ЭстЪ ноут и DWL-2100AP . Периодически, причем тенденцию отследить пока не удалось, отваливается WiFi.
1. После этого NM пытается сам восстановить соединение и не может:

Sep 26 22:00:19 notebook-fc kernel: cfg80211: Calling CRDA to update world regulatory domain
Sep 26 22:00:19 notebook-fc kernel: cfg80211: Calling CRDA for country: UA
Sep 26 22:00:19 notebook-fc NetworkManager[1303]: <info> (wlan0): supplicant connection state: completed -> disconnected
Sep 26 22:00:19 notebook-fc kernel: cfg80211: Regulatory domain changed to country: UA
Sep 26 22:00:19 notebook-fc kernel: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
Sep 26 22:00:19 notebook-fc kernel: (2402000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm)
Sep 26 22:00:19 notebook-fc NetworkManager[1303]: <info> (wlan0): supplicant connection state: disconnected -> scanning
Sep 26 22:00:21 notebook-fc NetworkManager[1303]: <info> (wlan0): supplicant connection state: scanning -> associating
Sep 26 22:00:25 notebook-fc NetworkManager[1303]: <info> (wlan0): roamed from BSSID 00:26:5A:87:AD:69 (dlink_dwl_2100_ap) to (none) ((none))
Sep 26 22:00:35 notebook-fc NetworkManager[1303]: <info> (wlan0): device state change: 8 -> 3 (reason 11)
Sep 26 22:00:35 notebook-fc NetworkManager[1303]: <info> (wlan0): deactivating device (reason: 11).
Sep 26 22:00:35 notebook-fc NetworkManager[1303]: <info> (wlan0): canceled DHCP transaction, DHCP client pid 1531
Sep 26 22:00:35 notebook-fc avahi-daemon[1314]: Withdrawing address record for 192.168.1.34 on wlan0.
Sep 26 22:00:35 notebook-fc avahi-daemon[1314]: Leaving mDNS multicast group on interface wlan0.IPv4 with address 192.168.1.34.
Sep 26 22:00:35 notebook-fc avahi-daemon[1314]: Interface wlan0.IPv4 no longer relevant for mDNS.
Sep 26 22:00:35 notebook-fc NetworkManager[1303]: <info> Activation (wlan0) starting connection 'dlink_dwl_2100_ap'
Sep 26 22:00:35 notebook-fc NetworkManager[1303]: <info> (wlan0): device state change: 3 -> 4 (reason 0)
Sep 26 22:00:35 notebook-fc NetworkManager[1303]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) scheduled...
Sep 26 22:00:35 notebook-fc NetworkManager[1303]: <info> (wlan0): supplicant connection state: associating -> disconnected
Sep 26 22:00:35 notebook-fc NetworkManager[1303]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) started...
Sep 26 22:00:35 notebook-fc NetworkManager[1303]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) scheduled...
Sep 26 22:00:35 notebook-fc NetworkManager[1303]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) complete.
Sep 26 22:00:35 notebook-fc NetworkManager[1303]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) starting...
Sep 26 22:00:35 notebook-fc NetworkManager[1303]: <info> (wlan0): device state change: 4 -> 5 (reason 0)
Sep 26 22:00:35 notebook-fc NetworkManager[1303]: <info> Activation (wlan0/wireless): connection 'dlink_dwl_2100_ap' requires no security. No secrets needed.
Sep 26 22:00:35 notebook-fc NetworkManager[1303]: <info> Config: added 'ssid' value 'dlink_dwl_2100_ap'
Sep 26 22:00:35 notebook-fc NetworkManager[1303]: <info> Config: added 'scan_ssid' value '1'
Sep 26 22:00:35 notebook-fc NetworkManager[1303]: <info> Config: added 'key_mgmt' value 'NONE'
Sep 26 22:00:35 notebook-fc NetworkManager[1303]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) complete.
