Kernel 2.6.10 and later issues with USB

[Matt Patterson]

Magnus Therning wrote:

>On Wed, Sep 07, 2005 at 01:25:00PM -0500, thephotoman wrote:
>  
>
>>Magnus Therning wrote:
>>    
>>
>>>On Wed, Sep 07, 2005 at 01:22:02AM -0500, thephotoman wrote:
>>>      
>>>
>>>>Cybe R. Wizard wrote:
>>>>        
>>>>
>>>>>On Tue, 06 Sep 2005 21:05:54 -0500
>>>>>thephotoman <rantman_2000 at yahoo.com> wrote:
>>>>>          
>>>>>
>>>>>>>That's the kernel I use, too.  Not using Gnome, though, I have to:
>>>>>>>sudo gnome-volume-manager  <password>
>>>>>>>in a terminal before plugging in my USB stuff and all is cool.
>>>>>>>Cybe R. Wizard
>>>>>>>              
>>>>>>>
>>>>>>Nope,  Problem not fixed.
>>>>>>            
>>>>>>
>>>>>You do have hal installed?  Cybe R. Wizard
>>>>>          
>>>>>
>>>>Yeah.  I do.
>>>>        
>>>>
>>>I've had problems with USB storage devices not showing up. The problem
>>>was that two host controllers where loaded. If 'lsmod|grep hcd' shows
>>>both uhci_hcd and ehci_hcd then try sticking one of them in a file in
>>>/etc/hotplug/blacklist.d/ (I chose to blacklist ehci_hcd). Hope it
>>>helps.
>>>/M
>>>      
>>>
>>Having some trouble blacklisting the services.  Could I get a pointer
>>on that?
>>    
>>
>
>I created the file /etc/hotplug/blacklist.d/local with the following
>content:
>
>  # uhci_hcd is the host of choice
>  ehci_hcd
>
>I don't think a restart of hotplug will do the trick, you'll have to
>reboot.
>
>If you feel a little adventurous you can always use rmmod to remove the
>module from a running kernel. I've heard that might cause problems even
>though I've never had any, YMMV.
>
>/M
>
>  
>
I just thought I should point out that uhci_hcd and ehci_hcd do not have 
the same purpose. uhci_hcd is for usb 1.1 devices (low and full speed). 
ehci_hcd is for usb 2.0 devices (hi speed devices). I will admit that 
the ehci_hcd has a LOT of bugs in it and its compatibility is less than 
stellar, so going back to the uhci_hcd will make things work better, 
just slower!!

Matt


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