Date: Sun, 22 Dec 2002 10:54:58 -0800 From: Andy Sparrow <spadger@best.com> To: Matthew Dillon <dillon@apollo.backplane.com> Cc: Thomas Nystrom <thn@saeab.se>, Mike Tancsa <mike@sentex.net>, stable@FreeBSD.ORG Subject: Re: Fix for hanging of vr interface (Rhine Ethernet) Message-ID: <20021222185458.74EBD33A@CRWdog.demon.co.uk> In-Reply-To: Message from Matthew Dillon <dillon@apollo.backplane.com> of "Fri, 20 Dec 2002 22:35:57 PST." <200212210635.gBL6Zvc5035909@apollo.backplane.com>
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> I have noticed that video takes appreciable ram bandwidth on > this EPIA5000. In 1024x768 @ 70KHz / 24bpp (32bpp frame buffer), > a busy cpu can glitch the screen. > > I think the EPIA BIOS may not be setting up PCI latency timers > properly in my case. I'll bet workstations with faster memory > busses do better. There may not be anything that can be done > in the VR driver. Hmm. I wonder. Have you tried this, and does it help?: http://www.mini-itx.com/faq.asp#Linux1 3.2. What should I do if I have poor quality sound (pops, clicks and squeaks) - particularly when dragging or scrolling windows? This is caused by X writing blindly to the video card's instruction queue without checking to see if the queue is full. This will lock the PCI bus for about 40 - 50 audio cycles, causing pops, clicks and squeaks. The via82cxxx_audio driver is still somewhat fragile, so it is possible that some applications will fault ungracefully if the bus is disrupted badly enough (e.g. with SDL applications). You can make X play nice with the PCI bus by adding Option "PciRetry" "true" to the "Device" stanza. Nasty pops and glitches will go away, and system stability will be much improved. Cheers, AS To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the messagehelp
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