Sep 26 22:00:35 notebook-fc NetworkManager[1303]: <info> Config: set interface ap_scan to 1
Sep 26 22:00:35 notebook-fc NetworkManager[1303]: <info> (wlan0): supplicant connection state: disconnected -> scanning
Sep 26 22:00:36 notebook-fc NetworkManager[1303]: <info> (wlan0): supplicant connection state: scanning -> associating
Sep 26 22:00:56 notebook-fc NetworkManager[1303]: <info> (wlan0): supplicant connection state: associating -> disconnected
Sep 26 22:00:56 notebook-fc NetworkManager[1303]: <info> (wlan0): supplicant connection state: disconnected -> scanning
Sep 26 22:00:57 notebook-fc NetworkManager[1303]: <info> (wlan0): supplicant connection state: scanning -> associating
Sep 26 22:01:00 notebook-fc NetworkManager[1303]: <warn> Activation (wlan0/wireless): association took too long, failing activation.
Sep 26 22:01:00 notebook-fc NetworkManager[1303]: <info> (wlan0): device state change: 5 -> 9 (reason 11)
Sep 26 22:01:00 notebook-fc NetworkManager[1303]: <warn> Activation (wlan0) failed for access point (dlink_dwl_2100_ap)
Sep 26 22:01:00 notebook-fc NetworkManager[1303]: <info> Marking connection 'dlink_dwl_2100_ap' invalid.
Sep 26 22:01:00 notebook-fc NetworkManager[1303]: <warn> Activation (wlan0) failed.
Sep 26 22:01:00 notebook-fc NetworkManager[1303]: <info> (wlan0): device state change: 9 -> 3 (reason 0)
Sep 26 22:01:00 notebook-fc NetworkManager[1303]: <info> (wlan0): deactivating device (reason: 0).

2. Принудительно тоже ничего не получается:

Sep 26 22:06:43 notebook-fc NetworkManager[1303]: <info> Activation (wlan0) starting connection 'dlink_dwl_2100_ap'
Sep 26 22:06:43 notebook-fc NetworkManager[1303]: <info> (wlan0): device state change: 3 -> 4 (reason 0)
Sep 26 22:06:43 notebook-fc NetworkManager[1303]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) scheduled...
Sep 26 22:06:43 notebook-fc NetworkManager[1303]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) started...
Sep 26 22:06:43 notebook-fc NetworkManager[1303]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) scheduled...
Sep 26 22:06:43 notebook-fc NetworkManager[1303]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) complete.
Sep 26 22:06:43 notebook-fc NetworkManager[1303]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) starting...
Sep 26 22:06:43 notebook-fc NetworkManager[1303]: <info> (wlan0): device state change: 4 -> 5 (reason 0)
Sep 26 22:06:43 notebook-fc NetworkManager[1303]: <info> Activation (wlan0/wireless): connection 'dlink_dwl_2100_ap' requires no security. No secrets needed.
Sep 26 22:06:43 notebook-fc NetworkManager[1303]: <info> Config: added 'ssid' value 'dlink_dwl_2100_ap'
Sep 26 22:06:43 notebook-fc NetworkManager[1303]: <info> Config: added 'scan_ssid' value '1'
Sep 26 22:06:43 notebook-fc NetworkManager[1303]: <info> Config: added 'key_mgmt' value 'NONE'
Sep 26 22:06:43 notebook-fc NetworkManager[1303]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) complete.
Sep 26 22:06:43 notebook-fc NetworkManager[1303]: <info> Config: set interface ap_scan to 1
Sep 26 22:06:43 notebook-fc NetworkManager[1303]: <info> (wlan0): supplicant connection state: scanning -> disconnected
Sep 26 22:06:43 notebook-fc NetworkManager[1303]: <info> (wlan0): supplicant connection state: disconnected -> scanning
Sep 26 22:06:44 notebook-fc NetworkManager[1303]: <info> (wlan0): supplicant connection state: scanning -> associating
Sep 26 22:06:58 notebook-fc NetworkManager[1303]: <warn> (wlan0): link timed out.
Sep 26 22:07:04 notebook-fc NetworkManager[1303]: <info> (wlan0): supplicant connection state: associating -> disconnected
Sep 26 22:07:04 notebook-fc NetworkManager[1303]: <info> (wlan0): supplicant connection state: disconnected -> scanning
Sep 26 22:07:05 notebook-fc NetworkManager[1303]: <info> (wlan0): supplicant connection state: scanning -> associating
Sep 26 22:07:08 notebook-fc NetworkManager[1303]: <warn> Activation (wlan0/wireless): association took too long, failing activation.
