I'm also experiencing this problem - but I'd say I have it for a week -
everything worked fine until last week (I've switched to precise during
the beta phase).
executing
ifconfig wlan0 down; ifconfig wlan0 up; route add default gw 192.168.1.1
seems to re-enable wifi for a while, but I can never tell for how long.
sometimes it works an hour, sometimes it works only a minute.
my wifi card is
*-network
description: Wireless interface
product: Ultimate N WiFi Link 5300
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:05:00.0
logical name: wlan0
version: 00
serial: xx:xx:xx:xx:xx:xx
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet
physical wireless
configuration: broadcast=yes driver=iwlwifi
driverversion=3.2.0-29-generic firmware=8.83.5.1 build 33692 ip=192.168.1.7
latency=0 link=yes multicast=yes wireless=IEEE 802.11abgn
resources: irq:49 memory:f0a00000-f0a01fff
$ uname -a
Linux juergen 3.2.0-29-generic #46-Ubuntu SMP Fri Jul 27 17:03:23 UTC 2012
x86_64 x86_64 x86_64 GNU/Linux
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https://bugs.launchpad.net/bugs/981167
Title:
Wifi Networking in Precise is intermittent
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