Hi, Alan.

I have some more information about the problem. I tried generating dmesg
logs from both a cold boot and a warm boot to see if things were
different and they were. I don't know if this information is significant
or not. Please feel free to guide me however you want.

First, simply having a cold boot gave me something like this:

(...)
drivers/usb/core/usb.c: registered new driver usbfs
drivers/usb/core/usb.c: registered new driver hub
drivers/usb/host/uhci-hcd.c: USB Universal Host Controller Interface driver v2.1
PCI: Found IRQ 9 for device 0000:00:04.2
PCI: Sharing IRQ 9 with 0000:00:04.3
PCI: Sharing IRQ 9 with 0000:00:09.0
PCI: Sharing IRQ 9 with 0000:00:0d.0
uhci_hcd 0000:00:04.2: UHCI Host Controller
uhci_hcd 0000:00:04.2: irq 9, io base 0000d400
uhci_hcd 0000:00:04.2: new USB bus registered, assigned bus number 1
drivers/usb/host/uhci-hcd.c: detected 2 ports
uhci_hcd 0000:00:04.2: root hub device address 1
usb usb1: new device strings: Mfr=3, Product=2, SerialNumber=1
drivers/usb/core/message.c: USB device number 1 default language ID 0x409
usb usb1: Product: UHCI Host Controller
usb usb1: Manufacturer: Linux 2.6.1-2 uhci_hcd
usb usb1: SerialNumber: 0000:00:04.2
drivers/usb/core/usb.c: usb_hotplug
usb usb1: registering 1-0:1.0 (config #1, interface 0)
drivers/usb/core/usb.c: usb_hotplug
hub 1-0:1.0: usb_probe_interface
hub 1-0:1.0: usb_probe_interface - got id
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 2 ports detected
hub 1-0:1.0: standalone hub
hub 1-0:1.0: ganged power switching
hub 1-0:1.0: global over-current protection
hub 1-0:1.0: Port indicators are not supported
hub 1-0:1.0: power on to power good time: 2ms
hub 1-0:1.0: hub controller current requirement: 0mA
hub 1-0:1.0: local power source is good
hub 1-0:1.0: no over-current condition exists
hub 1-0:1.0: enabling power on all ports
hub 1-0:1.0: power on: 0
hub 1-0:1.0: initial port 1 status: ret = 0
hub 1-0:1.0: port 1, status 300, change 3, 1.5 Mb/s
hub 1-0:1.0: clear C_CONNECTION1 = 0
hub 1-0:1.0: initial port 2 status: ret = 0
hub 1-0:1.0: port 2, status 300, change 3, 1.5 Mb/s
hub 1-0:1.0: clear C_CONNECTION1 = 0
hub 1-0:1.0: initial port 1 status: ret = 0
hub 1-0:1.0: port 1 enable change, status 300
hub 1-0:1.0: initial port 2 status: ret = 0
hub 1-0:1.0: port 2 enable change, status 300
hub 1-0:1.0: power on: 0
PCI: Found IRQ 9 for device 0000:00:04.3
PCI: Sharing IRQ 9 with 0000:00:04.2
PCI: Sharing IRQ 9 with 0000:00:09.0
PCI: Sharing IRQ 9 with 0000:00:0d.0
uhci_hcd 0000:00:04.3: UHCI Host Controller
uhci_hcd 0000:00:04.3: irq 9, io base 0000d000
uhci_hcd 0000:00:04.3: new USB bus registered, assigned bus number 2
drivers/usb/host/uhci-hcd.c: detected 2 ports
uhci_hcd 0000:00:04.3: root hub device address 1
usb usb2: new device strings: Mfr=3, Product=2, SerialNumber=1
