Whenever I boot up my computer, speedtest.net shows an internet speed in excess of 20 Mbps. After around five minutes it consistently drops down to just over 1 Mbps and stays at that download speed. The upload speed remains unchanged at around 3 Mbps. I checked Glasnot just to check if my ISP was somehow throttling my internet but this doesn't seem to be the case. My other laptop and those of my housemates all show download speeds of over 20 Mbps.

I have a system76 Lemur Ultra laptop. I have tried restoring the system and also installing the latest drivers from system76 (Driver Version 3.2.3).

Here are the specs I get when I run the following command:

Code:
cat /etc/lsb-release; uname -a
lspci -nnk | grep -iA2 net
iwconfig
rfkill list all
lsmod
Code:
ciaran@ciaran-Lemur-Ultra:~$ cat /etc/lsb-release; uname -a
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=12.10
DISTRIB_CODENAME=quantal
DISTRIB_DESCRIPTION="Ubuntu 12.10"
Linux ciaran-Lemur-Ultra 3.5.0-19-generic #30-Ubuntu SMP Tue Nov 13 17:48:01 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
ciaran@ciaran-Lemur-Ultra:~$ lspci -nnk | grep -iA2 net
02:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8188CE 802.11b/g/n WiFi Adapter [10ec:8176] (rev 01)
    Subsystem: Realtek Semiconductor Co., Ltd. Device [10ec:9196]
    Kernel driver in use: rtl8192ce
--
03:00.0 Ethernet controller [0200]: JMicron Technology Corp. JMC250 PCI Express Gigabit Ethernet Controller [197b:0250] (rev 05)
    Subsystem: CLEVO/KAPOK Computer Device [1558:4140]
    Kernel driver in use: jme
ciaran@ciaran-Lemur-Ultra:~$ iwconfig
eth0      no wireless extensions.

lo        no wireless extensions.

wlan0     IEEE 802.11bgn  ESSID:"BlackFish"  
          Mode:Managed  Frequency:2.412 GHz  Access Point: 00:24:B2:25:B8:76   
          Bit Rate=18 Mb/s   Tx-Power=20 dBm   
          Retry  long limit:7   RTS thr=2347 B   Fragment thr:off
          Power Management:off
          Link Quality=66/70  Signal level=-44 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:18929   Missed beacon:0

ciaran@ciaran-Lemur-Ultra:~$ rfkill list all
0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
ciaran@ciaran-Lemur-Ultra:~$
I saw the following fix used a lot in this forum and decided to give it a try:

Code:
sudo ifconfig wlan0 down
sudo rmmod -f rtl8192ce
sudo modprobe rtl8192ce nohwcrypt=1
sudo ifconfig wlan0 up
When I run the third command I get the following error and I cannot reconnect to the wireless.

Code:
FATAL: Error inserting rtl8192ce (/lib/modules/3.5.0-19-generic/kernel/drivers/net/wireless/rtlwifi/rtl8192ce/rtl8192ce.ko): Invalid argument
I am not sure if this problem has something to do with the specific Realtek rtl8192ce kernal driver that system76 use. At this point, I am at a loss with what to do. Any help would be greatly appreciated.