Date: Sat, 29 Nov 2008 13:21:41 +0100 From: Polytropon <freebsd@edvax.de> To: "Roey Dror" <darwinian.empire@gmail.com> Cc: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: Noisy mouse Message-ID: <20081129132141.6f450eea.freebsd@edvax.de> In-Reply-To: <c9f50ec40811290343j2eb99094v33bfb086abba0355@mail.gmail.com> References: <c9f50ec40811290343j2eb99094v33bfb086abba0355@mail.gmail.com>
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On Sat, 29 Nov 2008 13:43:45 +0200, "Roey Dror" <darwinian.empire@gmail.com> wrote: > I'm using FreeBSD 7.0 (i386) with the IceWM window manager. The sound > seems to work when playing files with xmms. > When my speakers are turned on, I hear noise whenever I move my mouse > or make a keystroke. Is this a bug, or a strange feature? How do i > turn it off? I have a similar observation here, allthough you can hear the "noisy mouse" only when the mixer settings vol is 100. In my opinion, this seems to be a kind of electromagnetic interference, but I didn't test this theory yet. Or it has to do with data fransfers during mouse movement / keystrokes? USB uses polling, but maybe some weird interrupt problem? Anyone remembers Sound Blaster problems when printing on a parallel printer (IRQ7)? My settings are different from yours: % uname -r 7.0-STABLE (ca. Aug 2008) % cat /dev/sndstat FreeBSD Audio Driver (newpcm: 32bit 2007061600/i386) Installed devices: pcm0: <CMedia CMI8738> at io 0xd800 irq 16 [MPSAFE] (1p:1v/1r:1v channels duplex default) % dmesg | grep pcm pcm0: <CMedia CMI8738> port 0xd800-0xd8ff irq 16 at device 7.0 on pci3 pcm0: [ITHREAD] % sysctl -a | grep snd hw.snd.latency_profile: 1 hw.snd.latency: 5 hw.snd.report_soft_formats: 1 hw.snd.compat_linux_mmap: 0 hw.snd.feeder_buffersize: 16384 hw.snd.feeder_rate_round: 25 hw.snd.feeder_rate_max: 2016000 hw.snd.feeder_rate_min: 1 hw.snd.verbose: 1 hw.snd.maxautovchans: 16 hw.snd.default_unit: 0 hw.snd.version: 2007061600/i386 hw.snd.default_auto: 0 As you described, moving the mouse and pressing keys on the keyboard result in strange "sound effects". I have a Sun USB type 6 keyboard + type 6 mouse. I'm using a separate sound card (PCI) because I diskike the "AC'97" CPU sound card emulation. :-) -- Polytropon >From Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ...
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