Hi list, a few weeks ago I posted a mail into this list regarding a problem with heavy distorted midisound.
After a lot of digging around with alsa 0.5 and 0.9 I was able to locate the error. It was (or is) related with ACPI. My system is Athlon based with a VIA KT266A chipset. As far as Athlons consume a lot of power I searched and found a way to use ACPI for powermanagement, which significantly reduces CPU temperature and therefore powerconsumption. This is done by statically linking ACPI into the kernel and then manipulating the 'Disconnect Enable when STPGNT Detected' in the northbridge of the chipset as described in http://cip.uni-trier.de/nofftz/linux/Athlon-Powersaving-HOWTO.html But this also is the cause of this unwanted sideeffect regarding my problem with distorted midi. Playing of midifiles does not generate noticable amount of CPU load (in top or xosview), and so it seems that the CPU often fells into the STPGNT state, where it is disconnected from the bus and needs a few tenth or hundred milliseconds to wake up again, which seems to be the cause of this heavy distortions. With deactivated 'Disconnect Enable' bit playing of midifiles runs fine, even with (the deprecated) alsa 0.5.12a Just for the records ;-). Keep up the good work -- +++ GMX - Mail, Messaging & more http://www.gmx.net +++ NEU: Mit GMX ins Internet. Rund um die Uhr für 1 ct/ Min. surfen! ------------------------------------------------------- This SF.net email is sponsored by: Get the new Palm Tungsten T handheld. Power & Color in a compact size! http://ads.sourceforge.net/cgi-bin/redirect.pl?palm0002en _______________________________________________ Alsa-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-user
