[ale] USB reset error in dmesg [SOLVED]

Mon Jun 18 13:33:16 EDT 2012

wow! underscores that some hardware platforms are just a bit "funky"

On Mon, Jun 18, 2012 at 11:52 AM, Rich Faulkner <rfaulkner at tux86.org> wrote:

> **
> Believe I've found the solution to this so thought I'd share it here...
>
> I was able to narrow down a few factors in this:
>
> 1.  Issue dependent on v5 RHEL family (driver related)
> 2.  Issue effected by changing feature in BIOS (memory related)
> 3.  Issue centered around EHCI driver and visible as power loss in USB
> optical mouse (power related)
>
> This pointed me toward a BIOS feature for Intel Power Technology.
> Disabling this feature allowed proper functionality of the device (in this
> case the USB optical mouse).  Further digging into the feature found that
> setting the Processor C State limit to [C0] provides operational
> functionality w/o power-up/down of USB optical mouse.  No further errors
> observed.
>
> Waiting to hear results of field testing but I think this is it:  that
> when low/high speed devices are connected through a USB 2.0 hub to the EHCI
> hub with Energy Efficiency enabled; the EHCI starts split transactions, but
> gets delayed while trying to access memory.  Because of this, EHCI cannot
> complete the split transaction before the transaction translator in the hub
> discards the data.  The hid-core driver retires the transaction but it also
> fails and the USB device is reset.
>
> It is notable that this behaviour is not seen using this BIOS and RHEL 6.x
> (CentOS or Scientific Linux).
>
> Cheers!
>
> RinL
>
>
>
>
> On Sat, 2012-06-16 at 04:21 -0400, Rich Faulkner wrote:
>
> Attaching a PS/2 mouse and keyboard resolve the error but by only removing
> the device(s) that are causing the problem.  That is not a solution as all
> USB have to be working.  I have recommended that the OS be migrated to 6.x
> but don't know that this will be accepted.  Another find was setting the
> BIOS to support multi-monitor mode (an interesting connection); the error
> is not induced.  Only in single-monitor mode does the USB mouse/keyboard go
> bugger.  So there is a BIOS connection here for resource allocation that
> interacts with EHCI driver (or USB driver) and the function of low-speed
> USB device(s).
>
> In the end, the mouse and keyboard are constantly powering-up and down.
> Looks like they fail and reinitialize; then fail; then initialize.  Up,
> down, up down...sand-a-floor; side-to-side...you get my drift...
>
>
> On Fri, 2012-06-15 at 17:13 -0400, Jim Kinney wrote:
>
> Oh. good catch! I have not had the chance to look at "the piles" here
>
> So disconnecting the mouse will stop the failures?
>
> On Fri, Jun 15, 2012 at 5:09 PM, Rich Faulkner <rfaulkner at tux86.org>
> wrote:
>
> The plot thickens:  found the MS USB mouse is at issue...
>
> - The low speed USB device using ehci_hcd and address 3 is the Microsoft
> 3-Button Mouse as / class/ input/ input0 on usb-0000:00:1d.0-1.1
>
> - dmesg indicates:  PCI: cache line size of 32 is not supported by device
> 0000:00:1d.0
>
> - I can see the USB 2.0, and EHCI 1.00 driver started for this device as
> well
>
> Observation of the mouse shows power blinking-off periodically.  Keyboard
> (USB) acts like it has sticking keys periodically.  I suspect this will
> goof-up most anything attached to the USB bus.
>
> I have been trying some kernel parameters to grub.conf but no improvement
> thus far to the mouse.  (Only got rid of an issue concerning mtrr).
> Another hint in this is that when you set the BIOS for multi-monitor
> support the problem goes away.  (Yes, I know we could set that and leave it
> but that's not the point.  Need to find the fix for this other than a
> workaround like 6.x or the BIOS setting).
>
> TIA.......Rich
>
>
>
>  Chipset is the Intel C206 (PCH).   Datasheet for the SHB is here:
> http://www.trentontechnology.com/downloads/datasheets/trenton_tsb7053_productdatasheet.pdf
>
>
>
>   I have come across a problem with RHEL 5.x family where I am getting
> the following output in dmesg:
>
> "usb 2-1.1: reset low speed USB device using ehci_hcd and address 3"
>
> My USB attached keyboard and mouse do not function properly (lag and
> inaccurate output).  It looks like there is an issue in the system support
> of USB but it only seems to exist in 5.x family.  Once tested in 6.x it all
> works.  (Testing with both CentOS and Scientific Linux - live and installed
> samples)
>
> I am going through the debug output manually but thought I'd shoot this
> over here for a more experienced perspective from those with grayer beards
> than I...
>
> TIA........Rich
>
>
> _______________________________________________
> Ale mailing list
> Ale at ale.org
> http://mail.ale.org/mailman/listinfo/ale
> See JOBS, ANNOUNCE and SCHOOLS lists at
> http://mail.ale.org/mailman/listinfo
>
>

-- 
-- 
James P. Kinney III
*
*Every time you stop a school, you will have to build a jail. What you gain
at one end you lose at the other. It's like feeding a dog on his own tail.
It won't fatten the dog.
- Speech 11/23/1900 Mark Twain
*
http://electjimkinney.org
http://heretothereideas.blogspot.com/
*
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mail.ale.org/pipermail/ale/attachments/20120618/6329e8dc/attachment.html 