Беспроводное устройство включено, но никакой список сетей не показывают
Беспроводное устройство показывают, и оно включено на Администраторе сети, но никакие сети не отображены.
Это часто происходит и без видимой причины.
Когда я выключаю компьютер, отключаю силовой кабель, количество к десять, повторно подключаю силовой кабель и включаю компьютер снова, список беспроводной сети становится доступным снова. Если я не разъединяю силовой кабель, это обходное решение не работает.
Это часто происходило только что. Моя машина не имеет сочетания клавиш для включения / отключают беспроводную сеть, у меня еще не было "обходного решения" силового кабеля разъединения, таким образом, решением был перезапуск к Windows (двойная загрузка), включите беспроводную сеть на панели управления и назад к Ubuntu.
Как у меня может быть своя беспроводная сеть, работающая снова ни с одним из этого странные обходные решения?
########## wireless info START ##########
Report from: 01 Oct 2015 15:33 BRT -0300
Booted last: 01 Oct 2015 12:39 BRT -0300
Script from: 27 Sep 2015 00:34 UTC +0000
##### release ###########################
Distributor ID: Ubuntu
Description: Ubuntu 15.04
Release: 15.04
Codename: vivid
##### kernel ############################
Linux 3.19.0-30-generic #33-Ubuntu SMP Mon Sep 21 20:58:04 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
Parameters: ro, quiet, splash, nomdmonddf, nomdmonisw
##### desktop ###########################
Ubuntu
##### lspci #############################
03:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8723AE PCIe Wireless Network Adapter [10ec:8723]
Subsystem: Realtek Semiconductor Co., Ltd. Device [10ec:0726]
Kernel driver in use: rtl8723ae
04:00.2 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 0a)
Subsystem: CLEVO/KAPOK Computer Device [1558:3537]
Kernel driver in use: r8169
##### lsusb #############################
Bus 004 Device 002: ID 8087:8000 Intel Corp.
Bus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 002: ID 8087:8008 Intel Corp.
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 0bda:8723 Realtek Semiconductor Corp.
Bus 001 Device 006: ID 22b8:2e62 Motorola PCS
Bus 001 Device 002: ID 1a81:1004 Holtek Semiconductor, Inc.
Bus 001 Device 005: ID 147e:1002 Upek Biometric Touchchip/Touchstrip Fingerprint Sensor
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
##### PCMCIA card info ##################
##### rfkill ############################
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
##### lsmod #############################
mxm_wmi 16384 0
rtl8723ae 86016 0
btcoexist 53248 1 rtl8723ae
rtl8723_common 24576 1 rtl8723ae
rtl_pci 28672 1 rtl8723ae
rtlwifi 77824 2 rtl_pci,rtl8723ae
mac80211 724992 2 rtl_pci,rtlwifi
cfg80211 540672 2 mac80211,rtlwifi
wmi 20480 1 mxm_wmi
##### interfaces ########################
auto lo
iface lo inet loopback
##### ifconfig ##########################
eth0 Link encap:Ethernet HWaddr <MAC 'eth0' [IF]>
inet addr:192.168.7.61 Bcast:192.168.7.255 Mask:255.255.255.0
inet6 addr: fe80::<IP6 'eth0' [IF]>/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:29151 errors:0 dropped:0 overruns:0 frame:0
TX packets:16273 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:15567099 (15.5 MB) TX bytes:2460199 (2.4 MB)
virbr0 Link encap:Ethernet HWaddr <MAC 'virbr0' [IF]>
inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
virbr0-nic Link encap:Ethernet HWaddr <MAC 'virbr0' [IF]>
BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:500
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
wlan0 Link encap:Ethernet HWaddr <MAC 'wlan0' [IF]>
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
##### iwconfig ##########################
virbr0-nic no wireless extensions.
eth0 no wireless extensions.
virbr0 no wireless extensions.
lo no wireless extensions.
wlan0 IEEE 802.11bgn ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=20 dBm
Retry short limit:7 RTS thr=2347 B Fragment thr:off
Power Management:off
##### route #############################
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.7.1 0.0.0.0 UG 100 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 eth0
192.168.7.0 0.0.0.0 255.255.255.0 U 100 0 0 eth0
192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0
##### resolv.conf #######################
nameserver 127.0.1.1
##### network managers ##################
Installed:
NetworkManager
Running:
root 999 1 0 12:39 ? 00:00:00 /usr/sbin/NetworkManager --no-daemon
##### NetworkManager info ###############
GENERAL.DEVICE: eth0
GENERAL.TYPE: ethernet
GENERAL.VENDOR: Realtek Semiconductor Co., Ltd.
