Re: Wireless problem with Thinkpad X220
On Thu, 11 Aug 2011 23:05:26 -0500, Kumar Appaiah writes:
> I've been trying to help a friend out with wireless on his Thinkpad
> X220. The identifier is:
>
> 03:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8188CE 802.11b/g/n WiFi Adapter (rev 01)
>
> Now, according to http://wiki.debian.org/rtl819x the drivers should
> work for the kernel (2.6.39 bpo.2). However, while wlan0 is displayed,
> he is unable to configure his network, and dmesg output says this:
>
> [ 2069.228798] rtl8192ce 0000:03:00.0: PCI INT A disabled
> [ 2085.887165] ieee80211_crypt: unregistered algorithm 'WEP'
> [ 2085.887174] ieee80211_crypt: unregistered algorithm 'CCMP'
> [ 2085.887181] ieee80211_crypt: unregistered algorithm 'TKIP'
> [ 2085.887187] ieee80211_crypt: unregistered algorithm 'NULL' (deinit)
> [ 2143.973876] ieee80211_crypt: registered algorithm 'NULL'
> [ 2143.973885] ieee80211_crypt: registered algorithm 'TKIP'
> [ 2143.973892] ieee80211_crypt: registered algorithm 'CCMP'
> [ 2143.973898] ieee80211_crypt: registered algorithm 'WEP'
> [ 2143.973921]
> [ 2143.973923] Linux kernel driver for RTL8192 based WLAN cards
> [ 2143.973929] Copyright (c) 2007-2008, Realsil Wlan
> [ 2326.698887] ieee80211_crypt: unregistered algorithm 'WEP'
> [ 2326.698897] ieee80211_crypt: unregistered algorithm 'CCMP'
> [ 2326.698904] ieee80211_crypt: unregistered algorithm 'TKIP'
> [ 2326.698910] ieee80211_crypt: unregistered algorithm 'NULL' (deinit)
> [ 2343.256604] rtl8192ce 0000:03:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
> [ 2343.256624] rtl8192ce 0000:03:00.0: setting latency timer to 64
> [ 2343.266633] ieee80211 phy1: Selected rate control algorithm 'rtl_rc'
> [ 2343.267260] rtlwifi: wireless switch is off
>
> In spite of having switched the WiFi on, Network Manager doesn't see anything.
>
> iwlist scanning gives:
> Failed to read scan data : Network is down
>
> Also, rfkill showed:
> 2: phy0: Wireless LAN
> Soft blocked: yes
> Hard blocked: no
>
> An rfkill unblock removed the soft block, but that still did nothing.
>
> I've run out of debugging ideas, and am looking for suggestions. Could
> you let me know how I should go about this?
1. Turn every service (wicd, network-manager, rf stuff, etc.) that is
associated with wifi off.
2. Does "iwlist wlan0 scan" still return nothing?
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