Sep 26 22:07:08 notebook-fc NetworkManager[1303]: <info> (wlan0): device state change: 5 -> 9 (reason 11)
Sep 26 22:07:08 notebook-fc NetworkManager[1303]: <warn> Activation (wlan0) failed for access point (dlink_dwl_2100_ap)
Sep 26 22:07:08 notebook-fc NetworkManager[1303]: <info> Marking connection 'dlink_dwl_2100_ap' invalid.
Sep 26 22:07:08 notebook-fc NetworkManager[1303]: <warn> Activation (wlan0) failed.
Sep 26 22:07:08 notebook-fc NetworkManager[1303]: <info> (wlan0): device state change: 9 -> 3 (reason 0)
Sep 26 22:07:08 notebook-fc NetworkManager[1303]: <info> (wlan0): deactivating device (reason: 0).

3. Но!!! Если сказать
3.1. 3.2. Все сростается:

Sep 26 22:08:39 notebook-fc NetworkManager[1303]: <info> caught signal 15, shutting down normally.
Sep 26 22:08:39 notebook-fc NetworkManager[1303]: <info> (wlan0): now unmanaged
Sep 26 22:08:39 notebook-fc NetworkManager[1303]: <info> (wlan0): device state change: 3 -> 1 (reason 36)
Sep 26 22:08:39 notebook-fc NetworkManager[1303]: <info> (wlan0): cleaning up...
Sep 26 22:08:39 notebook-fc NetworkManager[1303]: <info> (wlan0): taking down device.
Sep 26 22:08:39 notebook-fc avahi-daemon[1314]: Withdrawing address record for fe80::721a:4ff:fed1:6bac on wlan0.
Sep 26 22:08:39 notebook-fc NetworkManager[1303]: <info> (eth0): now unmanaged
Sep 26 22:08:39 notebook-fc NetworkManager[1303]: <info> (eth0): device state change: 2 -> 1 (reason 36)
Sep 26 22:08:39 notebook-fc NetworkManager[1303]: <info> (eth0): cleaning up...
Sep 26 22:08:39 notebook-fc NetworkManager[1303]: <info> (eth0): taking down device.
Sep 26 22:08:39 notebook-fc NetworkManager[1303]: <info> (00:21:AA:F8:51:71): now unmanaged
Sep 26 22:08:39 notebook-fc NetworkManager[1303]: <info> (00:21:AA:F8:51:71): device state change: 3 -> 1 (reason 36)
Sep 26 22:08:39 notebook-fc NetworkManager[1303]: <info> (00:21:AA:F8:51:71): cleaning up...
Sep 26 22:08:39 notebook-fc NetworkManager[1303]: <info> (00:21:AA:F8:51:71): taking down device.
Sep 26 22:08:39 notebook-fc NetworkManager[1303]: <info> exiting (success)
Sep 26 22:08:39 notebook-fc NetworkManager[2790]: <info> NetworkManager (version 0.8.1-6.git20100831.fc13) is starting...
Sep 26 22:08:39 notebook-fc NetworkManager[2790]: <info> Read config file /etc/NetworkManager/NetworkManager.conf
Sep 26 22:08:39 notebook-fc NetworkManager[2790]: <info> VPN: loaded org.freedesktop.NetworkManager.pptp
Sep 26 22:08:39 notebook-fc NetworkManager[2790]: <info> VPN: loaded org.freedesktop.NetworkManager.openvpn
Sep 26 22:08:39 notebook-fc NetworkManager[2790]: <info> VPN: loaded org.freedesktop.NetworkManager.openconnect
Sep 26 22:08:39 notebook-fc NetworkManager[2790]: <info> VPN: loaded org.freedesktop.NetworkManager.vpnc
Sep 26 22:08:39 notebook-fc NetworkManager[2790]: <info> modem-manager is now available
Sep 26 22:08:39 notebook-fc NetworkManager[2790]: <info> monitoring kernel firmware directory '/lib/firmware'.
Sep 26 22:08:39 notebook-fc NetworkManager[2790]: ifcfg-rh: Acquired D-Bus service com.redhat.ifcfgrh1
Sep 26 22:08:39 notebook-fc NetworkManager[2790]: <info> Loaded plugin ifcfg-rh: (c) 2007 - 2008 Red Hat, Inc. To report bugs please use the NetworkManager mailing list.
