Ehci_hcd Error
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Status Importance Assigned to Milestone Linux Edit Invalid Medium linux-kernel-bugs #11159 linux (Fedora) Edit Invalid Unknown redhat-bugs #213411 linux (Ubuntu) Edit Won't Fix High Unassigned Edit Declined for what is ehci_hcd Gutsy by Henrik Nilsen Omma Declined for Intrepid by Sarah Kowalik Declined for ehci_hcd module Karmic by Steve Langasek Hardy Won't Fix High Unassigned Edit Intrepid Won't Fix High Unassigned Edit Jaunty Won't Fix
Ehci-pci
High Unassigned Edit linux-source-2.6.20 (Ubuntu) Edit Won't Fix High Unassigned Edit Declined for Gutsy by Henrik Nilsen Omma Declined for Intrepid by Sarah Kowalik Declined for Karmic by Steve Langasek Hardy Won't
What Is Ehci_hcd In Linux
Fix High Unassigned Edit Intrepid Won't Fix High Unassigned Edit Jaunty Won't Fix High Unassigned Edit linux-source-2.6.22 (Baltix) Edit Invalid Undecided Unassigned Edit linux-source-2.6.22 (Ubuntu) Edit Won't Fix High Unassigned Edit Declined for Gutsy by Henrik Nilsen Omma Declined for Intrepid by Sarah Kowalik Declined for Karmic by Steve Langasek Hardy Won't Fix High Unassigned Edit Intrepid Won't Fix Undecided Unassigned Edit Jaunty reset high-speed usb device number 10 using ehci-pci Won't Fix High Unassigned Edit Also affects project (?) Also affects distribution/package Nominate for series Bug Description Certain USB devices do not work properly, or do not work at all, while the ehci_hcd module is loaded. A solution is to unload the ehci_hcd module, which is loaded every time the computer starts, using the command 'sudo modprobe -r ehci_hcd'. This works fine but unfortunatly ehci-hcd is necessary for using USB 2.0, so you lose USB 2.0 features. Another solution is to disable USB 2.0 through the BIOS setup. With some devices it is possible to read files normally (ie. copy files from an USB pendrive to the computer), but the device disconnects abrubtly when you start writing data on the device. In some devices it fails after writing a certain amount of data, probably the size of the write cache. Steps to reproduce: 1. Insert your USB 2.0 device (like a flash drive) 2. If the device is recognised and mounted properly try copying a file to it. 3. Comfirm with the 'dmesg' command that it isn't functioning properly. (I/O errors etc) 4. Remove the USB device 5. Unlo
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Reset High-speed Usb Device Number Using Xhci_hcd
results. Bug5835 - High Speed USB devices don't work when ehci_hcd loaded, uhci_hcd work if removed Summary: High Speed USB devices don't work when ehci_hcd loaded, work if removed Status: REJECTED ehci pci linux INSUFFICIENT_DATA Product: Drivers Classification: Unclassified Component: USB Hardware: i386 Linux Importance: P2 normal Assigned To: David Brownell URL: Keywords: Depends on: Blocks: USB Show dependency tree /graph https://bugs.launchpad.net/bugs/88746 Reported: 2006-01-05 10:05 UTC by Wesley J. Landaker Modified: 2008-03-15 00:09 UTC (History) CC List: 10 users (show) bunk cw diegobz greg jch protasnb rick4711 stefan+kernel stern tjarls See Also: Kernel Version: 2.6.16 Tree: Mainline Regression: --- Attachments Modules loaded (1.92 KB, text/plain) 2006-02-19 04:36 UTC, Ra Details lspci Info (1.16 KB, text/plain) 2006-02-19 04:36 UTC, Ra Details https://bugzilla.kernel.org/show_bug.cgi?id=5835 lspci verbose (7.42 KB, text/plain) 2006-02-19 04:37 UTC, Ra Details lsusb information (261 bytes, text/plain) 2006-02-19 04:37 UTC, Ra Details lsusb verbose Info (12.09 KB, text/plain) 2006-02-19 04:38 UTC, Ra Details dmesg Information (12.78 KB, text/plain) 2006-02-19 04:38 UTC, Ra Details 2.6.17-rc0-git13-x86_64 dmesg (34.25 KB, text/plain) 2006-03-29 06:21 UTC, Vincent Fortier Details experimental 2.6.17-rc3 SET_ADDRESS patch (1.58 KB, patch) 2006-05-03 14:27 UTC, David Brownell Details | Diff refreshed ehci unlink patch (10.36 KB, patch) 2006-05-18 19:28 UTC, David Brownell Details | Diff Try to fix EHCI speed detection (579 bytes, patch) 2007-07-17 08:04 UTC, Alan Stern Details | Diff Dmesg output with CONFIG_PRINTK enabled (329.74 KB, text/x-log) 2007-07-23 21:15 UTC, rick4711 Details usbmon2.log (5.49 KB, text/x-log) 2007-07-24 11:30 UTC, rick4711 Details usbmon.log (5.49 KB, text/x-log) 2007-07-24 11:31 UTC, rick4711 Details usbmon_ok.log (51.41 KB, text/x-log) 2007-07-24 11:32 UTC, rick4711 Details Show Obsolete (1) View All Add an attachment (proposed patch, testcase, etc.) Description Wesley J. Landaker 2006-01-05 10:05:06 UTC Most recent kernel where this bug did not occur: never Distribution: Debian unstable (vanilla 2.6.15 kern
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and http://superuser.com/questions/668911/what-are-usb-device-resets policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Super User Questions Tags Users Badges Unanswered Ask Question _ Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute: Sign up Here's how it works: Anybody can what is ask a question Anybody can answer The best answers are voted up and rise to the top What are USB device resets? up vote 7 down vote favorite I have this brand-new software RAID-1 built with two WD Elements external USB drives, and I can see that Linux repeats the following message quite a bit: ... [302148.036912] usb 1-3.1: reset high-speed USB what is ehci_hcd device number 19 using ehci_hcd [302153.052029] usb 1-3.3: reset high-speed USB device number 20 using ehci_hcd [302186.031481] usb 1-3.3: reset high-speed USB device number 20 using ehci_hcd [302217.050210] usb 1-3.3: reset high-speed USB device number 20 using ehci_hcd [302281.043543] usb 1-3.3: reset high-speed USB device number 20 using ehci_hcd [302312.090158] usb 1-3.3: reset high-speed USB device number 20 using ehci_hcd [302351.076851] usb 1-3.1: reset high-speed USB device number 19 using ehci_hcd ... So, what does it say? Is this normal? Is this a problem that I should try to fix? Update Actually, these messages are not for the drives that I thought they were. I have a bunch of other USB drives connected to this computer via a USB hub as well. Anyway, my question is basically what does this message mean in plain English? linux usb share|improve this question edited Aug 1 at 3:10 bwDraco 26.1k24100137 asked Nov 3 '13 at 8:42 ILIV 251314 3 Making RAID from USB drives does not sound like good idea. RAID is all about reliably having all your drives, and USB is all about hot plugging and unpluggi