GENERAL.PRODUCT: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
GENERAL.DRIVER: r8169
GENERAL.DRIVER-VERSION: 2.3LK-NAPI
GENERAL.FIRMWARE-VERSION:
GENERAL.HWADDR: <MAC 'eth0' [IF]>
GENERAL.MTU: 1500
GENERAL.STATE: 100 (connected)
GENERAL.REASON: 0 (No reason given)
GENERAL.UDI: /sys/devices/pci0000:00/0000:00:1c.3/0000:04:00.2/net/eth0
GENERAL.IP-IFACE: eth0
GENERAL.NM-MANAGED: yes
GENERAL.AUTOCONNECT: yes
GENERAL.FIRMWARE-MISSING: no
GENERAL.CONNECTION: Conexão cabeada 1
GENERAL.CON-UUID: 894d0e08-0474-4b2d-900b-ad9333880081
GENERAL.CON-PATH: /org/freedesktop/NetworkManager/ActiveConnection/0
CAPABILITIES.CARRIER-DETECT: yes
CAPABILITIES.SPEED: 100 Mb/s
CONNECTIONS.AVAILABLE-CONNECTION-PATHS: /org/freedesktop/NetworkManager/Settings/{1}
CONNECTIONS.AVAILABLE-CONNECTIONS[1]: 894d0e08-0474-4b2d-900b-ad9333880081 | Conexão cabeada 1
WIRED-PROPERTIES.CARRIER: on
IP4.ADDRESS[1]: ip = 192.168.7.61/24, gw = 192.168.7.1
IP4.ROUTE[1]: dst = 169.254.0.0/16, nh = 0.0.0.0, mt = 1000
IP4.DNS[1]: 192.168.7.1
DHCP4.OPTION[1]: requested_ntp_servers = 1
DHCP4.OPTION[2]: requested_domain_search = 1
DHCP4.OPTION[3]: requested_broadcast_address = 1
DHCP4.OPTION[4]: requested_domain_name = 1
DHCP4.OPTION[5]: requested_rfc3442_classless_static_routes = 1
DHCP4.OPTION[6]: requested_time_offset = 1
DHCP4.OPTION[7]: expiry = 1443713945
DHCP4.OPTION[8]: requested_wpad = 1
DHCP4.OPTION[9]: next_server = 0.0.0.0
DHCP4.OPTION[10]: requested_netbios_scope = 1
DHCP4.OPTION[11]: requested_interface_mtu = 1
DHCP4.OPTION[12]: requested_subnet_mask = 1
DHCP4.OPTION[13]: dhcp_lease_time = 4294967295
DHCP4.OPTION[14]: ip_address = 192.168.7.61
DHCP4.OPTION[15]: subnet_mask = 255.255.255.0
DHCP4.OPTION[16]: requested_static_routes = 1
DHCP4.OPTION[17]: routers = 192.168.7.1
DHCP4.OPTION[18]: broadcast_address = 192.168.7.255
DHCP4.OPTION[19]: domain_name_servers = 192.168.7.1
DHCP4.OPTION[20]: requested_domain_name_servers = 1
DHCP4.OPTION[21]: requested_netbios_name_servers = 1
DHCP4.OPTION[22]: requested_routers = 1
DHCP4.OPTION[23]: requested_ms_classless_static_routes = 1
DHCP4.OPTION[24]: dhcp_message_type = 5
DHCP4.OPTION[25]: requested_host_name = 1
DHCP4.OPTION[26]: network_number = 192.168.7.0
DHCP4.OPTION[27]: dhcp_server_identifier = 192.168.7.1
IP6.ADDRESS[1]: ip = fe80::<IP6 'eth0' [IF]>/64, gw = ::
GENERAL.DEVICE: wlan0
GENERAL.TYPE: wifi
GENERAL.VENDOR: Realtek Semiconductor Co., Ltd.
