wifi wont stay connected very slow at укради

my wifi wont stay connected, sometimes it disconnects. other укради it says its still connected but i cant похвалите any pages и т.д. is there any way to fix this? i just installed ubuntu 14 latest.

output of

я потею lshw-class network

*-network
description: Wireless интерфейс product: BCM43142 802.11b/g/n vendor: Broadcom Corporation physical пойдите: 0 автобус info: pci@0000:08:00.0 logical ямс: wlan1 версия: 01 сериал: you dont need this width: 64 бита clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=wl0 driverversion=6.30.223.248 (r487574) ip=192.168.1.220 latency=0 multicast=yes wireless=IEEE 802.11abg resources: irq:18 memory:b2500000-b2507fff

output of

lspci

08:00.0 Network controller: Broadcom Corporation BCM43142 802.11b/g/n (rev 01)