My problem is similar to Scot's (Plextor) and may be related. I have installed FC3 (+ all outstanding updates) on a Dell Latitude D810 laptop. The everything works, but I am unable to get my CD/DVD drive to use DMA. My experience with "hdparm" is the same as Scott's as described previously. Interestingly, I have a Dell Inspiron 8100, which is nearly four years old running a fully patched FC2 OS with no DMA issues. It is running kernel 2.6.10-1.770_FC2 which makes me think the problem is related to the 82801FBM (AKA ICH6R) in the D810. Thanks for listening, Ray PS Details follow. Kernel config includes: CONFIG_BLK_DEV_IDEDMA_PCI=y CONFIG_IDEDMA_PCI_AUTO=y The System components are: CPU: Intel Pentium-M (M760) 2.0GHz stepping 08 RAM: 1GB Disk: (sda) Hitachi PATA/IDE 60GB, 8MB cache, 7200RPM CD/DVD: (hdc) ATAPI CD-ROM, SONY DVD+/-RW DW-D56A CHIP: IDE ifc Intel Corp. 82801FBM (ICH6M) SATA Controller Kernel: 2.6.10-1.766_FC3 #1 Wed Feb 9 23:06:42 EST 2005 i686 i686 i386 GNU/Linux IDE/ATA related snippets from dmesg: ACPI: Using PIC for interrupt routing ACPI: PCI Root Bridge [PCI0] (00:00) PCI: Probing PCI hardware (bus 00) PCI: Ignoring BAR0-3 of IDE controller 0000:00:1f.2 PCI: Transparent bridge - 0000:00:1e.0 Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2 ide: Assuming 66MHz system bus speed for PIO modes ide0: I/O resource 0x1F0-0x1F7 not free. ide0: ports already in use, skipping probe Probing IDE interface ide1... hdc: SONY DVD+/-RW DW-D56A, ATAPI CD/DVD-ROM drive Probing IDE interface ide2... ide2: Wait for ready failed before probe ! Probing IDE interface ide3... ide3: Wait for ready failed before probe ! Probing IDE interface ide4... ide4: Wait for ready failed before probe ! Probing IDE interface ide5... ide5: Wait for ready failed before probe ! elevator: using anticipatory as default io scheduler ide1 at 0x170-0x177,0x376 on irq 15 hdc: ATAPI 24X DVD-ROM DVD-R CD-R/RW drive, 2048kB Cache Uniform CD-ROM driver Revision: 3.20 SCSI subsystem initialized libata version 1.10 loaded. ata_piix version 1.03 ACPI: PCI Interrupt Link [LNKB] enabled at IRQ 7 PCI: setting IRQ 7 as level-triggered ACPI: PCI interrupt 0000:00:1f.2[B] -> GSI 7 (level, low) -> IRQ 7 ata: 0x170 IDE port busy PCI: Setting latency timer of device 0000:00:1f.2 to 64 ata1: SATA max UDMA/133 cmd 0x1F0 ctl 0x3F6 bmdma 0xBFA0 irq 14 ata1: dev 0 cfg 49:0f00 82:746b 83:7fe8 84:4023 85:f469 86:3c48 87:4023 88:203f ata1: dev 0 ATA, max UDMA/100, 117210240 sectors: lba48 ata1: dev 0 configured for UDMA/100 scsi0 : ata_piix Vendor: ATA Model: HTE726060M9AT00 Rev: MH4O Type: Direct-Access ANSI SCSI revision: 05 SCSI device sda: 117210240 512-byte hdwr sectors (60012 MB) SCSI device sda: drive cache: write back SCSI device sda: 117210240 512-byte hdwr sectors (60012 MB) SCSI device sda: drive cache: write back sda: sda1 sda2 sda3 sda4 < sda5 sda6 sda7 > Attached scsi disk sda at scsi0, channel 0, id 0, lun 0 -- This is an email sent via the webforum on http://fcp.homelinux.org http://fcp.homelinux.org/modules/newbb/viewtopic.php?post_id=48153&topic_id=12166&forum=10#forumpost48153
