On Mon, Sep 15, 2014 at 4:14 PM, Greg KH g...@kroah.com wrote:
On Mon, Sep 15, 2014 at 04:07:30PM +0200, Julian Andres Klode wrote:
[Originally reported at
https://bugzilla.kernel.org/show_bug.cgi?id=84611, gregkh told me to
report it here]
My brother's USB 3.0 stick is only recognized as USB 2.0.
I reproduced this bug in kernels 3.14.15, 3.16, and 3.16.2; as built by
Debian.
It used to work correctly in 3.14-rc6. The data below is from 3.14.15.
What does older kernels show differently?
Sorry, I did not have any older kernels to try, but it turns out that
it works again in 3.16.3:
[253555.332809] usb 4-2: new SuperSpeed USB device number 3 using xhci_hcd
[253555.349384] usb 4-2: New USB device found, idVendor=8564, idProduct=1000
[253555.349402] usb 4-2: New USB device strings: Mfr=1, Product=2,
SerialNumber=3
[253555.349405] usb 4-2: Product: Mass Storage Device
[253555.349407] usb 4-2: Manufacturer: JetFlash
[253555.349409] usb 4-2: SerialNumber: 4208253730
[253555.349790] usb-storage 4-2:1.0: USB Mass Storage device detected
[253555.349867] scsi8 : usb-storage 4-2:1.0
[253556.349529] scsi 8:0:0:0: Direct-Access JetFlash Transcend
32GB 1.00 PQ: 0 ANSI: 6
[253556.350344] sd 8:0:0:0: Attached scsi generic sg2 type 0
[253556.353751] sd 8:0:0:0: [sdc] 61734912 512-byte logical blocks:
(31.6 GB/29.4 GiB)
[253556.353912] sd 8:0:0:0: [sdc] Write Protect is off
[253556.353919] sd 8:0:0:0: [sdc] Mode Sense: 23 00 00 00
[253556.354061] sd 8:0:0:0: [sdc] Write cache: disabled, read cache:
disabled, doesn't support DPO or FUA
[253556.355885] sdc: sdc1
[253556.356771] sd 8:0:0:0: [sdc] Attached SCSI removable disk
[253556.555460] FAT-fs (sdc1): utf8 is not a recommended IO charset
for FAT filesystems, filesystem will be case sensitive!
[253556.557563] FAT-fs (sdc1): Volume was not properly unmounted. Some
data may be corrupt. Please run fsck.
It's not entirely clear why, though - I don't see anything related in
the 3.16.3 changelog or the Debian packaging changelog. It's also
reporting different values in lsusb now (especially serial, not sure
if important, and the bus number is different; but there is only one
xhci bus in the laptop, so it must be the same one):
Bus 004 Device 003: ID 8564:1000
Device Descriptor:
bLength18
bDescriptorType 1
bcdUSB 3.00
bDeviceClass0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 9
idVendor 0x8564
idProduct 0x1000
bcdDevice 10.75
iManufacturer 1 JetFlash
iProduct2 Mass Storage Device
iSerial 3 4208253730
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 44
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 76mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 8 Mass Storage
bInterfaceSubClass 6 SCSI
bInterfaceProtocol 80 Bulk-Only
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes2
Transfer TypeBulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0400 1x 1024 bytes
bInterval 0
bMaxBurst 15
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes2
Transfer TypeBulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0400 1x 1024 bytes
bInterval 0
bMaxBurst 15
Binary Object Store Descriptor:
bLength 5
bDescriptorType15
wTotalLength 22
bNumDeviceCaps 2
USB 2.0 Extension Device Capability:
bLength 7
bDescriptorType16
bDevCapabilityType 2
bmAttributes 0x0002
Link Power Management (LPM) Supported
SuperSpeed USB Device Capability:
bLength10
bDescriptorType16
bDevCapabilityType 3
bmAttributes 0x00
wSpeedsSupported 0x000e
Device can operate at Full Speed (12Mbps)
Device can operate at High Speed (480Mbps)
Device can operate at SuperSpeed (5Gbps)
bFunctionalitySupport 1
Lowest fully-functional device speed is Full Speed (12Mbps)
bU1DevExitLat 10 micro seconds
