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Date: Sun, 1 Nov 2009 03:55:53 -0500 (EST)
From: Justin Piszcz <jpiszcz@...idpixels.com>
To: Arjan van de Ven <arjan@...radead.org>
cc: Alan Stern <stern@...land.harvard.edu>,
linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
nut-upsuser@...ts.alioth.debian.org, bruce.w.allan@...el.com,
Alan Piszcz <ap@...arrain.com>
Subject: Re: 2.6.31.4: Intel P55 Chipset BUG [usbhid-raw/devices/broken?]
[tested 3 different UPS']
On Sat, 31 Oct 2009, Arjan van de Ven wrote:
> On Sat, 31 Oct 2009 19:43:38 -0400 (EDT)
> Justin Piszcz <jpiszcz@...idpixels.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.
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