Date: Tue, 10 Jun 2003 18:50:46 -0400 From: Jud <judmarc@fastmail.fm> To: Thomas Schuerger <schuerge@wjpserver.cs.uni-sb.de>, freebsd-questions@freebsd.org Subject: Re: Sound card noises on graphics card access Message-ID: <oprqkpqwu40cf2rk@fastmail.fm> In-Reply-To: <20030610101729.A809@wjpserver.cs.uni-sb.de> References: <20030610101729.A809@wjpserver.cs.uni-sb.de>
next in thread | previous in thread | raw e-mail | index | archive | help
On Tue, 10 Jun 2003 10:17:29 +0200, Thomas Schuerger = <schuerge@wjpserver.cs.uni-sb.de> wrote: > Hi, > > I have the following problem with FreeBSD 4.7-STABLE (running XFree86 > 4.2.0). > > Recently, my AGP graphics card (Matrox G200) stopped working (a hardwa= re > defect), so I used a rather old PCI Mach64 card instead. I also have > a Soundblaster AWE 64 (ISA, using pcm) in my box. > > Now, whenever the PCI bus is accessed while the soundcard plays someth= ing = > (e.g. > by moving windows around or playing a movie), I can actually *hear* th= e = > bus > accesses in my loudspeakers (very short and frequent pauses and clicki= ng > noises - several per second, which sounds rather strange). > > It was the same (but the noises where extremely rare) when my MGA 200 = was = > still > working, but with the PCI card, it is really horrible. > > When using Win98, my system behaves normally (no strange noises can be= > heard on graphics access). > > I figure this being a driver problem. What can I do about that? Are > there any parameters I may have forgotten to set? Had the same type of problem when I initially tried BeOS and FreeBSD aft= er = living in the Win world. Whenever I moved the mouse cursor the sound ca= rd = emitted a noise like a motorboat - even increased in frequency as the = cursor accelerated! I think it's likely the sound card is picking up changes in electrical = field from the old video card. Separate the two within the case as much= as = possible and see if that helps - when I did it here, it put the "motorbo= at" = in permanent drydock. :) Jud =
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?oprqkpqwu40cf2rk>