Message-ID: <4FB26D6B.2030005@lwfinger.net> (sfid-20120515_165132_454299_35913782)
Date: Tue, 15 May 2012 09:51:23 -0500
From: Larry Finger <Larry.Finger@lwfinger.net>
MIME-Version: 1.0
To: Anisse Astier <anisse@astier.eu>
CC: linux-wireless@vger.kernel.org
Subject: Re: rtl8192ce : freeze after connecting to network with FW Power
 Save on
References: <20120515152951.7cc4f84b@destiny.ordissimo>
In-Reply-To: <20120515152951.7cc4f84b@destiny.ordissimo>
Content-Type: text/plain; charset=UTF-8; format=flowed
Sender: linux-wireless-owner@vger.kernel.org

On 05/15/2012 08:29 AM, Anisse Astier wrote:
> Hi,
>
> With the rtl8192ce driver, I get freezes a few seconds after connecting
> to a network. (see PCI id below) Machine is unusable after hang. I'm
> using the linville/wireless-next git tree.
>
> I've been playing with the different options, and noticed that setting
> fwlps=0 fixes the issue.
>
> I've tried to get more messages with netconsole, but once the lockup
> happens I'm unable to get any debug message (regardless of the log level
> of the driver).
>
> Regards,
>
> Anisse
>
>
> 06:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8188CE 802.11b/g/n WiFi Adapter [10ec:8176] (rev 01)
> 	Subsystem: Realtek Semiconductor Co., Ltd. Device [10ec:8212]
> 	Flags: bus master, fast devsel, latency 0, IRQ 17
> 	I/O ports at 3000 [size=256]
> 	Memory at f0200000 (64-bit, non-prefetchable) [size=16K]
> 	Capabilities: [40] Power Management version 3
> 	Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+
> 	Capabilities: [70] Express Endpoint, MSI 00
> 	Capabilities: [100] Advanced Error Reporting
> 	Capabilities: [140] Virtual Channel
> 	Capabilities: [160] Device Serial Number 01-91-81-fe-ff-4c-e0-00
> 	Kernel driver in use: rtl8192ce

I have been doing long-term tests with that same card for about one week with no 
dropouts and no freezes. I am running wireless-testing, not wireless-next; 
however, I have all the rtlwifi and friends patches applied. I think it is safe 
to say that I cannot duplicate your results, and that we need to explore the 
rest of your system to see what is different.

Is your system 32- or 64-bit? How many cores in your CPU? Have you tried 
connecting to more than one AP? What is the make and model of the AP that needs 
to have power save turned off? What is the mode of operation?

I am using a 64-bit system with a dual-core CPU. My main AP is a Netgear 
WNDR3300 running standard firmware and is encrypted using WPA2-TKIP (AES). The 
mode is 802.11n at up to 270 Mbps; however, I have also tested using a Linksys 
WRT54GL running openWRT Kamakaze firmware. That one is 802.11g at up to 54 Mbps.

Larry