Return-path: <linux-wireless-owner@vger.kernel.org>
Received: from mail-we0-f174.google.com ([74.125.82.174]:38411 "EHLO
	mail-we0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S1757620Ab2IXTte (ORCPT
	<rfc822;linux-wireless@vger.kernel.org>);
	Mon, 24 Sep 2012 15:49:34 -0400
Received: by weyt9 with SMTP id t9so439777wey.19
        for <linux-wireless@vger.kernel.org>; Mon, 24 Sep 2012 12:49:33 -0700 (PDT)
MIME-Version: 1.0
Reply-To: kerolasa@gmail.com
Date: Mon, 24 Sep 2012 20:49:33 +0100
Message-ID: <CAG27Bk3tuw+P34btGic9pKwof3xsDw=dBpm-VEgv-RxN-BgVaQ@mail.gmail.com> (sfid-20120924_214938_605234_07EE08D7)
Subject: rtl8192ce, system freeze and bios reset
From: Sami Kerola <kerolasa@iki.fi>
To: Larry Finger <Larry.Finger@lwfinger.net>,
	Chaoming Li <chaoming_li@realsil.com.cn>,
	"John W. Linville" <linville@tuxdriver.com>
Cc: linux-wireless@vger.kernel.org
Content-Type: text/plain; charset=ISO-8859-1
Sender: linux-wireless-owner@vger.kernel.org
List-ID: <linux-wireless.vger.kernel.org>

FYI rtl8192ce maintainers (and maillist archive readers),

I recently bought Toshiba Satellite C850D-107 version PSC9SE-00T00DEN
which comes with Realtek hardware[1].

Initially I had a bit of problems with Arch Linux kernel 3.5.4-1-ARCH
which froze after running wpa_supplicant.  Once the command had been
entered it took about 5 to 10 seconds before real trouble, by which I
mean terminal did not echo keystrokes nor feel any way responsive.  I did
not try Magic SysRq's.

Strange enough that problem persisted over boot, and went away only if I
went to BIOS and set factory defaults.  Once factory defaults where set I
could use console again, as long I did not try to do anything with
wpa_supplicant command.  After wondering for while I found
instructions[2] how to go around; disable power saving, e.g., the set the
lines below.

$ cat /etc/modprobe.d/rtl8192ce.conf
options rtl8192ce ips=0 fwlps=0

That worked I became curious if the latest kernel would have the same
issue.  Now I am running 3.6.0-rc6-ARCH-00193-ge5e77cf from Linus's git
with new firmware[3], and power save enabled.  At least after an hour all
seems to work fine.

Did you anticipate firmware change to fix this these sort of problem?


[1] The hardware:
06:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8188CE
802.11b/g/n WiFi Adapter (rev 01)
	Subsystem: Realtek Semiconductor Co., Ltd. Device 8212
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 64 bytes
	Interrupt: pin A routed to IRQ 17
	Region 0: I/O ports at 3000 [size=256]
	Region 2: Memory at f0200000 (64-bit, non-prefetchable) [size=16K]
	Capabilities: <access denied>
	Kernel driver in use: rtl8192ce

[2] https://bbs.archlinux.org/viewtopic.php?id=132931

[3] md5sum /usr/lib/firmware/rtlwifi/rtl8192cfwU_B.bin
dd371739aa401ea1d615436b24598bc4 /usr/lib/firmware/rtlwifi/rtl8192cfwU_B.bin

-- 
   Sami Kerola
   http://www.iki.fi/kerolasa/