linux-kernel - Re: [ 12/75] USB: EHCI: work around silicon bug in Intels EHCI controllers

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Message-ID: <87620n9lsi.fsf@turtle.gmx.de>
Date:	Tue, 19 Mar 2013 21:28:29 +0100
From:	Sven Joachim <svenjoac@....de>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	<linux-kernel@...r.kernel.org>, <stable@...r.kernel.org>,
	Stephen Thirlwall <sdt@...com>
Subject: Re: [ 12/75] USB: EHCI: work around silicon bug in Intels EHCI controllers

On 2013-03-19 21:10 +0100, Alan Stern wrote:

> On Tue, 19 Mar 2013, Sven Joachim wrote:
>
>> > In what way is resume broken?
>> 
>> The kernel comes back, but the screen is black.  Manually switching VT's
>> is possible, and if I type something I can see it on the screen, but
>> there is no response and the cursor does not blink.  It looks as if the
>> VT is not switched backed on resume, and userspace tasks are not
>> restarted.  Sysrq combinations apparently work, but produce no output.
>
> Are there any other problems?  For example, even before you do a 
> suspend, if you type Alt-SysRq-W do you see any processes listed?

No.

> There was another report on the linux-usb mailing list today of this
> same patch causing the khubd task to hang.  I'm thinking that you might
> be facing a similar problem.

Maybe, but before the suspend everything seems to be normal.

Cheers,
       Sven
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