Boot problem with Ubuntu (DMESG.LOG) attached / help needed please/ - Ubuntu

This is a discussion on Boot problem with Ubuntu (DMESG.LOG) attached / help needed please/ - Ubuntu ; Hi have Ubuntu 9.10 but am having a problem when my laptop boots up. Just before it gets to the circular loading graphic it just hangs, I have waited a while but it does not seem to get any further. ...

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Thread: Boot problem with Ubuntu (DMESG.LOG) attached / help needed please/

  1. Exclamation Boot problem with Ubuntu (DMESG.LOG) attached / help needed please/

    Hi have Ubuntu 9.10 but am having a problem when my laptop boots up.
    Just before it gets to the circular loading graphic it just hangs, I have waited
    a while but it does not seem to get any further.

    So I turn the power off and try again, but this time I get the GRUB boot
    loader come up so I decided to choose the “Recovery” option, this then displays the
    lines of text regarding what’s loading etc.. then it sits there for a while.

    It then displays a menu saying something like “boot as normal” and some other
    options, but I cant see what they are as the following message comes up
    over the top of it:

    [ 312.287094] ath5k phy0: noise floor calibration failed (5785MHz)

    Then every couple of seconds another line as above appears with a different number between the [ ] brackets.

    Does anyone know what this is? and if this would be causing the problem when trying to boot up
    when it just hangs.


    I did a DMESG and the log file is attached as a ZIP file, could someone have a look and let
    me know if there is a problem anywhere, as I am not sure really what I am looking for.
    ( i can see at the very end the similar "noise floor calibration failed" errors. but dont know if this
    is the problem) Also there seems to be a "big wait" between [ 7.277828] & [ 50.676290].

    Regards

    Mark
    Attached Files

  2. Re: Boot problem with Ubuntu (DMESG.LOG) attached / help needed please/

    I have tried booting in Recovery mode from the Grub Menu, but
    it just halts. I have attached a screenshot of the boot up screen.

    The screen just stays at this point and does not progress, so I end
    up having to reboot again and again.

    Anyone got any ideas?
    Attached Images

  3. Re: Boot problem with Ubuntu (DMESG.LOG) attached / help needed please/

    Think I have worked out what is causing the problem. My video sender for my TV
    (sending Sky from downstairs to the tv in my bedroom), works on the following frequencies:

    (channel 1) = 5745Mhz
    (channel 2) = 5765Mhz
    (channel 3) = 5785Mhz
    (channel 4) = 5805Mhz.


    So when I look at my DMESG.LOG I can see the Noise floor calibration errors changing to which
    ever frequency I change the Video sender to.

    The snippet of my DMESG.LOG file below shows in the 1st part
    the frequencies that my wireless card uses, as you can see
    the frequencies are right where my Video Senders
    frequencies are.

    Also the last part below shows the "noise floor calibration"
    fails for the frequencies as I change through the 4 available
    frequency channels that I have on my video sender.

    ----snippet of DMESG.LOG-----

    [ 48.074614] (start_freq - end_freq @ bandwidth), max_antenna_gain, max_eirp)
    [ 48.074619] (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi,2000 mBm)
    [ 48.074623] (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi,2000 mBm)
    [ 48.074627] (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi,2000 mBm)
    [ 48.074631] (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi,2000 mBm)
    [ 48.074635] (5735000 KHz - 5835000 KHz @ 40000 KHz),(300 mBi,2000 mBm)
    .
    .
    .
    .
    [ 663.295601] ath5k phy0: noise floor calibration failed (5745MHz)
    [ 783.603538] ath5k phy0: noise floor calibration failed (5765MHz)
    [ 1024.167787] ath5k phy0: noise floor calibration failed (5785MHz)
    [ 1264.591521] ath5k phy0: noise floor calibration failed (5805MHz)


    ----snippet of DMESG.LOG-----


    I guess I will have to turn off the Video senders everytime I boot up the laptop, wait until I am into the OS and then turn them back on.

    Unless there is a way I can stop the wireless card in the Laptop from using a specified range of frequencies?
    Does anyone know if this is possible and can tell
    me how to do this.

    Regards

    Mark

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