Sep 26 22:08:39 notebook-fc NetworkManager[2790]: ifcfg-rh: parsing /etc/sysconfig/network-scripts/ifcfg-lo ...
Sep 26 22:08:39 notebook-fc NetworkManager[2790]: ifcfg-rh: parsing /etc/sysconfig/network-scripts/ifcfg-dlink_dwl_2100_ap ...
Sep 26 22:08:39 notebook-fc NetworkManager[2790]: ifcfg-rh: read connection 'dlink_dwl_2100_ap'
Sep 26 22:08:39 notebook-fc NetworkManager[2790]: ifcfg-rh: parsing /etc/sysconfig/network-scripts/ifcfg-eth0 ...
Sep 26 22:08:39 notebook-fc NetworkManager[2790]: ifcfg-rh: read connection 'System eth0'
Sep 26 22:08:39 notebook-fc NetworkManager[2790]: ifcfg-rh: parsing /etc/sysconfig/network-scripts/ifcfg-wlan0 ...
Sep 26 22:08:39 notebook-fc NetworkManager[2790]: ifcfg-rh: error: Missing SSID
Sep 26 22:08:39 notebook-fc NetworkManager[2790]: <info> found WiFi radio killswitch rfkill3 (at /sys/devices/pci0000:00/0000:00:1c.1/0000:04:00.0/ssb0:0/ieee80211/phy0/rfkill3) (driver <unknown>)
Sep 26 22:08:39 notebook-fc NetworkManager[2790]: <info> found WiFi radio killswitch rfkill1 (at /sys/devices/platform/dell-laptop/rfkill/rfkill1) (driver dell-laptop)
Sep 26 22:08:39 notebook-fc NetworkManager[2790]: <info> WiFi enabled by radio killswitch; enabled by state file
Sep 26 22:08:39 notebook-fc NetworkManager[2790]: <info> WWAN enabled by radio killswitch; enabled by state file
Sep 26 22:08:39 notebook-fc NetworkManager[2790]: <info> WiMAX enabled by radio killswitch; enabled by state file
Sep 26 22:08:39 notebook-fc NetworkManager[2790]: <info> Networking is enabled by state file
Sep 26 22:08:39 notebook-fc NetworkManager[2790]: <info> (wlan0): driver supports SSID scans (scan_capa 0x01).
Sep 26 22:08:39 notebook-fc NetworkManager[2790]: <info> (wlan0): new 802.11 WiFi device (driver: 'b43' ifindex: 3)
Sep 26 22:08:39 notebook-fc NetworkManager[2790]: <info> (wlan0): exported as /org/freedesktop/NetworkManager/Devices/0
Sep 26 22:08:39 notebook-fc NetworkManager[2790]: <info> (wlan0): now managed
Sep 26 22:08:39 notebook-fc NetworkManager[2790]: <info> (wlan0): device state change: 1 -> 2 (reason 2)
Sep 26 22:08:39 notebook-fc NetworkManager[2790]: <info> (wlan0): bringing up device.
Sep 26 22:08:39 notebook-fc kernel: b43-phy0: Loading firmware version 410.2160 (2007-05-26 15:32:10)
Sep 26 22:08:41 notebook-fc kernel: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Sep 26 22:08:41 notebook-fc NetworkManager[2790]: <info> (wlan0): preparing device.
Sep 26 22:08:41 notebook-fc NetworkManager[2790]: <info> (wlan0): deactivating device (reason: 2).
Sep 26 22:08:41 notebook-fc NetworkManager[2790]: <info> (eth0): carrier is OFF
Sep 26 22:08:41 notebook-fc NetworkManager[2790]: <info> (eth0): new Ethernet device (driver: 'tg3' ifindex: 2)
Sep 26 22:08:41 notebook-fc NetworkManager[2790]: <info> (eth0): exported as /org/freedesktop/NetworkManager/Devices/1
Sep 26 22:08:41 notebook-fc NetworkManager[2790]: <info> (eth0): now managed
Sep 26 22:08:41 notebook-fc NetworkManager[2790]: <info> (eth0): device state change: 1 -> 2 (reason 2)
Sep 26 22:08:41 notebook-fc NetworkManager[2790]: <info> (eth0): bringing up device.
