lkml.org 
[lkml]   [2008]   [May]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [linux-pm] [PATCH 0/4] Fix forcedeth hibernate/wake-on-lan problems
On Sun, 1 Jun 2008, Tobias Diedrich wrote:

> Ok, after another long debugging session I finally found out the
> reason for the immediate reboot (after finding the place that
> suspends the serial console (drivers/pnp) and disabling that suspend
> path):
> The system is woken up by USB activity! (Optical mouse, anyone?)
>
> Lo and behold:
> drivers/usb/core/hcd-pci.c tries it's best to activate 'wake on
> usb', which I didn't know since it apparently also never worked.
> However, after applying the 'use platform_enable_wakeup'-patch,
> not only forcedeth wake starts working, also usb wake.
> If I prevent usb wake:
> |echo disabled > /sys/devices/pci0000\:00/0000\:00\:02.0/power/wakeup'
> |echo disabled > /sys/devices/pci0000\:00/0000\:00\:02.1/power/wakeup'
> And then hibernate in platform mode, the immediate reboot is gone
> and waking up using magic packets works fine even without setting up
> /proc/acpi/wakeup first.
>
> Maybe I should try hooking mouse and keyboard onto different usb
> host controllers, so I can disable wakeup for the mouse host
> controller and enable wakeup for the keyboard host controller,
> then it should be possible to wake the system by pressing a key. :)

You don't need to do that. Wakeup can be set specifically for each
individual USB device, provided CONFIG_USB_SUSPEND is enabled.


On Sun, 1 Jun 2008, Tobias Diedrich wrote:

> (BTW I first thought the 'immediate reboot because of usb wake' effect is
> caused by the optical mouse generating a wake event, but it rather
> seems to be a problem with a flaky secondary usb host controller,
> which sees a connected device where nothing is attached)

Can you provide debugging information (i.e., CONFIG_USB_DEBUG) with the
details on this bogus wakeup?

Alan Stern




\
 
 \ /
  Last update: 2008-06-01 04:55    [W:0.815 / U:0.728 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site