Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 10 Oct 2001 14:00:07 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 10 Oct 2001 13:59:57 -0400 Received: from mailgw.prontomail.com ([216.163.180.10]:608 "EHLO c0mailgw12.prontomail.com") by vger.kernel.org with ESMTP id ; Wed, 10 Oct 2001 13:59:53 -0400 Message-ID: <3BC48C0E.760488AA@starband.net> Date: Wed, 10 Oct 2001 13:57:34 -0400 From: war X-Mailer: Mozilla 4.78 [en] (X11; U; Linux 2.4.7 i686) X-Accept-Language: en MIME-Version: 1.0 To: linux-kernel@vger.kernel.org Subject: ATA/100 Promise Board Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Any idea why DMA is sometimes on and sometimes not for a few cdrom drives I have hooked up to my promise controller? Whether it is on or off, whenever I copy a CD from a (dma) cdrom whether it dma is on or off it slows my system down big time. Move the cursor around in X, and it lags, watch X-Chat, the characters you type in slowly appear 3-5 seconds after. Hook the same drives up to the motherboard ide interfaces and there is no lag at all. This has always been the case with my cdroms. When I had my HD on the Promise, it did DMA etc just fine. Is there a problem with the driver if a HD is not on there it doesn't do DMA correctly or something? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/