On Mon, Jul 18, 2016 at 2:24 PM, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote:
> This is not surprising, because the problem probably stems from the
> xHCI host controller in your computer, not from the hub.
Gigabyte is supposed to make reliable motherboards.
Haven't been trying to use USB3 until now, but still....
Given the repeatability, maybe I can dig into where stuff is going awry.
Maybe I can trace down how the bogus speed information is derived.
I do not believe "Link Power Management" is enabled, but don't know
exactly how to tell, either. It would not be terribly hard to make xhci_hcd
more noisy.
dmidecode output:
# dmidecode 2.12
# SMBIOS entry point at 0x000f04c0
SMBIOS 2.7 present.
58 structures occupying 2435 bytes.
Table at 0xBF5C4018.
Handle 0x0000, DMI type 0, 24 bytes
BIOS Information
Vendor: American Megatrends Inc.
Version: FA
Release Date: 10/23/2012
Address: 0xF0000
Runtime Size: 64 kB
ROM Size: 4096 kB
Characteristics:
PCI is supported
BIOS is upgradeable
BIOS shadowing is allowed
Boot from CD is supported
Selectable boot is supported
BIOS ROM is socketed
EDD is supported
5.25"/1.2 MB floppy services are supported (int 13h)
3.5"/720 kB floppy services are supported (int 13h)
3.5"/2.88 MB floppy services are supported (int 13h)
Print screen service is supported (int 5h)
8042 keyboard services are supported (int 9h)
Serial services are supported (int 14h)
Printer services are supported (int 17h)
ACPI is supported
USB legacy is supported
BIOS boot specification is supported
Targeted content distribution is supported
UEFI is supported
BIOS Revision: 4.6
Handle 0x0001, DMI type 1, 27 bytes
System Information
Manufacturer: Gigabyte Technology Co., Ltd.
Product Name: To be filled by O.E.M.
Version: To be filled by O.E.M.
Serial Number: To be filled by O.E.M.
UUID: 03DE0294-0480-050D-9C06-440700080009
Wake-up Type: Power Switch
SKU Number: To be filled by O.E.M.
Family: To be filled by O.E.M.
Handle 0x0002, DMI type 2, 15 bytes
Base Board Information
Manufacturer: AMD Corporation
Product Name: 990FXA-UD3
Version: x.x
Serial Number: To be filled by O.E.M.
Asset Tag: To be filled by O.E.M.
Features:
Board is a hosting board
Board is replaceable
Location In Chassis: To be filled by O.E.M.
Chassis Handle: 0x0003
Type: Motherboard
Contained Object Handles: 0
Handle 0x0003, DMI type 3, 22 bytes
Chassis Information
Manufacturer: Gigabyte Technology Co., Ltd.
Type: Desktop
Lock: Not Present
Version: To Be Filled By O.E.M.
Serial Number: To Be Filled By O.E.M.
Asset Tag: To Be Filled By O.E.M.
Boot-up State: Safe
Power Supply State: Safe
Thermal State: Safe
Security Status: None
OEM Information: 0x00000000
Height: Unspecified
Number Of Power Cords: 1
Contained Elements: 0
SKU Number: To be filled by O.E.M.
[...]
Handle 0x0012, DMI type 8, 9 bytes
Port Connector Information
Internal Reference Designator: J3A1
Internal Connector Type: None
External Reference Designator: USB1
External Connector Type: Access Bus (USB)
Port Type: USB
Handle 0x0013, DMI type 8, 9 bytes
Port Connector Information
Internal Reference Designator: J3A1
Internal Connector Type: None
External Reference Designator: USB2
External Connector Type: Access Bus (USB)
Port Type: USB
Handle 0x0014, DMI type 8, 9 bytes
Port Connector Information
Internal Reference Designator: J3A1
Internal Connector Type: None
External Reference Designator: USB3
External Connector Type: Access Bus (USB)
Port Type: USB
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