[ltp] T40 and USB 2.0

[Joel Ebel]

You might want to check if it works in windows, or perhaps under knoppix 
or some other easy to boot OS.  It should just work.  If it doesn't, you 
might have a fried USB2 controller.  That happened to me, and IBM 
replaced the mainboard.  It doesn't seem to be too uncommon 
unfortunately.  Others have had USB go bad as well.  Some had USB stop 
working entirely, some, like myself and perhaps you, just lost USB2.

Joel

Jason LeBrun wrote:
> On Wed, Apr 27, 2005 at 06:02:46PM -0700, Jason LeBrun wrote:
> 
>>>I'm having no luck getting a USB 2.0 drive to enumerate on my T40 (under 
>>>2.6.11-ac1). Has anyone had any success with the ehci_hcd driver on a T40? 
>>>if so, I'd like to hear about it!
> 
> 
>>A bit more details would be nice.
>>Is the drive working with USB 1?
>>which modules are loaded?
>>what happens in /var/log/kern.log when you plug the drive in?
> 
> 
>>Sometimes it takes several minutes for the drive to initialize. So:
>>tail -f /var/log/kern.log
>>plug in
>>wait a few minutes.
> 
> 
>>Michael
> 
> 
> Thanks for the response,
> 
> I posted a message earlier with more details, and got no response, so in my 
> second attempt, I'm just trying to find someone in particular who's 
> successfully gotten USB 2.0 working on a T40.
> 
> Some info:
> 
> The drive does work with USB 1 (uhci_hcd)
> The drive does not work with ehci_hcd loaded. (Whether ehci_hcd is loaded or 
> not)
> I've already disabled CONFIG_BLK_DEV_UB
> I tried disabling ACPI
> I've fiddled around with IRQ settings in BIOS, but nothing changes. 
> Using 2.6.11-ac1 (also tried gentoo-sources 2.6.8, 2.6.11)
> 
> I've already checked dmesg, and the result is a constant loop of the 
> same attempts at enumeration, accompanied by a blinking of the activity light 
> on the drive, at about 3 Hz. The drive will not initialize because it's not 
> even enumerating. The messages are posted in an earlier message from me, so I 
> won't post them again, so if anyone would like to see them, you can refer to 
> that message.
> 
> The non-verbose debug messages just show "device not accepting address" over 
> and over again. The kernel is receiving interrupts, so that's not the 
> problem. 
> 
> I've tried most of the common solutions that can be found on Google, and they 
> haven't worked, so I think the problem is machine specific... hopefully not 
> my machine in particular! This is why I'm looking for someone with a T40, in 
> particular.
> 
> Last time I checked, USB 2.0 worked under windows, but I haven't had windows 
> installed on this thing in months, now.
> 
> Jason
> 
> 
> 
>