Messages in this thread | | | From | Dominique Dumont <> | Subject | Re: [Alsa-user] PCM distorsion snapshots from SATA/ALSA conflict | Date | Sat, 14 Oct 2006 17:04:03 +0200 |
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Lee Revell <rlrevell@joe-job.com> writes:
> (it's probably a bad idea to attach .jpgs to a LKML post - please post > them on the web and send a URL)
(ok. But is there a site that will guarantee the availability of the jpg attachments when people are searching the lklm or alsa archives ? )
> You seem to be using a period size of 256 samples - any change if you > use a larger period size?
Unless I'm wrong, you want me to test the PCM output while modifying the --period option of speaker-test.
So I've tested this command: speaker-test -D iec958 -c 2 -f 1000 -p 4096 -t sine -s 2
No change: I still have a lot of spikes in the sine wave.
> Any change if you use setpci to increase LATENCY_TIMER for the SBLive! > card?
To be sure I've done the correct tests, here are the commands are used:
$ lspci [...] 01:07.0 Multimedia audio controller: Creative Labs SB Live! EMU10k1 (rev 0a) 01:07.1 Input device controller: Creative Labs SB Live! Game Port (rev 0a) [...] 01:0b.0 RAID bus controller: Silicon Image, Inc. SiI 3112 [SATALink/SATARaid] Serial ATA Controller (rev 02)
$ sudo setpci -s 01:07.0 latency_timer=80 $ sudo setpci -s 01:07.0 latency_timer=f8 $ sudo setpci -s 01:0b.0 latency_timer=10
No change at all :-(
Cheers
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