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    SubjectRe: DMA broken in mainline 2.6.13.2 _AND_ opensuse vendor 2.6.13-15
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    On Wed, Sep 21, 2005 at 10:28:18PM -0400, David R wrote:
    > DMA is broken in 2.6.13.2 and opensuse 2.6.13-15, for my cdrom/dvd
    > burner.
    >
    > My chipset is:
    >
    > 00:0f.1 IDE interface: VIA Technologies, Inc.
    > VT82C586A/B/VT82C686/A/B/VT823x/A/C/VT8235 PIPC Bus Master IDE (rev 06)
    >
    > I have also heard ICH5 has this problem as well.
    >
    > I can tell you that hdparm -iI /dev/hdb reports the drive in udma4 mode.
    >
    > This drive is a: LITE-ON DVDRW SOHW-1693S, FwRev=KS09 However I think
    > that maybe irrelevant.
    >
    > On .13 I get this at the end of dmesg:
    >
    > hdb: drive_cmd: status=0x51 { DriveReady SeekComplete Error }
    > hdb: drive_cmd: error=0x04 { AbortedCommand }
    > ide: failed opcode was: 0xec
    > hdb: drive_cmd: status=0x51 { DriveReady SeekComplete Error }
    > hdb: drive_cmd: error=0x04 { AbortedCommand }
    > ide: failed opcode was: 0xec
    >
    > On .12 I get this but not on .13:
    >
    > VP_IDE: VIA vt8237 (rev 00) IDE UDMA133 controller on pci0000:00:0f.1
    > ide0: BM-DMA at 0xa000-0xa007, BIOS settings: hda:pio, hdb:DMA
    > ide1: BM-DMA at 0xa008-0xa00f, BIOS settings: hdc:pio, hdd:pio

    What is on hda?

    If nothing, fix your system. You should NOT have a slave without a
    master on an ide bus.

    Probably won't fix things, but sometimes it does fix things.

    Len Sorensen
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