Re: 2.6.31.4: Intel P55 Chipset BUG [usbhid-raw/devices/broken?] [tested 3 different UPS']

[Justin Piszcz <jpiszcz@lucidpixels.com>]

On Sat, 31 Oct 2009, Arjan van de Ven wrote:

> On Sat, 31 Oct 2009 19:43:38 -0400 (EDT)
> Justin Piszcz <jpiszcz@lucidpixels.com> wrote:
>>>> Problem appears to be the Intel P55KG / USB Chipset in the way
>>>> that it handles usbhid-raw devices as CD/USB sticks/kbd/mouse/etc
>>>> do not appear to be affected.
>>>>
>>>> So far all other USB devices work fine, with the exception of
>>>> UPS', I have tested two APC 1500VA (one an RS the other an XS), in
>>>> addition I also have a 'BELKIN 1200VA UPS with AVR' from a long
>>>> time ago, the same problem occurs.
>>>
>>> ...
>>>
>>>> A bit frustrated, I popped in a PCI card with 4 external USBs, and
>>>> now no more errors:
>
>
> just as a wild guess;
> does it go away if you disable CONFIG_USB_SUSPEND ?
>
> also, google suggests that your bios may not have c-states enabled;
> if so, enabling those in the bios might also be a good idea

Hi Arjan,

Thanks for the reply,

http://home.comcast.net/~jpiszcz/20091101/config-2.6.31.4-7-PROD.txt
http://home.comcast.net/~jpiszcz/20091101/config-2.6.31.4-8-USB-DEBUG.txt

I do not use that option btw:

$ grep CONFIG_USB_SUSPEND .config
# CONFIG_USB_SUSPEND is not set

I rebooted to the BIOS and verified that the CPU C states are enabled.

Justin.