On Wed, 26 Dec 2012 09:21:03 -0800, Frank Schäfer
<fschaefer.oss@xxxxxxxxxxxxxx> wrote:
Am 24.12.2012 20:23, schrieb Alan Stern:
On Fri, 21 Dec 2012, Frank Schäfer wrote:
Anyway, system still wakes up from S3 immediately.
It just occurred to me that not too long ago we learned about a BIOS
bug in ASUS systems that affects EHCI controllers during system suspend
(the workaround is commit dbf0e4c7257f8d684ec1a3c919853464293de66e; you
can look it up if you want). Perhaps the same bug affects OHCI
controllers too.
It can't hurt to try the test. Does the patch below make any
difference?
Thank you for the patch, but it makes no difference. :(
I looked for more instances of "linux immediate wakeup" and found
interesting links. They are regarding EHCI, but I wonder if
something similar could affect OHCI as well.
First, two threads in linux-pm from 2010:
http://lists.linux-foundation.org/pipermail/linux-pm/2010-April/025063.html
[PATCH] ehci: Disable wake on overcurrent (WKOC_E)
http://lists.linux-foundation.org/pipermail/linux-pm/2010-April/025064.html
[PATCH v2] [RFC] ehci: Disable wake on overcurrent (WKOC_E) and disconnect
(WKDISC_E)
Do you think this may affect OHCI too in some similar way?
---------------
Then, three links, apparently regarding EHCI about the usage of +5VSB
instead of the +5V line for powering the USB controller.
Could the experiment with switching the +5V and +5VSB lines be relevant as
well for OCHI?
http://www.gossamer-threads.com/lists/mythtv/users/316830
ASUS M2NPV-VM
I figured out that you have to enable the +5VSB jumper on all the
USB hubs that have devices connected to them, even if you're not going
to use them to wake up the box! In other words, turn them ALL on, not
just the one where the wake-up device is connected. Don't worry about
joysticks waking up your machine randomly, because they won't;
apparently only devices with power buttons can do so.
---------------
https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.22/+bug/128315
Suspend started working after changing the USB from +5V to +5VSB. I do
get a message about half the times that 1 application refused to freeze:
Plasma. After the suspend attempt, I have to kill plasma and restart it.
If I try suspending again it works most of the time. But this seems like
an unrelated bug.
---------------
http://www.gossamer-threads.com/lists/mythtv/users/309798
Additionally, you need to have the motherboard jumper for USB host
controller set so that it gets power during S3.
--
Octavio.
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