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From: Larry Finger <Larry.Finger@lwfinger.net>
To: Bjorn Helgaas <bhelgaas@google.com>
Cc: linux-pci@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>,
	李朝明 <chaoming_li@realsil.com.cn>
Subject: Question about failure in PCI power-state change
Date: Fri, 07 Sep 2012 17:44:57 -0500	[thread overview]
Message-ID: <504A78E9.4030005@lwfinger.net> (raw)

Hi,

On occasion when I unload and reload driver rtl8192ce, I get the message

"Refused to change power state, currently in D3"

I added additional info to the printk and discovered that it was trying to 
change to state D0. The problem seems to occur when I have made a connection, 
unloaded the driver, and reloaded it. If I do not make a connection before 
unloading, then the problem is a lot less likely.

This is with kernel 3.6-rc4 from wireless-testing. A Google search shows that 
the problem is usually due to suspend/resume difficulties, but this machine has 
not been suspended.

I would appreciate any help that you might give in solving this issue.

Thanks,

Larry

             reply	other threads:[~2012-09-07 22:45 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-09-07 22:44 Larry Finger [this message]
2012-09-07 22:48 ` Question about failure in PCI power-state change Bjorn Helgaas
2012-09-08 20:29   ` Rafael J. Wysocki
2012-09-08 21:50     ` Alan Stern
2012-09-08 22:01       ` Larry Finger
2012-09-10  0:24   ` Huang Ying
2012-09-10  3:56     ` Larry Finger

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