Messages in this thread | | | Date | Fri, 16 Jul 2010 12:02:23 +0100 | Subject | Re: [ibm-acpi-devel] [PATCH] Remove 9 second reboot delay on Lenovo T400/T500 | From | Pedro Ribeiro <> |
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On 16 July 2010 00:08, Matthew Garrett <mjg59@srcf.ucam.org> wrote: > On Thu, Jul 15, 2010 at 08:00:23PM -0300, Henrique de Moraes Holschuh wrote: > >> Do you want to escalate this to Lenovo? I need a clear and consise >> description of the problem and the boxes we know to be affected. > > Well, right now we're not doing precisely what Windows does. The other > possibility is that when the keyboard controller write triggers some SMM > code, it makes an assumption about some piece of hardware state that > isn't true and loops for a while to see if it changes. If we knew what > that was then we could ensure that we're performing the same state > change on our way down to reboot. > > One thing that would be worth checking is whether performing the > keyboard controller writes from userspace with a minimal kernel and > init=/bin/bash shows the 9-second pause or not - and then, ideally, see > whether the same is also true under DOS. > > -- > Matthew Garrett | mjg59@srcf.ucam.org >
I'm available to try and test whatever you want on my machine .
Regards, Pedro -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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