Re: [gentoo-user] Kernel-3.4.4 No USB Keyboard [Solved]

[Paul Hartman <paul.hartman+gentoo@gmail.com>]

On Sun, Jul 1, 2012 at 12:07 PM, Frank Peters <frank.peters@comcast.net> wrote:
> On Sun, 1 Jul 2012 12:39:07 -0400
> Frank Peters <frank.peters@comcast.net> wrote:
>
>>
>> After configuring with the same .config file that I used for 3.4.0,
>> the new 3.4.4 kernel boots but it cannot read the USB keyboard.
>> Presumably the USB mouse is also affected.
>>
>
> The problem has been traced to a certain configuration parameter.
>
> In the "General setup" options for kernel .config file, there
> is an option called "Configure standard kernel features (expert users)."
> There is also an associated admonition: "Only use this if you really
> know what you are doing."
>
> Since the help descriptions for these options are fairly easy to understand
> I decided to manually set some of these options.  For reasons that I
> can't understand this caused the USB problems.  Setting this option
> to "No" fixed everything and now the kernel-3.4.4 works nicely.
>
> It would be beneficial if anyone who truly is an "expert" could comment
> on how setting these options could wreck the USB system.

I am not an expert and don't know about your particular options that
were enabled/disabled, but on my laptop I had to ensure the USB
modules were loaded in a certain order. In my case my laptop supports
EHCI and UHCI, but I had to set EHCI as built-in and UHCI as module
(or I probably could have just blacklisted UHCI). Basically, if UHCI
got loaded first it would cause strangeness.