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SubjectRecent wireless breakage (ipw2200, iwconfig, NetworkManager)
Recent kernels are having troubles with wireless for me. Two seemingly
related problems:

a) NetworkManager seems oblivious to the existence of my IPW2200
b) Manual iwconfig waits for 60s and then reports:

Error for wireless request "Set Encode" (8B2A) :
SET failed on device eth1 ; Operation not supported.

During this time, my keyboard in X is unresponsive, but everything
else seems to be functioning properly. Queued keypresses eventually
show up. Alt-sysrq-w gives:

ieee80211_crypt: registered algorithm 'WEP'
SysRq : Show Blocked State

free sibling
task PC stack pid father child younger older
events/0 D C0102D3C 0 4 1 5 3
(L-TLB)
c1d0bf1c 00000046 c1d0ac20 c0102d3c 00000000 c1d0aa70 00000022
0000000a
c1d0aa70 ca8ed618 00000034 00000cd3 c1d0ab7c 00000287 00000002
f581f040
00000002 c1d0bf34 00000246 f7b5cb04 c1d0aa70 c038224e c0102c3a
00000000
Call Trace:
[<c0102d3c>] __switch_to+0x11b/0x143
[<c038224e>] __mutex_lock_slowpath+0xfb/0x1e2
[<c0102c3a>] __switch_to+0x19/0x143
[<f994a291>] ipw_bg_link_down+0x19/0xbd [ipw2200]
[<f994a278>] ipw_bg_link_down+0x0/0xbd [ipw2200]
[<c0122604>] run_workqueue+0x97/0x156
[<c0122bc7>] worker_thread+0x105/0x12e
[<c0112399>] default_wake_function+0x0/0xc
[<c0122ac2>] worker_thread+0x0/0x12e
[<c01251f7>] kthread+0xa0/0xc9
[<c0125157>] kthread+0x0/0xc9
[<c0103f87>] kernel_thread_helper+0x7/0x10
=======================
ipw2200/0 D 00000020 0 1985 6 2260 1983
(L-TLB)
f7981f24 00000046 00000001 00000020 c1cdf8c0 00000000 00000000
0000000a
f7d09030 e1fdc8c3 00000034 0000093a f7d0913c 00000086 00000020
f7c4a740
00000086 f7981f3c 00000246 f7b5cb04 f7d09030 c038224e f7d09030
c0496550
Call Trace:
[<c038224e>] __mutex_lock_slowpath+0xfb/0x1e2
[<c0381233>] __sched_text_start+0x4b3/0x56b
[<f99445c6>] ipw_bg_gather_stats+0x0/0x27 [ipw2200]
[<f99445dd>] ipw_bg_gather_stats+0x17/0x27 [ipw2200]
[<c0122604>] run_workqueue+0x97/0x156
[<c0122bc7>] worker_thread+0x105/0x12e
[<c0112399>] default_wake_function+0x0/0xc
[<c0122ac2>] worker_thread+0x0/0x12e
[<c01251f7>] kthread+0xa0/0xc9
[<c0125157>] kthread+0x0/0xc9
[<c0103f87>] kernel_thread_helper+0x7/0x10
=======================
ieee80211_crypt_wep: could not allocate crypto API arc4
eth1: could not initialize WEP: load module ieee80211_crypt_wep
ADDRCONF(NETDEV_UP): eth1: link is not ready

A second attempt to enable WEP via iwconfig succeeds and network
connectivity is normal. However, NetworkManager still ignores the
device at this point.

Bisect with Mercurial points to this patch:

$ hg bisect bad
The first bad revision is:
changeset: 46985:f701b96bb2f7
user: Greg Kroah-Hartman <gregkh@suse.de>
date: Wed Feb 07 10:37:11 2007 -0800
summary: Network: convert network devices to use struct device
instead of class_device

which corresponds to 43cb76d91ee85f579a69d42bc8efc08bac560278 in git.

--
"Love the dolphins," she advised him. "Write by W.A.S.T.E.."

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