[ltp] Recently identified ThinkPad mysteriouses

[Jan Gutter]

On Thu, 2007-11-22 at 15:20 +0100, Thomas Renninger wrote:
> Hi Henrique,
> 
> I'd like to point you to some things I found out on ThinkPads the last
> weeks:
>  - Weird USB - EHCI IRQ problems on very latest Lenovo models
> 
>    Unhandled IRQ messages. Looks like an IRQ (from camera?) gets routed
>    to EHCI pin also? Don't know the details and I am also not very
>    familar with this..., Oliver might be able to point you to bug
>    reports, AFAIK there also exist kernel.org bugs.
Yes, I've logged this kernel bug: 

http://bugzilla.kernel.org/show_bug.cgi?id=8853

It's very annoying: it seems to be that the built-in *bluetooth* dongle
generates bogus interrupts on the same pin (at around 100-200 per
second) on various models (including mine). Depending on what else is
connected to that pin, the kernel shuts them all down. The workaround
currently is either to completely ignore those interrupts, or to disable
bluetooth. If this extends to other devices, it might point to a USB
chipset error, rather than the built-in bluetooth (or misrouted tracks)
being at fault.

Response from Lenovo would be awesome!

>    Attaching an USB device breaks USB and throws a calltrace
>    https://bugzilla.novell.com/show_bug.cgi?id=325601
> 
>    As this seem to be a very (recent Lenovo) ThinkPad specific problem
>    -> Only happens on latest ThinkPads, but back to at least
>    kernel 2.6.16 until latest mainline... I hope to get some
>    feedback from Lenovo ThinkPad users also seeing this.

This *looks* to me like exactly the same problem. I don't use SuSE, so
someone might want to unify or correlate these bugs?

-- Jan