Problem with internet connection dropping after a few minutes.

Kerryman · 03-29-2014, 01:42 PM

Disabled ufw firewall and flushed iptables. Problem with connection still here. Is it risky having firewall inactive?

joe_2000 · 03-29-2014, 02:32 PM

It's ok when you are in your home network behind a router. It's risky when you are in public wifi networks

As long as you are at home I'd leave it disabled for debugging purposes.

Ok. Did you try

Code:

sudo apt-get update

Before doing

Code:

sudo apt-get install firmware-realtek

?

Kerryman · 03-29-2014, 04:53 PM

Yes. I ran

Code:

sudo apt-get update

successfully but then got

Code:

 sudo apt-get install firmware-realtek
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package firmware-realtek

joe_2000 · 03-30-2014, 11:36 AM

Hmm, strange. Seems like Ubuntu is naming packages different here. Maybe a last idea to verify if the right driver is installed.
Can you post the output

Code:

ls /lib/firmware

Now that the firewalls is disabled are there any interesting differences when you type the commands that show your system logs?

Code:

dmesg | grep wlan
cat /var/log/kern.log | grep wlan | tail -n 50

(Be aware that a reboot might have enabled the firewall again)

Kerryman · 03-30-2014, 01:59 PM

Code:

joseph@joseph-Equium-A60 ~ $ ls /lib/firmware
3.8.0-33-generic             mrvl
3.8.0-35-generic             mts_cdma.fw
3com                         mts_edge.fw
acenic                       mts_gsm.fw
adaptec                      mts_mt9234mu.fw
advansys                     mts_mt9234zba.fw
agere_ap_fw.bin              mwl8k
agere_sta_fw.bin             myri10ge_ethp_z8e.dat
aic94xx-seq.fw               myri10ge_eth_z8e.dat
amd-ucode                    myri10ge_rss_ethp_z8e.dat
ar3k                         myri10ge_rss_eth_z8e.dat
ar5523.bin                   NPE-B
asihpi                       NPE-C
ath3k-1.fw                   ositech
ath6k                        phanfw.bin
atmel_at76c504_2958.bin      ql2100_fw.bin
atmel_at76c504a_2958.bin     ql2200_fw.bin
atmsar11.fw                  ql2300_fw.bin
av7110                       ql2322_fw.bin
bnx2x                        ql2400_fw.bin
brcm                         ql2500_fw.bin
carl9170-1.fw                r128
carl9170fw                   radeon
cis                          README
configure                    rt2561.bin
cpia2                        rt2561s.bin
cxgb3                        rt2661.bin
cxgb4                        rt2860.bin
dsp56k                       rt2870.bin
dvb-fe-xc5000-1.6.114.fw     rt3070.bin
dvb-usb-dib0700-1.20.fw      rt3090.bin
dvb-usb-terratec-h5-drxk.fw  rt3290.bin
ea                           rt73.bin
edgeport                     RTL8192E
emi26                        rtl_nic
emi62                        rtlwifi
ene-ub6250                   s2250.fw
ess                          s2250_loader.fw
f2255usb.bin                 s5p-mfc
GPL-3                        sb16
hp                           scripts
htc_7010.fw                  slicoss
htc_9271.fw                  sun
i2400m-fw-usb-1.4.sbcf       tehuti
i2400m-fw-usb-1.5.sbcf       ti_3410.fw
i6050-fw-usb-1.5.sbcf        ti_5052.fw
ipw2100-1.3.fw               ti-connectivity
ipw2100-1.3-i.fw             tigon
ipw2100-1.3-p.fw             tlg2300_firmware.bin
ipw2200-bss.fw               ttusb-budget
ipw2200-ibss.fw              ueagle-atm
ipw2200-sniffer.fw           usbdux
isci                         usbduxfast_firmware.bin
iwlwifi-1000-5.ucode         usbdux_firmware.bin
iwlwifi-100-5.ucode          usbduxsigma_firmware.bin
iwlwifi-105-6.ucode          v4l-cx231xx-avcore-01.fw
iwlwifi-135-6.ucode          v4l-cx23418-apu.fw
iwlwifi-2000-6.ucode         v4l-cx23418-cpu.fw
iwlwifi-2030-6.ucode         v4l-cx23418-dig.fw
iwlwifi-3945-2.ucode         v4l-cx2341x-dec.fw
iwlwifi-4965-2.ucode         v4l-cx2341x-enc.fw
iwlwifi-5000-5.ucode         v4l-cx2341x-init.mpg
iwlwifi-5150-2.ucode         v4l-cx23885-avcore-01.fw
iwlwifi-6000-4.ucode         v4l-cx25840.fw
iwlwifi-6000g2a-5.ucode      v4l-pvrusb2-24xxx-01.fw
iwlwifi-6000g2a-6.ucode      v4l-pvrusb2-29xxx-01.fw
iwlwifi-6000g2b-6.ucode      vicam
iwlwifi-6050-5.ucode         vntwusb.fw
kaweth                       vxge
keyspan                      WHENCE.ubuntu
keyspan_pda                  whiteheat.fw
korg                         whiteheat_loader.fw
lbtf_usb.bin                 yam
lgs8g75.fw                   yamaha
libertas                     zd1201-ap.fw
Makefile                     zd1201.fw
matrox                       zd1211

ufw is still inactive after reboot.

joe_2000 · 03-30-2014, 02:41 PM

Quote:

Originally Posted by Kerryman

ufw is still inactive after reboot.

And do the logs look different now?
If there is nothing there I am running out of ideas...
Your /lib/firmware directory has a RTL8192E, I am wondering if this is used by your system, and if it would be better to have a lib that has the exact name of your chipset. But I wouldn't know which package your distro would need to get it.
If it was my computer I would probably try to download a driver directly from realtek and compile it if needed. But I am not confident enough to be able to guide you through that process.
If you feel like trying you could go ahead and search "realtek driver RTL8192CU ubuntu" or similar.

Actually this driver is supposed to be in the kernel, I am just thinking that you may need a more recent version, so it might be worth a try...

Kerryman · 04-04-2014, 04:01 PM

Thanks for all your efforts. I really appreciate it. Not sure if I'll try downloading realtek driver RTL8192CU as I still haven't mastered how to run(execute) programmes from Downloads folder or even cd's. Usually get message sayin "no such file or directory" or "not a valid path" even when I paste "home/joseph/Downloads/file name. Think I'll give up gracefully. Thanks again.

joe_2000 · 04-04-2014, 04:12 PM

Quote:

Originally Posted by Kerryman

Thanks for all your efforts. I really appreciate it. Not sure if I'll try downloading realtek driver RTL8192CU as I still haven't mastered how to run(execute) programmes from Downloads folder or even cd's. Usually get message sayin "no such file or directory" or "not a valid path" even when I paste "home/joseph/Downloads/file name. Think I'll give up gracefully. Thanks again.

You are welcome, sorry I could not help you fix this. The new Mint LTS release is probably going to be released very soon. (Ubuntu LTS is due this month, and Mint is typically being released one month after Ubuntu or so). You may want to give that a try. Maybe it picks up your hardware a bit better since it ships with a more recent kernel...