drivers/usb/core/message.c: USB device number 1 default language ID 0x409
usb usb2: Product: UHCI Host Controller
usb usb2: Manufacturer: Linux 2.6.1-2 uhci_hcd
usb usb2: SerialNumber: 0000:00:04.3
drivers/usb/core/usb.c: usb_hotplug
usb usb2: registering 2-0:1.0 (config #1, interface 0)
drivers/usb/core/usb.c: usb_hotplug
hub 2-0:1.0: usb_probe_interface
hub 2-0:1.0: usb_probe_interface - got id
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 2 ports detected
hub 2-0:1.0: standalone hub
hub 2-0:1.0: ganged power switching
hub 2-0:1.0: global over-current protection
hub 2-0:1.0: Port indicators are not supported
hub 2-0:1.0: power on to power good time: 2ms
hub 2-0:1.0: hub controller current requirement: 0mA
hub 2-0:1.0: local power source is good
hub 2-0:1.0: no over-current condition exists
hub 2-0:1.0: enabling power on all ports
hub 2-0:1.0: power on: 0
drivers/usb/host/uhci-hcd.c: d400: suspend_hc
hub 2-0:1.0: initial port 1 status: ret = 0
hub 2-0:1.0: port 1, status 300, change 3, 1.5 Mb/s
hub 2-0:1.0: clear C_CONNECTION1 = 0
hub 2-0:1.0: initial port 2 status: ret = 0
hub 2-0:1.0: port 2, status 101, change 3, 12 Mb/s
hub 2-0:1.0: clear C_CONNECTION1 = 0
hub 2-0:1.0: port_status= 0, port 2 status 101 change 2
hub 2-0:1.0: port_status= 0, port 2 status 101 change 2
hub 2-0:1.0: port_status= 0, port 2 status 101 change 2
hub 2-0:1.0: port_status= 0, port 2 status 101 change 2
hub 2-0:1.0: port_status= 0, port 2 status 101 change 2
hub 2-0:1.0: debounce: port 2: delay 100ms stable 4 status 0x101
hub 2-0:1.0: port reset = 0
hub 2-0:1.0: wait_reset 0, port 2, status 103, change 0
hub 2-0:1.0: new USB device on port 2, assigned address 2
usb 2-2: new device strings: Mfr=1, Product=2, SerialNumber=0
drivers/usb/core/message.c: USB device number 2 default language ID 0x409
usb 2-2: Product: Generic USB Hub
usb 2-2: Manufacturer: ALCOR
drivers/usb/core/usb.c: usb_hotplug
hub 2-0:1.0: power on: 0
usb 2-2: registering 2-2:1.0 (config #1, interface 0)
drivers/usb/core/usb.c: usb_hotplug
hub 2-2:1.0: usb_probe_interface
hub 2-2:1.0: usb_probe_interface - got id
hub 2-2:1.0: USB hub found
hub 2-2:1.0: 4 ports detected
hub 2-2:1.0: standalone hub
hub 2-2:1.0: ganged power switching
hub 2-2:1.0: global over-current protection
hub 2-2:1.0: Port indicators are not supported
hub 2-2:1.0: power on to power good time: 44ms
hub 2-2:1.0: hub controller current requirement: 100mA
hub 2-2:1.0: local power source is good
hub 2-2:1.0: no over-current condition exists
hub 2-2:1.0: enabling power on all ports
hub 2-2:1.0: power on: 0
hub 2-2:1.0: power on: 0
hub 2-2:1.0: power on: 0
hub 2-2:1.0: power on: 0
hub 2-0:1.0: initial port 1 status: ret = 0
hub 2-0:1.0: port 1 enable change, status 300
hub 2-0:1.0: initial port 2 status: ret = 0

