2.6.39-rc5-mmotm0429 and later - delay detecting DVD at boot

[Valdis . Kletnieks]

Hardware: Dell Latitude E6500 laptop.

In kernel 2.6.39-rc5-mmotm0429 and later, I see this 10-second pause at boot:

[    1.231050] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[    1.231988] ata1.00: ATA-8: WDC WD1600BJKT-75F4T0, 11.01A11, max UDMA/133
[    1.231991] ata1.00: 312581808 sectors, multi 0: LBA48 NCQ (depth 31/32), AA
[    1.232906] ata1.00: configured for UDMA/133
[    1.233704] scsi 0:0:0:0: Direct-Access     ATA      WDC WD1600BJKT-7 11.0 PQ: 0 ANSI: 5
[    1.234428] sd 0:0:0:0: [sda] 312581808 512-byte logical blocks: (160 GB/149 GiB)
[    1.234636] sd 0:0:0:0: [sda] Write Protect is off
[    1.234639] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
[    1.234712] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[    1.235580] sda: detected capacity change from 0 to 160041885696
[    1.266786]  sda: sda1 sda2
[    1.267681] sd 0:0:0:0: [sda] Attached SCSI disk
[    6.588040] ata2: link is slow to respond, please be patient (ready=0)
[   11.280039] ata2: COMRESET failed (errno=-16)
[   11.585046] ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[   11.586633] ata2.00: ATAPI: MATSHITA DVD+/-RW UJ892, 1.01, max UDMA/100
[   11.589048] ata2.00: configured for UDMA/100
[   11.592387] scsi 1:0:0:0: CD-ROM            MATSHITA DVD+-RW UJ892    1.01 PQ: 0 ANSI: 5
[   11.595167] sr0: scsi3-mmc drive: 24x/24x writer dvd-ram cd/rw xa/form2 cdda tray
[   11.595171] cdrom: Uniform CD-ROM driver Revision: 3.20
[   11.595697] sr 1:0:0:0: Attached scsi CD-ROM sr0
[   11.901042] ata5: SATA link down (SStatus 0 SControl 300)
[   12.206042] ata6: SATA link down (SStatus 0 SControl 300)

Previously working boot had this:

[    1.253038] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[    1.253987] ata1.00: ATA-8: WDC WD1600BJKT-75F4T0, 11.01A11, max UDMA/133
[    1.253991] ata1.00: 312581808 sectors, multi 0: LBA48 NCQ (depth 31/32), AA
[    1.254928] ata1.00: configured for UDMA/133
[    1.255709] scsi 0:0:0:0: Direct-Access     ATA      WDC WD1600BJKT-7 11.0 PQ: 0 ANSI: 5
[    1.256717] sd 0:0:0:0: [sda] 312581808 512-byte logical blocks: (160 GB/149 GiB)
[    1.256937] sd 0:0:0:0: [sda] Write Protect is off
[    1.256941] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
[    1.257026] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[    1.283598]  sda: sda1 sda2
[    1.284607] sd 0:0:0:0: [sda] Attached SCSI disk
[    1.979041] ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[    1.980625] ata2.00: ATAPI: MATSHITA DVD+/-RW UJ892, 1.01, max UDMA/100
[    1.982976] ata2.00: configured for UDMA/100
[    1.986303] scsi 1:0:0:0: CD-ROM            MATSHITA DVD+-RW UJ892    1.01 PQ: 0 ANSI: 5
[    1.989312] sr0: scsi3-mmc drive: 24x/24x writer dvd-ram cd/rw xa/form2 cdda tray
[    1.989316] cdrom: Uniform CD-ROM driver Revision: 3.20
[    1.989998] sr 1:0:0:0: Attached scsi CD-ROM sr0
[    2.295035] ata5: SATA link down (SStatus 0 SControl 300)
[    2.600035] ata6: SATA link down (SStatus 0 SControl 300)

I'll have some time to bisect this one this weekend, if it doesn't ring any bells. I see one
other posting on lkml  on 05/06 from Andy Lutomirski about 'Cougar Point' regression:

http://marc.info/?l=linux-kernel&m=130479522525753&w=2

but no follow-ups that I've found.

Not sure if my laptop has whatever Cougar Point is - lspci reports:

00:00.0 Host bridge: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub (rev 07)
00:01.0 PCI bridge: Intel Corporation Mobile 4 Series Chipset PCI Express Graphics Port (rev 07)
00:19.0 Ethernet controller: Intel Corporation 82567LM Gigabit Network Connection (rev 03)
00:1a.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 (rev 03)
00:1a.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 (rev 03)
00:1a.2 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 (rev 03)
00:1a.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 (rev 03)
00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 03)
00:1c.0 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 (rev 03)
00:1c.1 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 2 (rev 03)
00:1c.2 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 3 (rev 03)
00:1c.3 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 4 (rev 03)
00:1d.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 03)
00:1d.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 03)
00:1d.2 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 (rev 03)
00:1d.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 03)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev 93)
00:1f.0 ISA bridge: Intel Corporation ICH9M-E LPC Interface Controller (rev 03)
00:1f.2 RAID bus controller: Intel Corporation Mobile 82801 SATA RAID Controller (rev 03)

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