On Tue, 10 Jul 2007 21:42:39 -0400 [EMAIL PROTECTED] wrote: > I refitted the 4 patches you posted to a 22-rc6-mm1 kernel, and tried it on > my Dell Latitude D820 laptop, using the libata driver for the disk and DVD. > I got this: > > [ 0.702000] scsi0 : ata_piix > [ 0.702000] scsi1 : ata_piix > [ 0.702000] ata1: SATA max UDMA/133 cmd 0x00000000000101f0 ctl > 0x00000000000103f6 bmdma 0x > 000000000001bfa0 irq 14 > [ 0.702000] ata2: PATA max UDMA/100 cmd 0x0000000000010170 ctl > 0x0000000000010376 bmdma 0x > 000000000001bfa8 irq 15 > [ 0.857000] ata1.00: ATA-7: ST980825AS, 8.04, max UDMA/133 > [ 0.857000] ata1.00: 156301488 sectors, multi 8: LBA48 NCQ (depth 0/32) > [ 0.864000] ata1.00: configured for UDMA/133 > [ 1.169000] ata2.00: ATAPI: PHILIPS DVD+/-RW SDVD8820, AD15, max UDMA/33 > [ 1.342000] ata2.00: configured for UDMA/33 > .... > [ 1.342000] sda: sda1 sda2 > [ 1.433000] sd 0:0:0:0: [sda] Attached SCSI disk > [ 1.435000] scsi 1:0:0:0: CD-ROM PHILIPS DVD+-RW SDVD8820 AD15 > PQ: 0 ANSI: 5 > [ 1.454000] sr0: scsi3-mmc drive: 24x/24x writer cd/rw xa/form2 cdda tray > [ 1.454000] Uniform CD-ROM driver Revision: 3.20 > [ 1.454000] sr 1:0:0:0: Attached scsi CD-ROM sr0 > [ 1.454000] ata2.00: Unable to set Link PM policy > > and /sys/class/scsi_host/host[01]/link_power_management_policy are both > stuck at 'max_performance'. After reading the code,it *appears* that this > is because: > > host0 - the 2 ports on the first ATA chain, and it's stuck because the DVD > doesn't support the required power management, and *all* devices on the chain > need to support it (as it didnt complain on ata1, the hard drive). > > host1 - the second ATA chain, not connected to anything, so no PM available. > > How do I double-check my analysis? Neither hdparm nor sdparm gave me anything > on /dev/dvd that told me either way, and I'd like to verify that the base > problem is "screwed by the hardware" before I give up.... > > >
Hi, I only implemented the needed support for using ALPM for the ahci driver, and it looks like you are using ata_piix. Kristen - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