   If I remember correctly, I plugged the drive here.

drivers/usb/host/uhci-hcd.c: d400: wakeup_hc
hub 1-0:1.0: initial port 1 status: ret = 0
hub 1-0:1.0: initial port 2 status: ret = 0
hub 1-0:1.0: port 2, status 101, change 3, 12 Mb/s
hub 1-0:1.0: clear C_CONNECTION1 = 0
hub 1-0:1.0: port_status= 0, port 2 status 101 change 2
hub 1-0:1.0: port_status= 0, port 2 status 101 change 2
hub 1-0:1.0: port_status= 0, port 2 status 101 change 2
hub 1-0:1.0: port_status= 0, port 2 status 101 change 2
hub 1-0:1.0: port_status= 0, port 2 status 101 change 2
hub 1-0:1.0: debounce: port 2: delay 100ms stable 4 status 0x101
hub 1-0:1.0: port reset = 0
hub 1-0:1.0: wait_reset 0, port 2, status 103, change 0
hub 1-0:1.0: new USB device on port 2, assigned address 2
usb 1-2: new device strings: Mfr=1, Product=3, SerialNumber=0
drivers/usb/core/message.c: USB device number 2 default language ID 0x409
usb 1-2: Product: USB Embedded Hub
usb 1-2: Manufacturer: Leading Driver Co.,LTD.
drivers/usb/core/usb.c: usb_hotplug
usb 1-2: registering 1-2:1.0 (config #1, interface 0)
drivers/usb/core/usb.c: usb_hotplug
hub 1-2:1.0: usb_probe_interface
hub 1-2:1.0: usb_probe_interface - got id
hub 1-2:1.0: USB hub found
hub 1-2:1.0: 2 ports detected
hub 1-2:1.0: compound device; port removable status: FF
hub 1-2:1.0: individual port power switching
hub 1-2:1.0: individual port over-current protection
hub 1-2:1.0: Port indicators are not supported
hub 1-2:1.0: power on to power good time: 100ms
hub 1-2:1.0: hub controller current requirement: 100mA
hub 1-2:1.0: local power source is lost (inactive)
hub 1-2:1.0: no over-current condition exists
hub 1-2:1.0: enabling power on all ports
hub 1-2:1.0: power on: 0
hub 1-2:1.0: power on: 0
hub 1-2:1.0: transfer --> -75
usb 1-2: control timeout on ep0in

Ok. This time I didn't try to load usb-storage.

I also tried to plug and unplug the drive and the messages that I got
were only these:

--- dmesg-cold-boot.txt 2004-01-22 01:10:45.000000000 -0200
+++ dmesg-cold-boot-plug-replug.txt     2004-01-22 01:13:05.000000000 -0200
@@ -282,3 +282,8 @@
 hub 1-2:1.0: power on: 0
 hub 1-2:1.0: transfer --> -75
 usb 1-2: control timeout on ep0in
+drivers/usb/host/uhci-hcd.c: d400: suspend_hc
+hub 1-2:1.0: hub_port_status failed (err = -110)
+hub 1-2:1.0: initial port 1 status: ret = -110
+drivers/usb/host/uhci-hcd.c: d400: wakeup_hc
+usb 1-2: control timeout on ep0in

Ok, then I tried a warm boot after this and got the following
differences in the logs. I don't know if they say something
significantly different, but I noticed some changes in status of port 2
between the logs. The diff below is relative to the situation when I
have not yet plugged the drive, but only loaded the uhci-hcd module:

