Re: ehci_hcd related S3 lockup on ASUS laptops, again

[Steven Rostedt <rostedt@xxxxxxxxxxx>]

On Wed, 2012-04-11 at 22:55 +0600, Andrey Rahmatullin wrote:
> On many ASUS laptops and probably on some non-ASUS ones you need to unload
> ehci_hcd or unbind both USB controllers from it before entering S3, else
> the system will lockup. Here are some links:
> 
> http://thread.gmane.org/gmane.linux.kernel/1222803
> https://bugzilla.kernel.org/show_bug.cgi?id=37632
> http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=658778
> http://ubuntuforums.org/showthread.php?t=1444822
> 
> This still happens on my K53E on v3.4-rc2-16-ga9e1e53.
> 
> Unbinding just one of two controllers doesn't help.
> 
> Disabling /sys/bus/pci/devices/0000:00:1[ad].0/power/wakeup doesn't help.
> echo mem>/sys/power/state doesn't hang with 'core' in /sys/power/pm_test,
> only with 'none'.
> 
> Windows 7 enters S3 perfectly well.
> 
> I didn't see any other suggestions how to debug this. I can provide any
> debug data if that will help. This seems to be a very important problem
> for owners of certain devices.
> 

Yeah, I never got a real fix. I'm still using the script that removes
the driver and adds it back during the suspend/resume sequence. That
seems to be a working work-around for me.

That said, I would love to have this fixed for real. Not just for me,
but for anyone else that is suffering from the same issue. I'm a kernel
developer and can easily include work arounds like this. But for anyone
else, this is a total fail for Linux in general.

I'm willing to test fixes, as the issue still exists for my laptop if I
remove the script.

-- Steve


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