I have a notebook with Realtek 8723 wireless card and I'm having some difficulties to connect with it. I've followed the instructions of this topic and it worked well. However, while I was watching a video in Firefox, the entire system crashed and I was forced shutdown using power button. When I started Ubuntu again, it don't identify any wireless network. I've reinstalled the module but it didn't worked. The module is loaded but don't find any network. What could be the cause of this problem?
hudson@hudson-avell:~$ modinfo rtl8723e filename: /lib/modules/3.5.0-37-generic/kernel/drivers/net/wireless/rtlwifi/rtl8723e/rtl8723e.ko firmware: rtlwifi/rtl8723efw.bin description: Realtek 8723E 802.11n PCI wireless license: GPL author: Realtek WlanFAE <firstname.lastname@example.org> author: lizhaoming <email@example.com> srcversion: 161CC0CE5CE8DD8F90D732E alias: pci:v000010ECd00008723sv*sd*bc*sc*i* depends: rtlwifi,mac80211 vermagic: 3.5.0-37-generic SMP mod_unload modversions parm: swlps:bool parm: swenc:using hardware crypto (default 0 [hardware]) (bool) parm: ips:using no link power save (default 1 is open) (bool) parm: fwlps:using linked fw control power save (default 1 is open) (bool)