GENERAL.PRODUCT: RTL8723AE PCIe Wireless Network Adapter
GENERAL.DRIVER: rtl8723ae
GENERAL.DRIVER-VERSION: 3.19.0-30-generic
GENERAL.FIRMWARE-VERSION: N/A
GENERAL.HWADDR: <MAC 'wlan0' [IF]>
GENERAL.MTU: 1500
GENERAL.STATE: 30 (disconnected)
GENERAL.REASON: 42 (The supplicant is now available)
GENERAL.UDI: /sys/devices/pci0000:00/0000:00:1c.2/0000:03:00.0/net/wlan0
GENERAL.IP-IFACE:
GENERAL.NM-MANAGED: yes
GENERAL.AUTOCONNECT: yes
GENERAL.FIRMWARE-MISSING: no
GENERAL.CONNECTION: --
GENERAL.CON-UUID: --
GENERAL.CON-PATH: --
CAPABILITIES.CARRIER-DETECT: no
CAPABILITIES.SPEED: unknown
CONNECTIONS.AVAILABLE-CONNECTION-PATHS:
WIFI-PROPERTIES.WEP: yes
WIFI-PROPERTIES.WPA: yes
WIFI-PROPERTIES.WPA2: yes
WIFI-PROPERTIES.TKIP: yes
WIFI-PROPERTIES.CCMP: yes
WIFI-PROPERTIES.AP: yes
WIFI-PROPERTIES.ADHOC: yes
GENERAL.DEVICE: virbr0-nic
GENERAL.TYPE: tap
GENERAL.VENDOR: --
GENERAL.PRODUCT: --
GENERAL.DRIVER:
GENERAL.DRIVER-VERSION: 1.6
GENERAL.FIRMWARE-VERSION:
GENERAL.HWADDR: <MAC 'virbr0' [IF]>
GENERAL.MTU: 1500
GENERAL.STATE: 10 (unmanaged)
GENERAL.REASON: 0 (No reason given)
GENERAL.UDI: /sys/devices/virtual/net/virbr0-nic
GENERAL.IP-IFACE: virbr0-nic
GENERAL.NM-MANAGED: no
GENERAL.AUTOCONNECT: yes
GENERAL.FIRMWARE-MISSING: no
GENERAL.CONNECTION: --
GENERAL.CON-UUID: --
GENERAL.CON-PATH: --
CAPABILITIES.CARRIER-DETECT: yes
CAPABILITIES.SPEED: unknown
CONNECTIONS.AVAILABLE-CONNECTION-PATHS:
SSID BSSID MODE CHAN FREQ RATE SIGNAL BARS SECURITY ACTIVE *
##### NetworkManager.state ##############
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
WimaxEnabled=true
##### NetworkManager.conf ###############
[main]
plugins=ifupdown,keyfile,ofono
dns=dnsmasq
[ifupdown]
managed=false
##### NetworkManager profiles ###########
[[/etc/NetworkManager/system-connections/Atlantis]] (600 root)
[connection] id=Atlantis | type=wifi
[wifi] ssid=Atlantis | mac-address=<MAC 'wlan0' [IF]>
[ipv4] method=auto
[ipv6] method=auto
##### iw reg get ########################
Region: America/Sao_Paulo (based on set time zone)
country 00: DFS-UNSET
(2402 - 2472 @ 40), (N/A, 20), (N/A)
(2457 - 2482 @ 40), (N/A, 20), (N/A), NO-IR
(2474 - 2494 @ 20), (N/A, 20), (N/A), NO-OFDM, NO-IR
(5170 - 5250 @ 80), (N/A, 20), (N/A), NO-IR
(5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS, NO-IR
(5490 - 5730 @ 160), (N/A, 20), (0 ms), DFS, NO-IR
(5735 - 5835 @ 80), (N/A, 20), (N/A), NO-IR
(57240 - 63720 @ 2160), (N/A, 0), (N/A)
##### iwlist channels ###################
virbr0-nic no frequency information.
eth0 no frequency information.
virbr0 no frequency information.
lo no frequency information.
wlan0 13 channels in total; available frequencies :
Channel 01 : 2.412 GHz
Channel 02 : 2.417 GHz
Channel 03 : 2.422 GHz
Channel 04 : 2.427 GHz
Channel 05 : 2.432 GHz
Channel 06 : 2.437 GHz
Channel 07 : 2.442 GHz
Channel 08 : 2.447 GHz
Channel 09 : 2.452 GHz
Channel 10 : 2.457 GHz
Channel 11 : 2.462 GHz
Channel 12 : 2.467 GHz
Channel 13 : 2.472 GHz
##### iwlist scan #######################
virbr0-nic Interface doesn't support scanning.
eth0 Interface doesn't support scanning.
virbr0 Interface doesn't support scanning.
lo Interface doesn't support scanning.
