From mboxrd@z Thu Jan 1 00:00:00 1970 From: Larry Finger Subject: Re: [Bug?] Machine hangs, rtl8192se possible cause Date: Mon, 01 Aug 2011 10:30:27 -0500 Message-ID: <4E36C693.6000705@lwfinger.net> References: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-wireless-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Jaroslaw Fedewicz Return-path: In-Reply-To: Sender: linux-wireless-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: netdev.vger.kernel.org On 08/01/2011 08:26 AM, Jaroslaw Fedewicz wrote: > Hello, > > I own a Thinkpad Edge 13 (AMD, machine type 0197) laptop, which is > shipped with a Realtek 8192 SE WLAN card. > > The WLAN support with this particular card was never brilliant under > Linux, first with (very) flakey drivers from Realtek which would stop > transmitting packets every so often or panic after a few hours of > usage. The in-tree drivers are better in this respect, but I'm > experiencing mysterious hangups every once in a while. The machine is > effectively dead and has to be power-cycled =E2=80=94 no oops, no ker= nel > panic, no nothing, it just hangs and that's it. > > I'm sure this is not a regression because the hangups were right ther= e > from the start. > > The last meaningful message which might be helpful was: "wait for > BIT(6) return value X" (I don't remember what X was, it was a while > ago and only once). > > I don't know if there are other means to debug (netconsole over eth0?= ) > those hangs. The only other thing I know for sure that I can get a > week long uptime if I blacklist rtl8192se.ko from loading. > > If I can provide any additional information to track the bug (or a > faulty piece of hardware?) down, please tell me. Google tells me > nobody reported this before, or it was just me feeding incorrect > keywords. > > Thanks for your kind attention. > > P. S. Tried netconsole before, got nothing to pinpoint the error. The > only recurring pattern I could see in it was that almost every time > the machine hanged was after ip6tables initialized, at least it was > the last message in the log. > > P. P. S. I don't track netdev@ and linux-wireless@ lists, so please C= c: me. What kernel are you using? The only problems I've had were some kernel = panics=20 due to improper handling of memory allocation failures with the receive= skb's,=20 but they have been fixed. It can be difficult to use netconsole to debug problems with wireless d= evices. As you prevent rtl8192se from loading automatically, the logging consol= e may=20 provide some clues. Use the following command to load the driver: sleep 10 ; modprobe rtl8192se During the 10 second sleep, use CTRL-ALT-F10 to switch consoles and see= if any=20 messages appear. Please use 'lspci -nn' to determine which version of the card you have. Thanks, Larry -- To unsubscribe from this list: send the line "unsubscribe linux-wireles= s" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html