From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sun, 25 Feb 2001 10:24:16 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sun, 25 Feb 2001 10:23:57 -0500 Received: from B112d.pppool.de ([213.7.17.45]:3076 "EHLO susi.maya.org") by vger.kernel.org with ESMTP id ; Sun, 25 Feb 2001 10:23:45 -0500 Content-Type: text/plain; charset=US-ASCII From: Andreas Hartmann Organization: Privat Subject: Problem with DMA or agpgart on VIA686a-boards consists with kernel 2.4.2? Date: Sun, 25 Feb 2001 16:21:20 +0100 X-Mailer: KMail [version 1.2.1] MIME-Version: 1.0 Message-Id: <01022515592800.00283@athlon> Content-Transfer-Encoding: 7BIT To: linux-kernel@vger.kernel.org Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Used hardware: AMD Athlon 800 VIA KX133-Chipsatz with AGP Chipset: ATI 264LT Pro (3D Rage LT Pro) (Port Probed) Memory: 8192 Kbytes RAMDAC: ATI Mach64 integrated 15/16/24/32-bit DAC w/clock (with 6-bit wide lookup tables (or in 6-bit mode)) (programmable for 6/8-bit wide lookup tables) Attached graphics coprocessor: Chipset: ATI Mach64 Memory: 8192 Kbytes used software-versions: - Kernel 2.3.x until 2.4.2 - Kernel 2.4test - activated support for VIA82Cxxx and using DMA by default - X 3.3.6 - agpgart-module - glx from sourceforge.net with DMA and agpgart - reiserfs - DMA-mode of the hd (WDC WD205AA) is turned on with hdparm and runs in UDMA4-mode. Hallo all, I already found in some 2.3-versions or in the 2.4test-versions the following problem: The X-screen suddenly begins blinking and can't be stabilized without rebooting the machine (which did not freeze!). A restart of X-Server doesn't help. The problem persists. Unfortunately I couldn't find any error-log. A hint maybe the output of the glx.log when started in "damaged" situation (negative benchmarks): 119:dma buffer transfer speed: 13698:DmaBenchmark 0xfde00 bytes, 0.010 sec: 97 mb/s 15092:DmaBenchmark 0xfde00 bytes, -0.019 sec: -51 mb/s 13647:DmaBenchmark 0xfde00 bytes, 0.010 sec: 103 mb/s In not damaged situation, you can find something like this: 119:dma buffer transfer speed: 20007:DmaBenchmark 0xfde00 bytes, 0.016 sec: 61 mb/s 10397:DmaBenchmark 0xfde00 bytes, 0.006 sec: 163 mb/s 10296:DmaBenchmark 0xfde00 bytes, 0.006 sec: 164 mb/s Some information to glx: glx provides 3D-functions under X 3.3.6 with my graphic-chip and uses therefore DMA and agpgart. glx uses too a "little" file in the /tmp-directory, which resides on a reiserfs-partition. There are no problems with kernel 2.2.x and the special IDE-patches from Andre Hedrick. Now some interesting information perhaps: The patches from Alan Cox 2.4.1ac9 or ac17 (I didn't test the others) are working fine. I couldn't find any problem with these patches. I would be very appreciated if the related patches of Alan Cox could find there way in the official kernel! Kind regards, Andreas Hartmann