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Laptop is having both wired and wireless connectivity issues

Tags:
  • Wireless
  • Connectivity
  • DNS
  • Internet
  • Wireless Network
  • Modem
Last response: in Wireless Networking
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December 15, 2013 3:51:02 PM

The past few days have been very hard. The internet's been on and off, and windows diagnostics say that I have DNS problems or nothing at all. I have comcast internet. I've tried many things to fix it, such as using public DNS servers and power cycling the modem. I have a model SBG6850 as a modem-router. I believe that this is only occurring on this one laptop. This is the current status of it.


Specs:

  • Model SBG6850
  • LAN adapter - Killer e2200 PCI-E Gigabit Ethernet Controller (NDIS 6.20)
  • Wireless adapter - Killer Wireless-N 1103 Network Adapter
  • Network splitter for cables, 2 -3.5dB output and 1 input
  • Windows 7 64bit home

  • Here are the things I've already tried.

    • 4 cmd lines: (ipconfig/flushdns, /renewdns, /releasedns, and something else)
    • powercycling the modem
    • using public dns servers
    • running namebench
    • right-clicking and using the "diagnose button" (it either says that I'm configured correctly but the DNS server is bad, or that nothing is detected)
    • using KillerCleaner (apparently it deleted the drivers for my Killer devices, but I already had the driver pack from Killer downloaded and ready to install, so that was a close call)
    • reinstalling killer drivers
    • using a different ethernet cable
    • restarting my computer
    • unplugging the cables and the splitter


  • I have no idea what the downstream bonded channels are, but I feel like they may be part of te problem.
    Any help would be extremely appreciated, as this has been bugging me and getting in the way of a lot of things. Thanks in advance!
  • More about : laptop wired wireless connectivity issues

    Best solution

    December 18, 2013 10:51:12 AM

    Stil some more tests to do:
    Take your laptop to some other site , friend, family, work... If it will work there, most probably modem/provider/cable/splitter problem.
    If handy, try to boot up any live linux distribution. If it will work, could be a problem with windows.

    However, according some reports and articles, you may have "to loud" Upstream or at least at near to upper border limit (52,7 54 dbmV). SNR seems is not to bad. Slightly higher value would be, let say, more safe.
    Read this http://www.dslreports.com/faq/3412 article but also read coments down there.
    Hope this may help to right direction.
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    December 19, 2013 1:14:01 PM

    I forgot to update here; apparently the firmware changed back to what it was before an update, and the DNS problem didn't happen anymore. I guess it was on Motorola/Comcast's side. I still appreciate all the answers!
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    December 19, 2013 10:35:02 PM

    Glad you solved this.
    I recomend to make new "snapshot" of modem status as one above , just for future reference.
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    !