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Thread: How to install RTL8187 driver to Ubuntu 13.04?

  1. #21
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    Re: How to install RTL8187 driver to Ubuntu 13.04?

    Quote Originally Posted by chili555 View Post
    What is the exact name of the package? I doubt it is an improvement on the driver rtl8187 in the kernel by default.
    OK Chili,this time I use my HP to post this,I've brought it closer to the signal source,it must have minimum 3 lines out of 4 on the signal level bar in order to function better.For some reason,system doesn't tolerate lower level of signal.Please,let me know if there is some way to improve that,and please help me bring internal wifi back to life.I appreciate your help and effort,thank you so much for your time,and your wish to share your knowledge with us.

  2. #22
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    Re: How to install RTL8187 driver to Ubuntu 13.04?

    I highly doubt we can get the internal to perform better or even as well as an external device which includes an antenna. Is the antenna aimable? Does it help to move the computer slightly to better align the antenna with the router? You might consider a USB extension cable so you can place the wireless device on a windowsill: http://www.amazon.com/Belkin-USB-Ext.../dp/B00001ZWXA

    Let's have a look at:
    Code:
    iwconfig
    It seems to work little bit better with probe time increased.Should I try and increase it more?
    Sure:
    Code:
    gksudo gedit /etc/modprobe.d/mac80211.conf
    Change the 5000 part to 10000. Proofread, save and close gedit. Now do:
    Code:
    sudo modprobe -r rtl8187
    sudo modprobe -r mac80211
    sudo modprobe rtl8187
    Is txpower changeable?
    Code:
    sudo iwconfig txpower 16
    Keep increasing the number until it errors out. If it helps, we'll write a file and make it persistent.
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

  3. #23
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    Re: How to install RTL8187 driver to Ubuntu 13.04?

    Quote Originally Posted by chili555 View Post
    Is txpower changeable?
    Code:
    sudo iwconfig txpower 16
    Keep increasing the number until it errors out. If it helps, we'll write a file and make it persistent.
    I did all of the above steps,but couldn't change tx power.This could be the problem,weak signal from my Realtek!It's so frustrating the fact that it works excellent with windows,but it doesn't with Ubuntu.There are no obstacles in between two units such as houses or trees,and no microwaves too.It's a countryside Croatia where I live :-) Terminal: [QUOTE]Terminal:BD:~$[/QU
    tom@tom-HP-Compaq-nc8000-DU449EA-ABD:~$ iwconfig
    irda0 no wireless extensions.

    lo no wireless extensions.

    eth0 no wireless extensions.

    tom@tom-HP-Compaq-nc8000-DU449EA-ABD:~$ iwconfig
    irda0 no wireless extensions.

    lo no wireless extensions.

    eth0 no wireless extensions.

    wlan1 IEEE 802.11bg ESSID:"ThomsonD5E443"
    Mode:Managed Frequency:2.412 GHz Access Point: 00:24:17:grin:7:68:A7
    Bit Rate=12 Mb/s Tx-Power=20 dBm
    Retry long limit:7 RTS thr:eek:ff Fragment thr off
    Power Management off
    Link Quality=41/70 Signal level=-69 dBm
    Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
    Tx excessive retries:0 Invalid misc:42 Missed beacon:0

    tom@tom-HP-Compaq-nc8000-DU449EA-ABD:~$ sudo modprobe -r rtl8187
    [sudo] password for tom:
    tom@tom-HP-Compaq-nc8000-DU449EA-ABD:~$ sudo modprobe -r mac80211
    tom@tom-HP-Compaq-nc8000-DU449EA-ABD:~$ sudo modprobe rtl8187
    tom@tom-HP-Compaq-nc8000-DU449EA-ABD:~$ sudo modprobe mac80211
    tom@tom-HP-Compaq-nc8000-DU449EA-ABD:~$ sudo iwconfig txpower 16
    iwconfig: unknown command "16"
    tom@tom-HP-Compaq-nc8000-DU449EA-AOTE]

  4. #24
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    Re: How to install RTL8187 driver to Ubuntu 13.04?

    tom@tom-HP-Compaq-nc8000-DU449EA-ABD:~$ sudo iwconfig txpower 16
    iwconfig: unknown command "16"
    I made a mistake. I apologize for the mis-step.
    Code:
    sudo iwconfig wlan1 txpower 21
    I selected 21 because the txpower is already 20:
    wlan1 IEEE 802.11bg ESSID:"ThomsonD5E443"
    Mode:Managed Frequency:2.412 GHz Access Point: 00:24:17:grin:7:68:A7
    Bit Rate=12 Mb/s Tx-Power=20 dBm
    Retry long limit:7 RTS thr:eek:ff Fragment thr off
    Power Management off
    Link Quality=41/70 Signal level=-69 dBm
    Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
    Tx excessive retries:0 Invalid misc:42 Missed beacon:0
    Sorry about that. Please see if you can increase the power beyond 20.
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

  5. #25
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    Re:(SOLVED) How to install RTL8187 driver to Ubuntu 13.04?

