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Date: Mon, 14 May 2007 01:53:03 +0100 From: Alistair John Strachan <s0348365@....ed.ac.uk> To: Soeren Sonnenburg <kernel@....de> Cc: linux-usb-devel@...ts.sourceforge.net, Linux Kernel <linux-kernel@...r.kernel.org>, maxk@...lcomm.com Subject: Re: converting appletouch to usb autosuspend... On Monday 14 May 2007 01:46:10 Soeren Sonnenburg wrote: > On Sat, 2007-05-12 at 22:47 +0100, Alistair John Strachan wrote: > > On Saturday 12 May 2007 19:51:26 Soeren Sonnenburg wrote: > > > Dear all, > > [...] > > > > While we are at it usb related powerhogs on this macbook pro are > > > uhci_hcd (usb keyboard) and usb_hcd_poll_rh_status (rh_timer_func) > > > too... > > > > I've found that hci_usb also hogs power on the Macbook; blacklisting this > > module cuts down HZ considerably. I also found appletouch consumed ticks, > > I guess without loading appletouch ? Then there really is something in > there that needs to be fixed.. > > > just as you did. > > What did you use instead of hci_usb then ? usbkbd ? This won't give you > the special keys etc... Sorry, I wasn't clear. hci_usb is actually part of the BlueZ stack, it's got nothing to do with the keyboard. I unloaded both appletouch AND hci_usb. > > uhci_hcd then drops to noise; my Macbook's sitting on 10W with the > > backlight on minimum, which is about what it can manage in OS X on > > maximum life settings. > > Thats quite some improvement... Yes indeed. The only thing left to improve, as I understand it, is enabling the C4/C4e power states available on the Core 2 Duo, which don't currently seem to be utilised by Linux. I notice, however, that the screenshot on the Intel Powertop page does seem to have these states available? -- Cheers, Alistair. Final year Computer Science undergraduate. 1F2 55 South Clerk Street, Edinburgh, UK. - 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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