wlan0 No scan results
##### module infos ######################
[rtl8723ae]
filename: /lib/modules/3.19.0-30-generic/kernel/drivers/net/wireless/rtlwifi/rtl8723ae/rtl8723ae.ko
firmware: rtlwifi/rtl8723efw.bin
description: Realtek 8723E 802.11n PCI wireless
license: GPL
author: Realtek WlanFAE <wlanfae@realtek.com>
author: lizhaoming <chaoming_li@realsil.com.cn>
srcversion: E157B5085A0F66FF49B6BCD
depends: rtlwifi,rtl8723-common,rtl_pci,btcoexist
intree: Y
vermagic: 3.19.0-30-generic SMP mod_unload modversions
signer: Magrathea: Glacier signing key
sig_key: 09:1D:B2:76:17:3D:83:37:42:E9:6A:C8:70:59:1A:DB:9B:CC:DA:53
sig_hashalgo: sha512
parm: swenc:Set to 1 for software crypto (default 0)
(bool)
parm: ips:Set to 0 to not use link power save (default 1)
(bool)
parm: swlps:Set to 1 to use SW control power save (default 0)
(bool)
parm: fwlps:Set to 1 to use FW control power save (default 1)
(bool)
parm: debug:Set debug level (0-5) (default 0) (int)
parm: disable_watchdog:Set to 1 to disable the watchdog (default 0)
(bool)
[rtl8723_common]
filename: /lib/modules/3.19.0-30-generic/kernel/drivers/net/wireless/rtlwifi/rtl8723com/rtl8723-common.ko
description: Realtek RTL8723AE/RTL8723BE 802.11n PCI wireless common routines
license: GPL
author: Larry Finger <Larry.Finger@lwfinger.net>
author: Realtek WlanFAE <wlanfae@realtek.com>
srcversion: 251C540A2D3AD38CCA85ED9
depends:
intree: Y
vermagic: 3.19.0-30-generic SMP mod_unload modversions
signer: Magrathea: Glacier signing key
sig_key: 09:1D:B2:76:17:3D:83:37:42:E9:6A:C8:70:59:1A:DB:9B:CC:DA:53
sig_hashalgo: sha512
[rtl_pci]
filename: /lib/modules/3.19.0-30-generic/kernel/drivers/net/wireless/rtlwifi/rtl_pci.ko
description: PCI basic driver for rtlwifi
license: GPL
author: Larry Finger <Larry.FInger@lwfinger.net>
author: Realtek WlanFAE <wlanfae@realtek.com>
author: lizhaoming <chaoming_li@realsil.com.cn>
srcversion: A25DC6D8C53D55DA133BC49
depends: mac80211,rtlwifi
intree: Y
vermagic: 3.19.0-30-generic SMP mod_unload modversions
signer: Magrathea: Glacier signing key
sig_key: 09:1D:B2:76:17:3D:83:37:42:E9:6A:C8:70:59:1A:DB:9B:CC:DA:53
sig_hashalgo: sha512
[rtlwifi]
filename: /lib/modules/3.19.0-30-generic/kernel/drivers/net/wireless/rtlwifi/rtlwifi.ko
description: Realtek 802.11n PCI wireless core
license: GPL
author: Larry Finger <Larry.FInger@lwfinger.net>
author: Realtek WlanFAE <wlanfae@realtek.com>
author: lizhaoming <chaoming_li@realsil.com.cn>
srcversion: 35016235A31CEB1854418E1
depends: mac80211,cfg80211
intree: Y
vermagic: 3.19.0-30-generic SMP mod_unload modversions
signer: Magrathea: Glacier signing key
sig_key: 09:1D:B2:76:17:3D:83:37:42:E9:6A:C8:70:59:1A:DB:9B:CC:DA:53
sig_hashalgo: sha512
[mac80211]
filename: /lib/modules/3.19.0-30-generic/kernel/net/mac80211/mac80211.ko
license: GPL
description: IEEE 802.11 subsystem
srcversion: 6AE775D26377F997426A49D
depends: cfg80211
intree: Y
vermagic: 3.19.0-30-generic SMP mod_unload modversions
signer: Magrathea: Glacier signing key
sig_key: 09:1D:B2:76:17:3D:83:37:42:E9:6A:C8:70:59:1A:DB:9B:CC:DA:53
sig_hashalgo: sha512
parm: minstrel_vht_only:Use only VHT rates when VHT is supported by sta. (bool)
parm: max_nullfunc_tries:Maximum nullfunc tx tries before disconnecting (reason 4). (int)
parm: max_probe_tries:Maximum probe tries before disconnecting (reason 4). (int)
parm: beacon_loss_count:Number of beacon intervals before we decide beacon was lost. (int)
parm: probe_wait_ms:Maximum time(ms) to wait for probe response before disconnecting (reason 4). (int)
