Author Topic: Snap April 13 28939 ehci_hcd errors - Kinda  (Read 211 times)

pigdog

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Snap April 13 28939 ehci_hcd errors - Kinda
« on: April 15, 2014, 09:26:37 pm »
Hi,

On this snap (could have been earlier as well) I received a...

 /sys/bus/pci/drivers/ehci_hcd

...error on usb 3-4 at boot up with lots of usb 3-4: device descriptor read/64 and device not accepting address XX messages .

So I ...

cd /sys/bus/pci/drivers/ehci_hcd

and did ...

ls -l

In my case this displayed two files with 0000:00:XX.X names.

I entered the command...

echo -n "0000:00:XX.X" > unbind

for both files and this slowed the messages down quite a bit.  At least it made it easier to enter command prompt entries without having everything overwritten by the terminal output messages.

This had to be re-entered every time I rebooted.

So I put the commands into /etc/rc.local and rebooted.

echo -n "0000:00:XX.X" > unbind /sys/bus/pci/drivers/ehci_hcd

They don't come up as nearly often but they still annoy during troubleshooting.

I don't understand why they still pop up - period, but it's way less annoying than before.

Cheers

« Last Edit: April 16, 2014, 11:17:38 pm by pigdog »

pigdog

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Re: Snap April 13 28939 ehci_hcd errors
« Reply #1 on: April 16, 2014, 04:14:07 pm »
Hi,

I ended up adding...

dmesg -n 1

to /etc/rc.local

This stopped the intermittent terminal messages but it also stops any kernel generated error messages.

pigdog

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Re: Snap April 13 28939 ehci_hcd errors
« Reply #2 on: April 16, 2014, 10:26:56 pm »
Hi,

I reloaded from scratch and no more error messages.

I went into KDE Desktop and put a USB stick into a port and received...

An error occurred while accessing 'USBNAME', the system responded:
An unexpected error has occurred. : Not Authorized

I have not seen any error messages on the terminal.

I will play with this when I get spare time to see if it can be reproduced and to find out why I'm not authorized.

Cheers