linux-kernel - Re: [opensuse-factory] Re: usb midi keyboard broken [3.3.3 regression] [SOLUTION]

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Message-Id: <201204281730.04550.oliver@neukum.org>
Date:	Sat, 28 Apr 2012 17:30:04 +0200
From:	Oliver Neukum <oliver@...kum.org>
To:	Steffen Müller <steffen.mueller@...io-frei.de>
Cc:	opensuse-factory@...nsuse.org,
	Alan Stern <stern@...land.harvard.edu>,
	Jiri Slaby <jslaby@...e.cz>, stable@...nel.org,
	Greg KH <greg@...ah.com>, USB list <linux-usb@...r.kernel.org>,
	Linux kernel mailing list <linux-kernel@...r.kernel.org>
Subject: Re: [opensuse-factory] Re: usb midi keyboard broken [3.3.3 regression] [SOLUTION]

Am Samstag, 28. April 2012, 13:45:56 schrieb Steffen Müller:
> Oh man! After look and try many usr relevant settings I found the malfactor: 
> tlp usb autosuspend settings.
> 
> I use tlp (energy-saving tools for thinkpad laptops) and they autosuspend usb 
> devices by default. Now I have blacklisted my midi keyboard an all is good. I 
> can reproduce the problem this way. Seems so that the midi keyboard doesn't 
> wake up if it once sleeping.
> 
> For all with similar problems: 
> edit /etc/default/tlp and set USB_BLACKLIST="<device id from usbls>" or 
> disable usb autosuspend entirely with USB_AUTOSUSPEND=0
> 
> thanks and sorry for the bother.

No problem, but we ought to test whether we can make it work with a kernel
quirk. Can you please test whether it works with USB_QUIRK_RESET_RESUME
in drivers/usb/core/quirks.c ?

	Regards
		Oliver
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