It seems as though my shiny new ipod nano can reproducibly trigger a
spurious disconnect message, which happens during heavy read activity
while having gtkpod scan for orphaned mp3s. I have a few hundred of
these thanks to amarok.
Here's what's printed after a few minutes of heavy scanning:
Dec 27 08:06:42 eggnog kernel: usb 4-3: USB disconnect, address 3
Dec 27 08:07:12 eggnog kernel: usb 4-3: usb_sg_cancel, unlink --> -19
Here's all usb related messages from the log:
Dec 27 07:49:34 eggnog kernel: Linux version 2.6.19.1 ([EMAIL PROTECTED]) (gcc
version 4.1.2 20060901 (prerelease) (Debian 4.1.1-13)) #2 PREEMPT Wed Dec 27
01:55:48 EST 2006
Dec 27 07:49:34 eggnog kernel: usbcore: registered new interface driver usbfs
Dec 27 07:49:34 eggnog kernel: usbcore: registered new interface driver hub
Dec 27 07:49:34 eggnog kernel: usbcore: registered new device driver usb
Dec 27 07:49:34 eggnog kernel: uhci_hcd 0000:00:10.0: UHCI Host Controller
Dec 27 07:49:34 eggnog kernel: uhci_hcd 0000:00:10.0: new USB bus registered,
assigned bus number 1
Dec 27 07:49:34 eggnog kernel: uhci_hcd 0000:00:10.0: irq 11, io base 0x0000d000
Dec 27 07:49:34 eggnog kernel: usb usb1: configuration #1 chosen from 1 choice
Dec 27 07:49:34 eggnog kernel: hub 1-0:1.0: USB hub found
Dec 27 07:49:34 eggnog kernel: hub 1-0:1.0: 2 ports detected
Dec 27 07:49:34 eggnog kernel: uhci_hcd 0000:00:10.1: UHCI Host Controller
Dec 27 07:49:34 eggnog kernel: uhci_hcd 0000:00:10.1: new USB bus registered,
assigned bus number 2
Dec 27 07:49:34 eggnog kernel: uhci_hcd 0000:00:10.1: irq 7, io base 0x0000d400
Dec 27 07:49:34 eggnog kernel: usb usb2: configuration #1 chosen from 1 choice
Dec 27 07:49:34 eggnog kernel: hub 2-0:1.0: USB hub found
Dec 27 07:49:34 eggnog kernel: hub 2-0:1.0: 2 ports detected
Dec 27 07:49:34 eggnog kernel: uhci_hcd 0000:00:10.2: UHCI Host Controller
Dec 27 07:49:34 eggnog kernel: uhci_hcd 0000:00:10.2: new USB bus registered,
assigned bus number 3
Dec 27 07:49:34 eggnog kernel: uhci_hcd 0000:00:10.2: irq 10, io base 0x0000d800
Dec 27 07:49:34 eggnog kernel: usb usb3: configuration #1 chosen from 1 choice
Dec 27 07:49:34 eggnog kernel: hub 3-0:1.0: USB hub found
Dec 27 07:49:34 eggnog kernel: hub 3-0:1.0: 2 ports detected
Dec 27 07:49:34 eggnog kernel: ehci_hcd 0000:00:10.3: EHCI Host Controller
Dec 27 07:49:34 eggnog kernel: ehci_hcd 0000:00:10.3: new USB bus registered,
assigned bus number 4
Dec 27 07:49:34 eggnog kernel: ehci_hcd 0000:00:10.3: irq 5, io mem 0xe6000000
Dec 27 07:49:34 eggnog kernel: ehci_hcd 0000:00:10.3: USB 2.0 started, EHCI
1.00, driver 10 Dec 2004
Dec 27 07:49:34 eggnog kernel: usb usb4: configuration #1 chosen from 1 choice
Dec 27 07:49:34 eggnog kernel: hub 4-0:1.0: USB hub found
Dec 27 07:49:34 eggnog kernel: hub 4-0:1.0: 6 ports detected
Dec 27 07:49:34 eggnog kernel: usb 2-2: new low speed USB device using uhci_hcd
and address 2
Dec 27 07:49:34 eggnog kernel: usb 2-2: configuration #1 chosen from 1 choice
Dec 27 07:49:34 eggnog kernel: EXT3 FS on hda4, internal journal
Dec 27 07:49:34 eggnog kernel: usbcore: registered new interface driver hiddev
Dec 27 07:49:34 eggnog kernel: hiddev96: USB HID v1.10 Device [APC Back-UPS ES
500 FW:801.e5.D USB FW:e5] on usb-0000:00:10.1-2
Dec 27 07:49:34 eggnog kernel: usbcore: registered new interface driver usbhid
Dec 27 07:49:34 eggnog kernel: drivers/usb/input/hid-core.c: v2.6:USB HID core
driver
Dec 27 07:51:16 eggnog kernel: usb 4-3: new high speed USB device using
ehci_hcd and address 3
Dec 27 07:51:16 eggnog kernel: usb 4-3: configuration #1 chosen from 2 choices
Dec 27 07:51:16 eggnog kernel: SCSI subsystem initialized
Dec 27 07:51:16 eggnog kernel: Initializing USB Mass Storage driver...
