There seems to be a regression in last kernels: in 4.4.0-57, 4.4.0-53,
4.4.0-47 the problem came back:
[ 6.674209] usb 2-1.2: device descriptor read/64, error -110
[ 20.713076] random: nonblocking pool is initialized
[ 21.849908] usb 2-1.2: device descriptor read/64, error -110
[ 22.025915] usb 2-1.2: new high-speed USB device number 4 using ehci-pci
[ 22.109900] usb 2-1.2: device descriptor read/64, error -71
[ 22.297898] usb 2-1.2: device descriptor read/64, error -71
[ 22.473897] usb 2-1.2: new high-speed USB device number 5 using ehci-pci
[ 22.889887] usb 2-1.2: device not accepting address 5, error -71
[ 22.961884] usb 2-1.2: new high-speed USB device number 6 using ehci-pci
[ 23.377873] usb 2-1.2: device not accepting address 6, error -71
[ 23.379607] usb 2-1-port2: unable to enumerate USB device
The latest working kernel is 4.4.0-45.
** Changed in: linux (Ubuntu)
Status: Fix Released => Confirmed
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https://bugs.launchpad.net/bugs/1534948
Title:
Ubuntu 15.10 fails to boot from Sandisk USB stick
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