Error messages "over-current change on port 1"

[Matthew East]

I see several messages like this in my syslog, and these messages appear when resuming from suspend to RAM:

May 1 00:52:42 localhost kernel: [4614185.651000] Restarting tasks...<3>hub 2-0:1.0: over-current change on port 1

[Tormod Volden (tormodvolden)]

Yes, please tell us exactly what these ugly messages are.

[Matthew East (mdke)]

On Tue, 2006-04-25 at 21:16 +0000, Tormod Volden wrote:
> Yes, please tell us exactly what these ugly messages are.

Ok, I found them in my log:

Apr 25 19:05:16 localhost kernel: [4373507.446000] Restarting
tasks...<3>hub 2-0:1.0: over-current change on port 1
Apr 25 19:05:16 localhost kernel: [4373507.651000] hub 2-0:1.0:
over-current change on port 2

 status unconfirmed
--
<email address hidden>
gnupg pub 1024D/0E6B06FF

[Matthew East (mdke)]

Reassigning to the kernel, as from the syslog these messages are coming from the kernel.

[Fabio Massimo Di Nitto (fabbione)]

This isn't a bug. That error is spawned by the hardware and defined in the USB specs. The kernel only catches it and report it to user land as specs say it should happen.

[Paul Sladen (sladen)]

These are required by the USB specification:

  <fabbione> if you didn't get it before is because the kernel was not 100% compliant to the specs

[Liken Otsoa (liken)]

Some problem here , with Hardy Uptodate and IBM thinkpad X41 Tablet.

[Leann Ogasawara (leannogasawara)]

The Ubuntu Kernel Team is planning to move to the 2.6.27 kernel for the upcoming Intrepid Ibex 8.10 release. As a result, the kernel team would appreciate it if you could please test this newer 2.6.27 Ubuntu kernel. There are one of two ways you should be able to test:

1) If you are comfortable installing packages on your own, the linux-image-2.6.27-* package is currently available for you to install and test.

--or--

2) The upcoming Alpha5 for Intrepid Ibex 8.10 will contain this newer 2.6.27 Ubuntu kernel. Alpha5 is set to be released Thursday Sept 4. Please watch http://www.ubuntu.com/testing for Alpha5 to be announced. You should then be able to test via a LiveCD.

Please let us know immediately if this newer 2.6.27 kernel resolves the bug reported here or if the issue remains. More importantly, please open a new bug report for each new bug/regression introduced by the 2.6.27 kernel and tag the bug report with 'linux-2.6.27'. Also, please specifically note if the issue does or does not appear in the 2.6.26 kernel. Thanks again, we really appreicate your help and feedback.

[Matthew East (mdke)]

I haven't been able to test Ubuntu on my laptop for some time, but I can now confirm that with the latest intrepid I no longer see these messages on resuming from suspend. That means the bug is fixed, because as per Fabio's explanation below, having the messages in syslog is not a problem, it was the fact that they were plastered all over the screen during resume that was the bug.

[Gennaro Bellizio (genbell)]

I have the same problem on my laptop since Feisty and no usb device worked. After some investigation I blacklisted snd-hda-intel module. Now usb storage devices work but my usb printer still does not work. When I plug the printer I see a lot of over-current change messages and all usb devices plugged are deactivated. I don't think that the problem is due to the printer because when I plug it to other computers work correctly. I have no other usb devices to do other tests.