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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. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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