Ubuntu and my impossible wireless

There is near zero detail here......

What is the wifi chip?
Acer make HUNDREDS of systems, we don't even know if it is a laptop or desktop.....what exact model is the system?
Is the system fully updated?
What is the output of:

sudo lshw -C network; lsb_release -a; uname -a; sudo rfkill list

Thanks

so this is the output

jk@jk:~$ sudo lshw -C network;lsb_release-a; uname-a; sudo rfkill list
[sudo] password for jk:
  *-network
       description: Ethernet interface
       product: NetLink BCM5787M Gigabit Ethernet PCI Express
       vendor: Broadcom Corporation
       physical id: 0
       bus info: pci@0000:02:00.0
       logical name: eth0
       version: 02
       serial: 00:1d:72:23:35:45
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm vpd msi pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=tg3 driverversion=3.121 firmware=5787m-v3.23 latency=0 link=no multicast=yes port=twisted pair
       resources: irq:44 memory:f6000000-f600ffff
  *-network
       description: Network controller
       product: BCM4311 802.11b/g WLAN
       vendor: Broadcom Corporation
       physical id: 0
       bus info: pci@0000:04:00.0
       version: 01
       width: 32 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list
       configuration: driver=b43-pci-bridge latency=0
       resources: irq:17 memory:f8000000-f8003fff
  *-network:0
       description: Wireless interface
       physical id: 1
       bus info: usb@2:1
       logical name: wlan1
       serial: 00:0f:54:00:24:94
       capabilities: ethernet physical wireless
       configuration: broadcast=yes driver=rt2800usb driverversion=3.2.0-35-generic-pae firmware=0.29 link=no multicast=yes wireless=IEEE 802.11bgn
  *-network:1 DISABLED
       description: Wireless interface
       physical id: 2
       logical name: wlan0
       serial: 00:1f:3a:23:ab:92
       capabilities: ethernet physical wireless
       configuration: broadcast=yes driver=b43 driverversion=3.2.0-35-generic-pae firmware=N/A link=no multicast=yes wireless=IEEE 802.11bg
lsb_release-a: command not found
uname-a: command not found
0: phy0: Wireless LAN
 Soft blocked: no
 Hard blocked: no
1: phy1: Wireless LAN
 Soft blocked: no
 Hard blocked: no
2: acer-wireless: Wireless LAN
 Soft blocked: no
 Hard blocked: no

Thanks

i don't know if it's important but i also have deja vu back up files. maybe i can restore from it? but idon't know how to do i..

What is the output of:

dmesg | grep -i firm

Thanks

Did you also use:
https://help.ubuntu.com/community/WifiDocs/Driver/bcm43xx

jk@jk:~$ dmesg | grep -i firm
[ 0.167572] [Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored
jk@jk:~$

Thanks

and also used the link but didn't work...

Thanks

run:

sudo apt-get update
sudo apt-get install bcmwl-kernel-source linux-headers-generic linux-headers-generic linux-headers-`uname -r`

Note: If you see the message "Module build for the currently running kernel was skipped since the kernel source for this kernel does not seem to be installed" then you are missing the appropriate generic linux-header package(s).

Then reboot?

did it and i'm sorry but, nope! doesn't work.

Thanks.

Do a search for questions relating to 732677, and you will find solutions to your original Broadcom wifi problem. Basically, you can either try to install an older version of the STA driver, or just install the firmware for the b43 driver. With the addition of another wifi device, you first have to choose which to use, then clean out all the others because they interfere with each other. I recommend the b43 driver (which is the default one), and install the b43-fwcutter package to get the firmware. Search the questions for 4311 for many detailed instructions for this.