--- dmesg-cold-boot.txt 2004-01-22 01:10:45.000000000 -0200
+++ dmesg-warm-boot.txt 2004-01-22 01:15:38.000000000 -0200
@@ -162,12 +162,12 @@
 hub 1-0:1.0: port 1, status 300, change 3, 1.5 Mb/s
 hub 1-0:1.0: clear C_CONNECTION1 = 0
 hub 1-0:1.0: initial port 2 status: ret = 0
-hub 1-0:1.0: port 2, status 300, change 3, 1.5 Mb/s
+hub 1-0:1.0: port 2, status 100, change 3, 12 Mb/s
 hub 1-0:1.0: clear C_CONNECTION1 = 0
 hub 1-0:1.0: initial port 1 status: ret = 0
 hub 1-0:1.0: port 1 enable change, status 300
 hub 1-0:1.0: initial port 2 status: ret = 0
-hub 1-0:1.0: port 2 enable change, status 300
+hub 1-0:1.0: port 2 enable change, status 100
 hub 1-0:1.0: power on: 0
 PCI: Found IRQ 9 for device 0000:00:04.3
 PCI: Sharing IRQ 9 with 0000:00:04.2
@@ -244,16 +244,16 @@
 hub 2-0:1.0: initial port 1 status: ret = 0
 hub 2-0:1.0: port 1 enable change, status 300
 hub 2-0:1.0: initial port 2 status: ret = 0
-drivers/usb/host/uhci-hcd.c: d400: wakeup_hc
 hub 1-0:1.0: initial port 1 status: ret = 0
 hub 1-0:1.0: initial port 2 status: ret = 0
-hub 1-0:1.0: port 2, status 101, change 3, 12 Mb/s
+hub 1-0:1.0: port 2, status 101, change 1, 12 Mb/s
 hub 1-0:1.0: clear C_CONNECTION1 = 0
-hub 1-0:1.0: port_status= 0, port 2 status 101 change 2
-hub 1-0:1.0: port_status= 0, port 2 status 101 change 2
-hub 1-0:1.0: port_status= 0, port 2 status 101 change 2
-hub 1-0:1.0: port_status= 0, port 2 status 101 change 2
-hub 1-0:1.0: port_status= 0, port 2 status 101 change 2
+hub 1-0:1.0: port_status= 0, port 2 status 101 change 0
+drivers/usb/host/uhci-hcd.c: d400: wakeup_hc
+hub 1-0:1.0: port_status= 0, port 2 status 101 change 0
+hub 1-0:1.0: port_status= 0, port 2 status 101 change 0
+hub 1-0:1.0: port_status= 0, port 2 status 101 change 0
+hub 1-0:1.0: port_status= 0, port 2 status 101 change 0
 hub 1-0:1.0: debounce: port 2: delay 100ms stable 4 status 0x101
 hub 1-0:1.0: port reset = 0
 hub 1-0:1.0: wait_reset 0, port 2, status 103, change 0
@@ -279,6 +279,5 @@
 hub 1-2:1.0: no over-current condition exists
 hub 1-2:1.0: enabling power on all ports
 hub 1-2:1.0: power on: 0
-hub 1-2:1.0: power on: 0
 hub 1-2:1.0: transfer --> -75
-usb 1-2: control timeout on ep0in
+usb 1-2: control timeout on ep0out

Ok, then, plugging the drive, unplugging the drive and replugging it in
this very same warm boot session gives me the following additional
lines (the last lines do seem scary):

--- dmesg-warm-boot.txt 2004-01-22 01:15:38.000000000 -0200
+++ dmesg-warm-boot-plug-replug.txt     2004-01-22 01:17:46.000000000 -0200
@@ -281,3 +281,15 @@
 hub 1-2:1.0: power on: 0
 hub 1-2:1.0: transfer --> -75
 usb 1-2: control timeout on ep0out
+drivers/usb/host/uhci-hcd.c: d400: suspend_hc
+hub 1-2:1.0: power on: -110
+drivers/usb/host/uhci-hcd.c: d400: wakeup_hc
+hub 1-0:1.0: initial port 1 status: ret = 0
+hub 1-0:1.0: initial port 2 status: ret = 0
+hub 1-0:1.0: port 2, status 101, change 3, 12 Mb/s
+hub 1-0:1.0: clear C_CONNECTION1 = 0
+usb 1-2: USB disconnect, address 2
+usb 1-2: usb_disable_device nuking all URBs
+uhci_hcd 0000:00:04.2: shutdown urb d7694b00 pipe 40408280 ep1in-intr
+usb 1-2: unregistering interface 1-2:1.0
+usb 1-2: hcd_unlink_urb d7694b00 fail -16

Does this help? I can simulate other situations with the drive, if you
want me to.


Thank you, Rogério.

-- 
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
  Rogério Brito - [EMAIL PROTECTED] - http://www.ime.usp.br/~rbrito
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=


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