"Unable to enumerate USB device"

Akaihiryuu · l33t Joined: 08 May 2003 Posts: 798 Location: Columbus, OH

Ok, sometime in the past 6 months, USB keyboards stopped working on my Gentoo server. Other USB devices (like flash drives) work fine:

eccerr0r · Posted: Sun Jan 29, 2012 12:09 am Post subject:

You mention "usb keyboards" indicating more than one fail?

The error you got usually indicates bad USB hardware. If you have more than one that doesn't work yet USB-storage works on that same port, makes no sense...
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energyman76b · Advocate Joined: 26 Mar 2003 Posts: 2048 Location: Germany

and you have of course hid support turned on under usb support?
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Logicien · Posted: Sun Jan 29, 2012 12:57 am Post subject:

Hello,
I got that message with a USB cellular modem that include a cdrom image when I use it with a usb cacle. The BIOS do not recognise the cdrom and Linux tell me "Unable to enumerate USB device" at early boot. But when I log in, it work. If I plug it directly in the USB connector, the BIOS see it and I do not see this message. When I use the USB cellular modem with a USB hub, BIOS see cdrom and no error message.

So, I think it is because I bought the USB cable et a one dollar (1$) store and it is cheap. I did not check with an other cable. An other device that can give the message "Unable to enumerate USB device" from Linux at boot time is my USB mouse. It work to in session.

It look like as if Linux need to drive some devices itself to be able to enumarate them. It can not do it from a BIOS call it the BIOS can not enumerate those devices itself. Probably put the USB support in hard in the kernel would resolv the problem.
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energyman76b · Advocate Joined: 26 Mar 2003 Posts: 2048 Location: Germany

do yourself a favour and do not compile in usb support. Keep ehci, uhci, ohci, xhci modular. Sometimes some device will fuck your bus up. No problem, rmmod && modprobe and everything works again. But compiled in....

Failure to 'enumerate' is either hardware or driver.

Those umts sticks with their fake-cdrom are a different problem, solved by the right udev rule.
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I identify as a dirty penismensch.

Logicien · Posted: Sun Jan 29, 2012 1:25 am Post subject:

So, why sometimes the enumarate message show and somtimes not depending on material setup, without changing Udev rules?
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Paul

energyman76b · Advocate Joined: 26 Mar 2003 Posts: 2048 Location: Germany

Akaihiryuu · l33t Joined: 08 May 2003 Posts: 798 Location: Columbus, OH

Sorry, I missed the replies to this because I forgot to check the notification box. But to answer the question, NO USB keyboard will work on that machine. I have tried 3 of them (all of which used to work), all give this error. This started after the OpenRC migration.

I have tested all 3 keyboards...all work fine on my gaming computer (which has Win7...they also work fine in the BIOS though). Any other USB device works fine on the Linux server, just not a keyboard. I do have USB HID support (it's a module, and so are my other USB options).