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Message #02151
[Bug 359356] Re: USB device attached to different ttyUSB after resume from suspend to RAM
** Description changed:
+ Update: As for Xubuntu 10.04 at least, please read comment #5
+
OS: 8.10
USB device is attached to /dev/ttyUSB0 when I plug it in USB port. But
when I suspend to RAM and resume, it gets attached to /dev/ttyUSB1.
Consequently, the daemon configured using /dev/ttyUSB0 does not work
after resume. I would expect the device to be attached to the same
ttyUSB before and after.
Details of the device (from output of lsusb -v):
Bus 003 Device 010: 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 A5001qxI
- 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
+ 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 A5001qxI
+ 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)
+ (Bus Powered)
--
USB device attached to different ttyUSB after resume from suspend to RAM
https://bugs.launchpad.net/bugs/359356
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Status in “lirc” package in Ubuntu: New
Bug description:
Update: As for Xubuntu 10.04 at least, please read comment #5
OS: 8.10
USB device is attached to /dev/ttyUSB0 when I plug it in USB port. But when I suspend to RAM and resume, it gets attached to /dev/ttyUSB1. Consequently, the daemon configured using /dev/ttyUSB0 does not work after resume. I would expect the device to be attached to the same ttyUSB before and after.
Details of the device (from output of lsusb -v):
Bus 003 Device 010: 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 A5001qxI
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)
