Tenho o Ubuntu 14.04 em execução no Dell Precision M3800. Eu preciso usar duas placas wifi nesta máquina (longa história) e tive o Intel 7260 interno trabalhando ao lado de um Netgear..algo (chipset rtl8187) .. por algum tempo sem problemas.
Eu decidi substituir o Netgear por um AWUS036H porque ele usa o mesmo chipset e suporta uma antena auxiliar.
No entanto, ao conectar o AWUS036H, vejo isso no meu syslog:
NetworkManager[1226]: <info> (wlan3): bringing up device.
ModemManager[932]: <warn> Couldn't find support for device at '/sys/devices/pci0000:00/0000:00:14.0/usb3/3-4': not supported by any plugin
NetworkManager[1226]: <info> (wlan3): preparing device.
NetworkManager[1226]: <info> (wlan3): deactivating device (reason 'managed') [2]
kernel: [ 72.933533] IPv6: ADDRCONF(NETDEV_UP): wlan3: link is not ready
wpa_supplicant[1411]: wlan0: CTRL-EVENT-SCAN-STARTED
NetworkManager[1226]: <info> (wlan3) supports 4 scan SSIDs
NetworkManager[1226]: <info> (wlan3): supplicant interface state: starting -> ready
NetworkManager[1226]: <info> (wlan3): device state change: unavailable -> disconnected (reason 'supplicant-available') [20 30 42]
NetworkManager[1226]: <warn> Trying to remove a non-existant call id.
NetworkManager[1226]: <info> (wlan3): supplicant interface state: ready -> disconnected
NetworkManager[1226]: <info> (wlan3) supports 4 scan SSIDs
wpa_supplicant[1411]: wlan3: Reject scan trigger since one is already pending
wpa_supplicant[1411]: wlan3: CTRL-EVENT-SCAN-STARTED
kernel: [ 73.088767] usb 3-4: USB disconnect, device number 31
NetworkManager[1226]: SCPlugin-Ifupdown: devices removed (path: /sys/devices/pci0000:00/0000:00:14.0/usb3/3-4/3-4:1.0/net/wlan3, iface: wlan3)
NetworkManager[1226]: <info> (wlan3): device state change: disconnected -> unmanaged (reason 'removed') [30 10 36]
NetworkManager[1226]: <info> (wlan3): cleaning up...
NetworkManager[1226]: <warn> (25) failed to find interface name for index
NetworkManager[1226]: (nm-system.c:766):nm_system_iface_get_flags: runtime check failed: (iface != NULL)
NetworkManager[1226]: <error> [1416857019.131304] [nm-system.c:768] nm_system_iface_get_flags(): (unknown): failed to get interface link object
NetworkManager[1226]: <info> radio killswitch /sys/devices/pci0000:00/0000:00:14.0/usb3/3-4/3-4:1.0/ieee80211/phy22/rfkill24 disappeared
kernel: [ 73.664842] usb 3-4: new high-speed USB device number 32 using xhci_hcd
kernel: [ 73.799603] usb 3-4: New USB device found, idVendor=0bda, idProduct=8187
kernel: [ 73.799607] usb 3-4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
kernel: [ 73.799609] usb 3-4: Product: RTL8187_Wireless
kernel: [ 73.799610] usb 3-4: Manufacturer: Manufacturer_Realtek_RTL8187_
kernel: [ 73.799612] usb 3-4: SerialNumber: 00B0CA945E30
kernel: [ 73.932414] ieee80211 phy23: Selected rate control algorithm 'minstrel_ht'
kernel: [ 73.932579] ieee80211 phy23: hwaddr 00:b0:ca:94:5e:30, RTL8187vB (default) V1 + rtl8225z2, rfkill mask 2
mtp-probe: checking bus 3, device 32: "/sys/devices/pci0000:00/0000:00:14.0/usb3/3-4"
mtp-probe: bus: 3, device: 32 was not an MTP device
kernel: [ 73.942221] rtl8187: Customer ID is 0xFF
kernel: [ 73.942569] rtl8187: wireless switch is on
NetworkManager[1226]: <info> rfkill25: found WiFi radio killswitch (at /sys/devices/pci0000:00/0000:00:14.0/usb3/3-4/3-4:1.0/ieee80211/phy23/rfkill25) (driver rtl8187)
NetworkManager[1226]: SCPlugin-Ifupdown: devices added (path: /sys/devices/pci0000:00/0000:00:14.0/usb3/3-4/3-4:1.0/net/wlan3, iface: wlan3)
NetworkManager[1226]: SCPlugin-Ifupdown: device added (path: /sys/devices/pci0000:00/0000:00:14.0/usb3/3-4/3-4:1.0/net/wlan3, iface: wlan3): no ifupdown configuration found.
kernel: [ 73.965038] systemd-udevd[1528]: renamed network interface wlan1 to wlan3
NetworkManager[1226]: <info> (wlan3): using nl80211 for WiFi device control
NetworkManager[1226]: <info> (wlan3): new 802.11 WiFi device (driver: 'rtl8187' ifindex: 26)
NetworkManager[1226]: <info> (wlan3): exported as /org/freedesktop/NetworkManager/Devices/24
NetworkManager[1226]: <info> (wlan3): device state change: unmanaged -> unavailable (reason 'managed') [10 20 2]
NetworkManager[1226]: <info> (wlan3): bringing up device.
Isso faz um loop indefinidamente e o dispositivo nunca se torna utilizável.
Eu removi completamente o Network Manager, isso não ajudou. Eu removi os 7260 drivers e os coloquei na blacklist, e isso não ajudou. Eu liguei a outra caixa 14.04, onde nenhuma outra placa wireless está presente, e funciona.
Aqui está a saída do lshw (se eu der o tempo certo, eu posso pegar o AWUS, mas ele é listado apenas por alguns momentos antes de desaparecer):
*-network
description: Wireless interface
product: Wireless 7260
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:06:00.0
logical name: wlan0
version: 6b
serial: e8:2a:ea:43:ef:d8
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=3.15.0-031500-generic firmware=23.214.9.0 latency=0 link=no multicast=yes wireless=IEEE 802.11abgn
resources: irq:54 memory:f7900000-f7901fff
*-network:1
description: Wireless interface
physical id: 3
bus info: usb@3:4
logical name: wlan3
serial: 00:b0:ca:94:5e:30
capabilities: ethernet physical wireless
configuration: broadcast=yes driver=rtl8187 driverversion=3.15.0-031500-generic firmware=N/A link=no multicast=yes wireless=IEEE 802.11bg
lsmod:
rtl8187 65286 0
mac80211 663788 2 rtl8187,iwlmvm
cfg80211 514187 4 iwlwifi,mac80211,rtl8187,iwlmvm
eeprom_93cx6 13344 1 rtl8187
iwlwifi 185872 1 iwlmvm
Alguma ideia? Eu estou meio perdido aqui, especialmente porque outro cartão que usa rtl8187 funciona bem neste laptop.
Obrigado!