    Quote Originally Posted by chili555 View Post
    I made a mistake. I apologize for the mis-step.
    Code:
    sudo iwconfig wlan1 txpower 21
    I selected 21 because the txpower is already 20:Sorry about that. Please see if you can increase the power beyond 20.
    OK,my wi-fi works very well,most of the time now.I did change power to 22,but when I recall,it's always 20.I've bought USB extension cable and moved wifi adapter to a better spot,and I've got much better reception.Thank you Chili for your time and patience.You've helped and taught me a lot,and hope others too.Now I understand much better the process how wi-fi functions,as for software.Would you please help me bring internal adapter back out of blacklist.I did turn it on with a command (I think) "modprobe ath5k" once only,but now it won't turn on with this command anymore.

  6. #26
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    Re: How to install RTL8187 driver to Ubuntu 13.04?

    Would you please help me bring internal adapter back out of blacklist.I did turn it on with a command (I think) "modprobe ath5k" once only,but now it won't turn on with this command anymore.
    If you reboot with the USB detached, then do:
    Code:
    sudo modprobe ath5k
    ...then does it work?

    You might keep bumping up the txpower to 23 or 24, etc. as an experiment.
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

  7. #27
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    Re: How to install RTL8187 driver to Ubuntu 13.04?

    Quote Originally Posted by chili555 View Post
    If you reboot with the USB detached, then do:
    Code:
    sudo modprobe ath5k
    ...then does it work?

    You might keep bumping up the txpower to 23 or 24, etc. as an experiment.
    Yes,internal works now.I didn't go higher than 22,but I did go to zero just to see what happens.When I recall it in terminal,it's always 20.Is there any other command to boost it up?I didn't measure USB voltage yet,but I think it should be standardized 5V as any other pc,or I maybe wrong?

  8. #28
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    Re: How to install RTL8187 driver to Ubuntu 13.04?

    The design of the device will prevent you from increasing the txpower to unsafe levels; or at least it is supposed to. The idea is to keep increasing from 20 to 21 to 22, etc. until you are reliably connecting to that router that is 200-yds. away. Once you know that number, we can amend one file and make it persistent.
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

  9. #29
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    Re: How to install RTL8187 driver to Ubuntu 13.04?

    Quote Originally Posted by chili555 View Post
    The design of the device will prevent you from increasing the txpower to unsafe levels; or at least it is supposed to. The idea is to keep increasing from 20 to 21 to 22, etc. until you are reliably connecting to that router that is 200-yds. away. Once you know that number, we can amend one file and make it persistent.
    for some reason it won't accept tpower change anymore regardless of wlan0 on or off
    tom@tom-HP-Compaq-nc8000-DU449EA-ABD:~$ iwconfig
    wlan0 IEEE 802.11bg ESSID:eek:ff/any
    Mode:Managed Access Point: Not-Associated Tx-Power=20 dBm
    Retry long limit:7 RTS thr:eek:ff Fragment thr:eek:ff
    Power Management:eek:ff

    irda0 no wireless extensions.

    lo no wireless extensions.

    eth0 no wireless extensions.

    wlan1 IEEE 802.11bg ESSID:"ThomsonD5E443"
    Mode:Managed Frequency:2.437 GHz Access Point: 00:24:17:grin:7:68:A7
    Bit Rate=54 Mb/s Tx-Power=20 dBm
    Retry long limit:7 RTS thr:eek:ff Fragment thr:eek:ff
    Power Management:eek:ff
    Link Quality=41/70 Signal level=-69 dBm
    Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
    Tx excessive retries:0 Invalid misc:16 Missed beacon:0

    tom@tom-HP-Compaq-nc8000-DU449EA-ABD:~$ sudo iwconfig txpower 25
    [sudo] password for tom:
    iwconfig: unknown command "25"
    tom@tom-HP-Compaq-nc8000-DU449EA-ABD:~$ sudo iwconfig txpower 23
    iwconfig: unknown command "23"
    tom@tom-HP-Compaq-nc8000-DU449EA-ABD:~$

  10. #30
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    Re: How to install RTL8187 driver to Ubuntu 13.04?

    tom@tom-HP-Compaq-nc8000-DU449EA-ABD:~$ sudo iwconfig txpower 25
    [sudo] password for tom:
    iwconfig: unknown command "25"
    tom@tom-HP-Compaq-nc8000-DU449EA-ABD:~$ sudo iwconfig txpower 23
    iwconfig: unknown command "23"
    It is actually:
    Code:
    sudo iwconfig wlan1 txpower 25
    Please try again.
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

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