Unfortunately the fix seems to be incomplete for me.
$ cat /proc/version_signature
Ubuntu 2.6.32-28.55-generic 2.6.32.27+drm33.12
$ uname -a
Linux ubuntu 2.6.32-28-generic #55-Ubuntu SMP Mon Jan 10 21:21:01 UTC 2011 i686
GNU/Linux
Reverting the commit 55b5b5448771f964776a716227afd3ddef2c860e does help, but it
appears that another regression has appeared in the meantime. After about 18h I
start getting this error from digitemp (I am calling it from cron once every
15min)
Error 5: DS2480B Adapter Not Detected
Error 10: Read COM Failed
Error 10: Read COM Failed
Error 10: Read COM Failed
Error 10: Read COM Failed
Error 10: Read COM Failed
Error 10: Read COM Failed
Error 10: Read COM Failed
Error 10: Read COM Failed
Error 10: Read COM Failed
Once the system gets into this state, it persists until reboot.
I do not see this problem with 2.6.32-26-generic, patched so that
55b5b5448771f964776a716227afd3ddef2c860e is reverted.
lsusb still sees the device:
$ lsusb
Bus 005 Device 003: ID 046d:c03d Logitech, Inc. M-BT96a Pilot Optical Mouse
Bus 005 Device 002: ID 0403:6001 Future Technology Devices International, Ltd
FT232 USB-Serial (UART) IC
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 003: ID 413c:2003 Dell Computer Corp. Keyboard
Bus 002 Device 002: ID 03f0:3611 Hewlett-Packard PSC 2410 PhotoSmart
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
$ sudo lsusb -v -d 0403:6001
Bus 005 Device 002: ID 0403:6001 Future Technology Devices International, Ltd
FT232 USB-Serial (UART) IC
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 8
idVendor 0x0403 Future Technology Devices International, Ltd
idProduct 0x6001 FT232 USB-Serial (UART) IC
bcdDevice 6.00
iManufacturer 1 FTDI
iProduct 2 FT232R USB UART
iSerial 3 A900a3DX
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 32
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xa0
(Bus Powered)
Remote Wakeup
MaxPower 90mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 2 FT232R USB UART
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Device Status: 0x0000
(Bus Powered)
The device node seems to have normal permissions
$ ls -l /dev/ttyUSB0
0 crw-rw---- 1 root dialout 188, 0 2011-01-29 20:50 /dev/ttyUSB0
stracing with the device in this state shows digitemp
(3.5.0ds1-1ubuntu1) trying to select() a file descriptor (with the same
arguments as in the working case,) and timing out. straces for both
kernels are attached.
If I unplug and replug the device I see this in syslog:
[71833.368048] usb 5-1: USB disconnect, address 2
[71833.368231] ftdi_sio ttyUSB0: FTDI USB Serial Device converter now
disconnected from ttyUSB0
[71833.368252] ftdi_sio 5-1:1.0: device disconnected
[71837.328016] usb 5-1: new full speed USB device using uhci_hcd and address 4
[71837.526685] usb 5-1: configuration #1 chosen from 1 choice
[71837.534634] ftdi_sio 5-1:1.0: FTDI USB Serial Device converter detected
[71837.534671] usb 5-1: Detected FT232RL
[71837.534674] usb 5-1: Number of endpoints 2
[71837.534676] usb 5-1: Endpoint 1 MaxPacketSize 64
[71837.534679] usb 5-1: Endpoint 2 MaxPacketSize 64
[71837.534681] usb 5-1: Setting MaxPacketSize 64
[71837.535923] usb 5-1: FTDI USB Serial Device converter now attached to ttyUSB0
and the device is working again.
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https://bugs.launchpad.net/bugs/690798
Title:
arduino USB serial device breaks on lucid kernel upgrade
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