Hi, On Thu, 26 Aug 2010 15:02:04 +0200 Clemens Ladisch <clemens@xxxxxxxxxx> wrote: > David Santamauro wrote: > > Since upgrading my audio PC to 64-bit, > > Hardware or software upgrade? Both ... I should say the 32-bit linux test was done on different hardware. The events were: a) pc1, fedora 11 32-bit both maudio delta 1010 and 2496 coexist happily b) pc2 new build to be a 64-bit machine c) pulled delta 1010 out of pc1, inserted into pc2 -- noise d) installed win7 64-bit in dual boot configuration on pc2, no noise with delta 1010 > > > the delta 1010 analog inputs emit a constant 'hiss' -36 -30dB. > > Analog outputs and digital ins and outs are fine. The delta 1010 > > from a hardware perspective is fine as I tested it on the same pc > > hardware under windows7 64-bit. > > In theory, this sounds like a driver bug. > > > So far, I have tested it in a 32-bit fedora, 32-bit windows vista > > and 64-bit windows7 all successfully. This problem arises only in > > 64-bit fedora. > > Does the 32-bit Linux use the same driver version? To be honest, I'm not sure exactly how to check. They are the latest versions of fedora 11 (32-bit) and fedora 12 (64-bit). srcversion from a modinfo yields different results. 32-bit fedora 11 Linux beethoven 2.6.29.6-1.rt23.4.fc11.ccrma.i586.rt srcversion: F7E1C076BE18C5DFF723A6E 64-bit fedora 12 Linux debussy 2.6.31.12-1.rt21.1.fc12.ccrma.x86_64.rt srcversion: 0B183929429B4C5102B7D09 > If yes, then it's possible that the 32-bit and 64-bit kernels > configure the PC differently; for example, there might be noise on > the power line due to a different kind of power management. another interesting angle... I thought it might be power or some kind of internal noise. How could I pursue that further? David _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
