Date: Tue, 13 Apr 1999 11:24:44 -0500 From: Kris Kirby <kris@airnet.net> To: freebsd-doc@FreeBSD.ORG Subject: A Question for the FAQ... Message-ID: <37136FCC.5DA38381@airnet.net>
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I had a chance to upgrade and immediately noticed that under certain circumstances, the UDMA option of the wd(4) driver can interfere with audio playback. Symptoms include: Audio chopping, slowing down, stopping. All occur under heavy to "normal" (normal for playing back a 44100 Hz, 16 bit, stereo .WAV file) disk access. Turning off the DMA (flags 0x2000) results in a return to normalcy, without any loss in performance. (I bonnie'd the hard drive like crazy to make sure :-). Machine: AMD K6-2, 300 MHz. Spacewalker HOT-591P "Super 7" MB, 512K L2. RAM: 64MB of PC100, running at 66 MHz (Processor is 66 MHz version) Hard drive: 6.8G Maxtor DiamondMax (Maxtor 90680D4) Audio Card: Yamaha YMH0020, using Luigi's driver. Any other questions necessary, email me. I have fixed the problem at the point in time. It just seemed like a really good one for the FAQ to cover. -- Kris Kirby Home <kris@airnet.net> UAH CS <kkirby@cs.uah.edu> WWW <nomurphy@hotmail.com> ------------------------------------------- TGIFreeBSD... 'Nuff said. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-doc" in the body of the message
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