I just did a Ubuntu 12.04 LTS dual boot on Toshiba S55-a5358 laptop with Windows 8 pre-installed.

I had problems with dual boot so had to use boot-repair.
Also had problems with getting the wireless to work and this answer by chilli555 worked:

Ubuntu 12.04 Realtek RTL8188E Wireless Card Not Detected

However the wireless on Ubuntu 12.04 LTS is very flaky, slow and drops.

$ dmesg | grep rtl

[    7.282473] rtl8188ee 0000:02:00.0: enabling device (0000 -> 0003)

[    7.289730] rtl8188ee: Using firmware rtlwifi/rtl8188efw.bin

[    7.953254] ieee80211 phy0: Selected rate control algorithm 'rtl_rc'

[    7.953400] rtlwifi: wireless switch is on

[  594.241828] rtlwifi:rtl_watchdog_wq_callback():<0-0> AP off, try to reconnect now

[  928.494384] rtlwifi:rtl_watchdog_wq_callback():<0-0> AP off, try to reconnect now

[ 1163.316277] rtlwifi:addbareq_rx():<10000-1> sta is NULL

[ 1360.990311] rtlwifi:rtl_watchdog_wq_callback():<0-0> AP off, try to reconnect now

The wireless on Windows 8 works super fast and no drops. I need help in getting the wireless to work consistently and fast on Ubuntu 12.04.

Thank you in advance.

As Per chilli555's comment:

azhar@azhar-Satellite-S55-A:~$ cat /var/log/syslog | grep -e wlan -e reason | tail -n25

Feb  4 11:56:51 azhar-Satellite-S55-A kernel: [ 2629.951397] wlan0: RX AssocResp from c8:cb:b8:f0:76:70 (capab=0x431 status=0 aid=8)

Feb  4 11:56:51 azhar-Satellite-S55-A kernel: [ 2629.951794] wlan0: associated

Feb  4 11:56:51 azhar-Satellite-S55-A NetworkManager[1368]: <info> (wlan0): supplicant interface state: associating -> associated

Feb  4 11:56:51 azhar-Satellite-S55-A NetworkManager[1368]: <info> (wlan0): supplicant interface state: associated -> 4-way handshake

Feb  4 11:56:51 azhar-Satellite-S55-A NetworkManager[1368]: <info> (wlan0): supplicant interface state: 4-way handshake -> completed

Feb  4 11:56:51 azhar-Satellite-S55-A NetworkManager[1368]: <info> (wlan0): roamed from BSSID C8:CB:B8:F0:76:F0 (HUB) to C8:CB:B8:F0:76:70 (HUB)

Feb  4 11:58:07 azhar-Satellite-S55-A NetworkManager[1368]: <info> (eth0): device state change: activated -> unavailable (reason 'carrier-changed') [100 20 40]

Feb  4 11:58:07 azhar-Satellite-S55-A NetworkManager[1368]: <info> (eth0): deactivating device (reason 'carrier-changed') [40]

Feb  4 11:58:08 azhar-Satellite-S55-A NetworkManager[1368]: <info> Policy set 'HUB' (wlan0) as default for IPv4 routing and DNS.

Feb  4 11:58:08 azhar-Satellite-S55-A NetworkManager[1368]: <info> Policy set 'HUB' (wlan0) as default for IPv4 routing and DNS.

Feb  4 11:59:42 azhar-Satellite-S55-A kernel: [ 2800.378747] wlan0: Connection to AP c8:cb:b8:f0:76:70 lost

Feb  4 11:59:42 azhar-Satellite-S55-A wpa_supplicant[1409]: CTRL-EVENT-DISCONNECTED bssid=c8:cb:b8:f0:76:70 reason=4

Feb  4 11:59:42 azhar-Satellite-S55-A NetworkManager[1368]: <info> (wlan0): supplicant interface state: completed -> disconnected

Feb  4 11:59:42 azhar-Satellite-S55-A NetworkManager[1368]: <info> (wlan0): supplicant interface state: disconnected -> scanning

Feb  4 11:59:43 azhar-Satellite-S55-A kernel: [ 2801.758438] wlan0: authenticate with c8:cb:b8:f0:a7:10

Feb  4 11:59:43 azhar-Satellite-S55-A NetworkManager[1368]: <info> (wlan0): supplicant interface state: scanning -> authenticating

Feb  4 11:59:43 azhar-Satellite-S55-A kernel: [ 2801.777780] wlan0: send auth to c8:cb:b8:f0:a7:10 (try 1/3)

Feb  4 11:59:43 azhar-Satellite-S55-A kernel: [ 2801.781551] wlan0: authenticated

Feb  4 11:59:43 azhar-Satellite-S55-A kernel: [ 2801.785467] wlan0: associate with c8:cb:b8:f0:a7:10 (try 1/3)

Feb  4 11:59:43 azhar-Satellite-S55-A NetworkManager[1368]: <info> (wlan0): supplicant interface state: authenticating -> associating

Feb  4 11:59:43 azhar-Satellite-S55-A kernel: [ 2801.790905] wlan0: RX AssocResp from c8:cb:b8:f0:a7:10 (capab=0x431 status=0 aid=5)

Feb  4 11:59:43 azhar-Satellite-S55-A kernel: [ 2801.791305] wlan0: associated

Feb  4 11:59:43 azhar-Satellite-S55-A NetworkManager[1368]: <info> (wlan0): supplicant interface state: associating -> 4-way handshake

Feb  4 11:59:45 azhar-Satellite-S55-A NetworkManager[1368]: <info> (wlan0): supplicant interface state: 4-way handshake -> completed

Feb  4 11:59:45 azhar-Satellite-S55-A NetworkManager[1368]: <info> (wlan0): roamed from BSSID C8:CB:B8:F0:76:70 (HUB) to C8:CB:B8:F0:A7:10 (HUB)

Another comment, the Wireless connection Applet "Bars" keep going up and down.
FYI, this does not happen on Windows 8 or my other Ubuntu laptop (ASUS) also running 12.04 LTS.

Also getting the following results:

http://paste.ubuntu.com/6875216/