Why is the error "kernel: usb 1-2.2: reset high speed USB device using ehci_hcd and address 6" written to the /var/log/messages file?

Solution Verified - Updated -

Environment

  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 5

Issue

  • Why getting the below error message under /var/log/messages file ?
Aug 22 00:52:01 localhost kernel: usb 1-2.2: reset high speed USB device using ehci_hcd and address 6
Aug 22 01:10:08 localhost kernel: usb 1-2.2: reset high speed USB device using ehci_hcd and address 6
Aug 22 04:04:34 localhost init: Trying to re-exec init
Aug 22 06:21:16 localhost kernel: usb 1-2.2: reset high speed USB device using ehci_hcd and address 6
Aug 22 12:47:14 localhost kernel: usb 1-2.2: reset high speed USB device using ehci_hcd and address 6
Aug 22 16:34:29 localhost last message repeated 2 times
Aug 22 17:21:17 localhost kernel: usb 1-2.2: reset high speed USB device using ehci_hcd and address 6
Aug 22 17:41:32 localhost kernel: Warning: /proc/ide/hd?/settings interface is obsolete, and will be removed soon!

Resolution

  • To fix this problem may be following steps will be helpful:
    1. Replace hardware: In most cases you need to replace the motherboard.
    2. Remove ehci_hcd driver temporarily
    3. Disable ehci_hcd drive USB 2.0 interface and use it as USB 1.1. In short disable the ehci_hcd.

Disabling the ehci_hcd driver

1) Blacklist ehci_hcd driver by editing the appropriate modprobe configuration file indicated below with the entry listed:

  • RHEL6 /etc/modprobe.d/blacklist.conf file.
  • RHEL5 /etc/modprobe.d/blacklist.conf file.
blacklist ehci_hcd



2) Save and close the file. Finally, use the mkinitrd script to construct a directory structure that can serve as an initrd root file system without ehci_hcd:

On RHEL5
// Backup the initrd at first
# cp /boot/initrd-$(uname -r).img /boot/initrd-$(uname -r).img.bak

// Rebuild initrd
# mkinitrd -f -v /boot/initrd-$(uname -r).img $(uname -r)

On RHEL6
//Backup the initramfs at first
# cp /boot/initramfs-$(uname -r).img /boot/initramfs-$(uname -r).img.bak

//Rebuild initramfs
# dracut -f 



3) For testing purpose reboot the system:

# reboot

Root Cause

  • The Enhanced Host Controller Interface (EHCI) is a register-level interface that enables a host controller for USB or FireWire hardware to communicate with a host controller driver in software.

  • This error indicates that USB 2.0 may not function on your system, or may function only at USB 1.1 speeds.

Diagnostic Steps

  • To collect more information about the EHCI controller, following commands can be used:
# lspci |grep -i ehci
# lsusb -v | less

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