> sd 8:0:0:0: Write cache: disabled, read cache: enabled, doesn't support DPO or FUA > sd 8:0:0:0: Attached scsi generic sg3 type 0 > scsi 8:0:0:0: Direct-Access SanDisk Cruzer Glide 1.26 PQ: 0 ANSI: 5 > usb-storage 8-1.4:1.0: USB Mass Storage device detected > usb 8-1.4: Product: Firebird USB Flash Drive > usb 8-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3 > usb 8-1.4: New USB device found, idVendor=0781, idProduct=5575, bcdDevice= 1.26 > usb usb7-port1: unable to enumerate USB deviceĪnd a diff of dmesg before and after the same USB thumb drive is plugged into a working USB 3.0 port: > usb 8-1.4: new high-speed USB device number 12 using xhci_hcd > usb 7-1: device not accepting address 55, error -32 > usb 7-1: new full-speed USB device number 55 using ohci-pci > usb 7-1: device not accepting address 54, error -32 > usb 7-1: new full-speed USB device number 54 using ohci-pci > usb 7-1: new full-speed USB device number 53 using ohci-pci > usb 7-1: device descriptor read/64, error -32 > usb 7-1: new full-speed USB device number 52 using ohci-pci > usb usb3-port1: unable to enumerate USB device > usb 3-1: device not accepting address 22, error -32 > usb 3-1: new high-speed USB device number 22 using ehci-pci > usb 3-1: device not accepting address 21, error -32 > usb 3-1: new high-speed USB device number 21 using ehci-pci

> usb 3-1: new high-speed USB device number 20 using ehci-pci > usb 3-1: device descriptor read/64, error -32 Here's a diff of dmesg before and after a USB thumb drive is plugged into the non-working port: > usb 3-1: new high-speed USB device number 19 using ehci-pci My motherboard's USB 2.0 ports work well in Windows still, and dmesg shows that the ports are still detected. I recently upgraded to Ubuntu 18.10 (Cosmic Cuttlefish), and now only my USB 3.0 ports seem to work.

Usb 2 vs usb 3 for flashing bios