Sep 26 22:08:41 notebook-fc NetworkManager[2790]: <info> (eth0): preparing device.
Sep 26 22:08:41 notebook-fc NetworkManager[2790]: <info> (eth0): deactivating device (reason: 2).
Sep 26 22:08:41 notebook-fc kernel: ADDRCONF(NETDEV_UP): eth0: link is not ready
Sep 26 22:08:41 notebook-fc NetworkManager[2790]: <warn> /sys/devices/virtual/net/pan0: couldn't determine device driver; ignoring...
Sep 26 22:08:41 notebook-fc NetworkManager[2790]: <info> (wlan0): supplicant interface state: starting -> ready
Sep 26 22:08:41 notebook-fc NetworkManager[2790]: <info> (wlan0): device state change: 2 -> 3 (reason 42)
Sep 26 22:08:41 notebook-fc NetworkManager[2790]: <warn> (00:21:AA:F8:51:71): failed to look up interface index
Sep 26 22:08:41 notebook-fc NetworkManager[2790]: <info> BT device my_phone а (00:21:AA:F8:51:71) added (DUN NAP)
Sep 26 22:08:41 notebook-fc NetworkManager[2790]: <info> (00:21:AA:F8:51:71): new Bluetooth device (driver: 'bluez' ifindex: -1)
Sep 26 22:08:41 notebook-fc NetworkManager[2790]: <info> (00:21:AA:F8:51:71): exported as /org/freedesktop/NetworkManager/Devices/2
Sep 26 22:08:41 notebook-fc NetworkManager[2790]: <info> (00:21:AA:F8:51:71): now managed
Sep 26 22:08:41 notebook-fc NetworkManager[2790]: <info> (00:21:AA:F8:51:71): device state change: 1 -> 2 (reason 2)
Sep 26 22:08:41 notebook-fc NetworkManager[2790]: <info> (00:21:AA:F8:51:71): deactivating device (reason: 2).
Sep 26 22:08:41 notebook-fc NetworkManager[2790]: <info> (00:21:AA:F8:51:71): device state change: 2 -> 3 (reason 0)
Sep 26 22:08:41 notebook-fc NetworkManager[2790]: <info> Activation (wlan0) starting connection 'dlink_dwl_2100_ap'
Sep 26 22:08:41 notebook-fc NetworkManager[2790]: <info> (wlan0): device state change: 3 -> 4 (reason 0)
Sep 26 22:08:41 notebook-fc NetworkManager[2790]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) scheduled...
Sep 26 22:08:41 notebook-fc NetworkManager[2790]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) started...
Sep 26 22:08:41 notebook-fc NetworkManager[2790]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) scheduled...
Sep 26 22:08:41 notebook-fc NetworkManager[2790]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) complete.
Sep 26 22:08:41 notebook-fc NetworkManager[2790]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) starting...
Sep 26 22:08:41 notebook-fc NetworkManager[2790]: <info> (wlan0): device state change: 4 -> 5 (reason 0)
Sep 26 22:08:41 notebook-fc NetworkManager[2790]: <info> Activation (wlan0/wireless): connection 'dlink_dwl_2100_ap' requires no security. No secrets needed.
Sep 26 22:08:41 notebook-fc NetworkManager[2790]: <info> Config: added 'ssid' value 'dlink_dwl_2100_ap'
Sep 26 22:08:41 notebook-fc NetworkManager[2790]: <info> Config: added 'scan_ssid' value '1'
Sep 26 22:08:41 notebook-fc NetworkManager[2790]: <info> Config: added 'key_mgmt' value 'NONE'

Один ньюанс: кроме DWL-2100AP NM видит еще, как правило, 2-3 WiFi точки доступа соседей. Причем одна из них - полностью открыта и даже находится в той же подсети. И, вот, если после п.1. в п.2. выбрать не свой DWL-2100AP, а ее: то NM - соединяется. А к своему родному DWL-2100AP - шиш. Только после выше озвученного рестарта. DWL-2100AP тоже открыт (правда указан MAC-адрес) + автоматическое определение частоты + DHCP.
Что делатЪ? Кто виноватЪ?
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"Helo, word!" - 17 errors 56 warnings

Нашел и, как и посоветовали, - заменил
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"Helo, word!" - 17 errors 56 warnings
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