parm: ieee80211_default_rc_algo:Default rate control algorithm for mac80211 to use (charp)
[cfg80211]
filename: /lib/modules/3.19.0-30-generic/kernel/net/wireless/cfg80211.ko
description: wireless configuration support
license: GPL
author: Johannes Berg
srcversion: F28307769349A31F4B24FC2
depends:
intree: Y
vermagic: 3.19.0-30-generic SMP mod_unload modversions
signer: Magrathea: Glacier signing key
sig_key: 09:1D:B2:76:17:3D:83:37:42:E9:6A:C8:70:59:1A:DB:9B:CC:DA:53
sig_hashalgo: sha512
parm: ieee80211_regdom:IEEE 802.11 regulatory domain code (charp)
parm: cfg80211_disable_40mhz_24ghz:Disable 40MHz support in the 2.4GHz band (bool)
##### module parameters #################
[rtl8723ae]
debug: 0
disable_watchdog: N
fwlps: Y
ips: Y
swenc: N
swlps: N
[mac80211]
beacon_loss_count: 7
ieee80211_default_rc_algo: minstrel_ht
max_nullfunc_tries: 2
max_probe_tries: 5
minstrel_vht_only: Y
probe_wait_ms: 500
[cfg80211]
cfg80211_disable_40mhz_24ghz: N
ieee80211_regdom: 00
##### /etc/modules ######################
##### modprobe options ##################
[/etc/modprobe.d/blacklist-ath_pci.conf]
blacklist ath_pci
[/etc/modprobe.d/blacklist.conf]
blacklist evbug
blacklist usbmouse
blacklist usbkbd
blacklist eepro100
blacklist de4x5
blacklist eth1394
blacklist snd_intel8x0m
blacklist snd_aw2
blacklist i2c_i801
blacklist prism54
blacklist bcm43xx
blacklist garmin_gps
blacklist asus_acpi
blacklist snd_pcsp
blacklist pcspkr
blacklist amd76x_edac
[/etc/modprobe.d/blacklist-rare-network.conf]
alias net-pf-3 off
alias net-pf-6 off
alias net-pf-9 off
alias net-pf-11 off
alias net-pf-12 off
alias net-pf-19 off
alias net-pf-21 off
alias net-pf-36 off
[/etc/modprobe.d/intel-microcode-blacklist.conf]
blacklist microcode
[/etc/modprobe.d/iwlwifi.conf]
remove iwlwifi \
(/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod) \
&& /sbin/modprobe -r mac80211
[/etc/modprobe.d/mlx4.conf]
softdep mlx4_core post: mlx4_en
[/etc/modprobe.d/qemu-system-x86.conf]
options kvm_intel nested=1
##### rc.local ##########################
exit 0
##### pm-utils ##########################
##### udev rules ########################
[/etc/udev/rules.d/70-persistent-net.rules]
# PCI device 0x10ec:0x8168 (r8169)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC 'eth0' [IF]>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
# PCI device 0x10ec:0x8723 (rtl8723ae)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC 'wlan0' [IF]>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan0"
##### dmesg #############################
[ 9.169518] rtl8723ae: Using firmware rtlwifi/rtl8723fw_B.bin
[ 9.180638] ieee80211 phy0: Selected rate control algorithm 'rtl_rc'
[ 9.180942] rtlwifi: rtlwifi: wireless switch is on
[ 10.747446] r8169 0000:04:00.2 eth0: link down (repeated 2 times)
[ 12.301950] r8169 0000:04:00.2 eth0: link up
[ 18.607023] device virbr0-nic entered promiscuous mode
[ 18.721281] virbr0: port 1(virbr0-nic) entered listening state (repeated 2 times)
[ 18.728241] virbr0: port 1(virbr0-nic) entered disabled state
########## wireless info END ############
0
задан Robinson RK
8 June 2016 в 17:48
поделиться
1 ответ
Выполненный в терминале
sudo add-apt-repository ppa:hanipouspilot/rtlwifi
sudo apt-get update
sudo apt-get install rtlwifi-new-dkms linux-firmware
0
ответ дан Pilot6
9 June 2016 в 03:48
поделиться
-
1Спасибо, Это работало. Я can' t понимают почему этот doesn' t прибывают установленные по умолчанию.. – Qwertie 22 December 2016 в 19:57