Dec 27 07:51:16 eggnog kernel: scsi0 : SCSI emulation for USB Mass Storage
devices
Dec 27 07:51:16 eggnog kernel: usb-storage: device found at 3
Dec 27 07:51:16 eggnog kernel: usb-storage: waiting for device to settle before
scanning
Dec 27 07:51:16 eggnog kernel: usbcore: registered new interface driver
usb-storage
Dec 27 07:51:16 eggnog kernel: USB Mass Storage support registered.
Dec 27 07:51:21 eggnog kernel: scsi 0:0:0:0: Direct-Access Apple iPod
1.62 PQ: 0 ANSI: 0
Dec 27 07:51:21 eggnog kernel: usb-storage: device scan complete
Dec 27 07:51:21 eggnog kernel: SCSI device sda: 1982464 2048-byte hdwr sectors
(4060 MB)
Dec 27 07:51:21 eggnog kernel: sda: Write Protect is off
Dec 27 07:51:21 eggnog kernel: sda: Mode Sense: 68 00 00 08
Dec 27 07:51:21 eggnog kernel: sda: assuming drive cache: write through
Dec 27 07:51:21 eggnog kernel: SCSI device sda: 1982464 2048-byte hdwr sectors
(4060 MB)
Dec 27 07:51:21 eggnog kernel: sda: Write Protect is off
Dec 27 07:51:21 eggnog kernel: sda: Mode Sense: 68 00 00 08
Dec 27 07:51:21 eggnog kernel: sda: assuming drive cache: write through
Dec 27 07:51:21 eggnog kernel: sda: sda1 sda2
Dec 27 07:51:21 eggnog kernel: sd 0:0:0:0: Attached scsi removable disk sda
Dec 27 08:06:42 eggnog kernel: usb 4-3: USB disconnect, address 3
Dec 27 08:07:12 eggnog kernel: usb 4-3: usb_sg_cancel, unlink --> -19
Dec 27 08:07:12 eggnog last message repeated 22 times
My other USB device is an APC UPS, which has been connected without
incident for a few weeks now.
Contents of /proc/interrupts:
CPU0
0: 817401 XT-PIC-XT timer
1: 8429 XT-PIC-XT i8042
2: 0 XT-PIC-XT cascade
5: 111834 XT-PIC-XT ehci_hcd:usb4
6: 3 XT-PIC-XT floppy
7: 6626 XT-PIC-XT uhci_hcd:usb2
8: 4 XT-PIC-XT rtc
9: 0 XT-PIC-XT acpi
10: 12636 XT-PIC-XT uhci_hcd:usb3, VIA8233
11: 201540 XT-PIC-XT uhci_hcd:usb1, eth0, fglrx
12: 49584 XT-PIC-XT i8042
14: 72597 XT-PIC-XT ide0
15: 31 XT-PIC-XT ide1
NMI: 0
LOC: 0
ERR: 0
MIS: 0
Would enabling USB debugging be a smart thing to do with all of this
i/o going on?
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