tue Feb 7 11:07:24 UTC 2006 i686 athlon i386 GNU/Linux ====================================================================== Date Submitted: 02-23-2006 00:48 CET Last Modified: 07-25-2006 03:00 CEST ====================================================================== Summary: Playing surround sound produces 100% CPU load Description: I am using the CS46xx with a Hercules Gametheater XP 5.1 . It plays back stereo without problems. I wanted to use the rest of my 5.1 speaker set, so for a test I ran the speaker-test program. Running it without parameters or with 2 or 4.0 channels works also fine. So far so good. But when I run it with 5.0 channels or 5.1 channels the CPU load of speaker-test goes to 100%. I'll show the output of top along with the command lines below (for the 2.0 and 5.1 case) in the "Additional Information" box. ====================================================================== ---------------------------------------------------------------------- bitmage2 - 07-24-06 20:38 ---------------------------------------------------------------------- I just validated, that the problem is still there in 1.0.12rc1 . I did install that version on a clean linux installation. I also did a "strace speaker-test ...". While everything works fine, it looks like this: ... poll([{fd=4, events=POLLOUT|POLLERR|POLLNVAL, revents=POLLOUT}], 1, -1) = 1 ioctl(4, 0x4122, 0xbfeb2ab8) = 0 ioctl(4, 0x4122, 0xbfeb2ab8) = 0 poll([{fd=4, events=POLLOUT|POLLERR|POLLNVAL, revents=POLLOUT}], 1, -1) = 1 ioctl(4, 0x4122, 0xbfeb2ab8) = 0 ioctl(4, 0x4122, 0xbfeb2ab8) = 0 poll([{fd=4, events=POLLOUT|POLLERR|POLLNVAL, revents=POLLOUT}], 1, -1) = 1 ioctl(4, 0x4122, 0xbfeb2ab8) = 0 ioctl(4, 0x4122, 0xbfeb2ab8) = 0 poll([{fd=4, events=POLLOUT|POLLERR|POLLNVAL, revents=POLLOUT}], 1, -1) = 1 ioctl(4, 0x4122, 0xbfeb2ab8) = 0 ioctl(4, 0x4122, 0xbfeb2ab8) = 0 ... When the problem shows up, the strace output is this (not calling poll() anymore): ioctl(4, 0x4122, 0xbfeb2ab8) = 0 ioctl(4, 0x4122, 0xbfeb2ab8) = 0 ioctl(4, 0x4122, 0xbfeb2ab8) = 0 ioctl(4, 0x4122, 0xbfeb2ab8) = 0 ioctl(4, 0x4122, 0xbfeb2ab8) = 0 ioctl(4, 0x4122, 0xbfeb2ab8) = 0 ioctl(4, 0x4122, 0xbfeb2ab8) = 0 ioctl(4, 0x4122, 0xbfeb2ab8) = 0 ioctl(4, 0x4122, 0xbfeb2ab8) = 0 ioctl(4, 0x4122, 0xbfeb2ab8) = 0 ioctl(4, 0x4122, 0xbfeb2ab8) = 0 ioctl(4, 0x4122, 0xbfeb2ab8) = 0 ... ---------------------------------------------------------------------- Raymond - 07-25-06 03:00 ---------------------------------------------------------------------- It is possible that you have many sound servers(e.g. esd, arts, ... ) running without notice since cs46xx support hardware mixing ( multiple subdevices ) 00-00: CS46xx : CS46xx : playback 31 : capture 1 00-01: CS46xx - Rear : CS46xx - Rear : playback 31 00-02: CS46xx - IEC958 : CS46xx - IEC958 : playback 1 00-03: CS46xx - Center LFE : CS46xx - Center LFE : playback 31 The problem will be the lock in rear device if you have any sound server(OSS emulation) which use more than 2 channels Issue History Date Modified Username Field Change ====================================================================== 02-23-06 00:48 bitmage2 New Issue 02-23-06 00:48 bitmage2 Distribution => SuSE Linux 10.0 02-23-06 00:48 bitmage2 Kernel Version => Linux 2.6.13-15.8-default #1 Tue Feb 7 11:07:24 UTC 2006 i686 athlon i386 GNU/Linux 02-23-06 00:54 bitmage2 Note Added: 0008164 02-23-06 00:55 bitmage2 Issue Monitored: bitmage2 07-11-06 05:58 Raymond Note Added: 0010964 07-14-06 20:57 bitmage2 Note Added: 0011004 07-14-06 20:59 bitmage2 Note Added: 0011005 07-14-06 21:25 rlrevell Note Added: 0011006 07-14-06 22:40 bitmage2 Note Added: 0011008 07-14-06 22:57 rlrevell Note Added: 0011009 07-15-06 01:28 bitmage2 Note Added: 0011013 07-15-06 01:45 rlrevell Note Added: 0011014 07-15-06 05:09 Raymond Note Added: 0011017 07-15-06 07:17 Raymond Note Edited: 0011017 07-23-06 11:34 bitmage2 Note Added: 0011183 07-23-06 13:49 Raymond Note Added: 0011185 07-23-06 14:14 Raymond Note Added: 0011186 07-23-06 14:16 Raymond Note Deleted: 0011186 07-23-06 15:04 bitmage2 Note Added: 0011189 07-24-06 04:19 Raymond Note Added: 0011209 07-24-06 05:04 Raymond Note Edited: 0011209 07-24-06 20:38 bitmage2 Note Added: 0011214 07-25-06 03:00 Raymond Note Added: 0011223 ====================================================================== ------------------------------------------------------------------------- Take Surveys. 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