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Re: Strange cabled network fault when rebooting from Windows (any version) into Ubuntu 24

From	VanguardLH <V@nguard.LH>
Newsgroups	alt.os.linux, uk.comp.os.linux, alt.comp.microsoft.windows, alt.comp.os.windows-11
Subject	Re: Strange cabled network fault when rebooting from Windows (any version) into Ubuntu 24
Date	2025-11-15 11:27 -0600
Organization	Usenet Elder
Message-ID	<1uhte73xfafda$.dlg@v.nguard.lh> (permalink)
References	<10fa3bb$3i62r$1@dont-email.me>

Cross-posted to 4 groups.

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Java Jive <java@evij.com.invalid> wrote:

> In case it's helpful to anyone else ...
> 
> I have some Dell Precision M6800s & M6700s dual-booting via Grub between 
> various versions of Windows and Ubuntu 24, all cabled to the LAN.  If I 
> choose to move between any version of Windows and Ubuntu by rebooting, 
> Ubuntu 24 cannot make a reliable cabled LAN connection, it keeps trying 
> to connect but never succeeds.  However, if I choose to move between any 
> version of Windows and Ubuntu by shutting down the PC in between, Ubuntu 
> 24 'just works', no networking problem at all.  Reboot from U24 and go 
> back into U24, the situation is unchanged  -  if it was working before 
> the reboot, it's working now, if it wasn't working before the reboot, it 
> isn't working now.  Reboot from U24 and go back into Windows, no network 
> problems in Windows at all.  Reboot from Windows and go back into any 
> version of Windows, no network problems at all.
> 
> In summary, when rebooting ...
>      Ubuntu 24 -> Ubuntu 24    No change
>      Ubuntu 24 -> Windows      No problem
>      Windows -> Ubuntu 24      U24 cannot make cabled LAN connection
>      Windows -> Windows        No problem
> 
> It seems to me from this that the cabled network hardware is not being 
> properly initialised when booting Ubuntu 24.  The cure is simply to 
> actually power down the PC before launching Ubuntu 24

Don't know what are the "networking problems".  In each scenario, can
you connect to the internal web server in the cable modem, router, or
whatever you have upstream of the problematic host?  Check if you can do
intranet connections before testing if you can get to the Internet.

Does the upstream web server (cable modem, router) report the same MAC
each time you reboot?  When you have network problems, does it even see
the MAC address for your problematic host?  I'm wondering if outside
your problematic host if anything else sees it.

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Thread

Strange cabled network fault when rebooting from Windows (any version) into Ubuntu 24 Java Jive <java@evij.com.invalid> - 2025-11-15 14:39 +0000
  Re: Strange cabled network fault when rebooting from Windows (any version) into Ubuntu 24 Andy Burns <usenet@andyburns.uk> - 2025-11-15 15:04 +0000
    Re: Strange cabled network fault when rebooting from Windows (any version) into Ubuntu 24 Java Jive <java@evij.com.invalid> - 2025-11-15 15:17 +0000
      Re: Strange cabled network fault when rebooting from Windows (any  version) into Ubuntu 24 vallor <vallor@vallor.earth> - 2025-11-15 16:17 +0000
        Re: Strange cabled network fault when rebooting from Windows (any version) into Ubuntu 24 Java Jive <java@evij.com.invalid> - 2025-11-15 17:19 +0000
          Re: Strange cabled network fault when rebooting from Windows (any version) into Ubuntu 24 VanguardLH <V@nguard.LH> - 2025-11-15 11:56 -0600
  Re: Strange cabled network fault when rebooting from Windows (any version) into Ubuntu 24 Dan Purgert <dan@djph.net> - 2025-11-15 17:27 +0000
    Re: Strange cabled network fault when rebooting from Windows (any version) into Ubuntu 24 Java Jive <java@evij.com.invalid> - 2025-11-15 17:51 +0000
    Re: Strange cabled network fault when rebooting from Windows (any version) into Ubuntu 24 Anssi Saari <anssi.saari@usenet.mail.kapsi.fi> - 2025-11-15 23:43 +0200
      Re: Strange cabled network fault when rebooting from Windows (any version) into Ubuntu 24 VanguardLH <V@nguard.LH> - 2025-11-15 20:18 -0600
        Re: Strange cabled network fault when rebooting from Windows (any version) into Ubuntu 24 Anssi Saari <anssi.saari@usenet.mail.kapsi.fi> - 2025-11-17 12:14 +0200
          Disable FastBoot  (was: Strange cabled network fault when rebooting from Windows (any version) into Ubuntu 24) VanguardLH <V@nguard.LH> - 2025-11-17 06:19 -0600
            Re: Disable FastBoot Frank Slootweg <this@ddress.is.invalid> - 2025-11-17 16:51 +0000
              Re: Disable FastBoot Anssi Saari <anssi.saari@usenet.mail.kapsi.fi> - 2025-11-19 11:11 +0200
            Re: Disable FastBoot "Carlos E.R." <robin_listas@es.invalid> - 2025-11-17 19:24 +0100
              Re: Disable FastBoot Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-18 04:44 +0000
                Re: Disable FastBoot "Carlos E.R." <robin_listas@es.invalid> - 2025-11-18 07:08 +0100
          Re: Strange cabled network fault when rebooting from Windows (any version) into Ubuntu 24 Paul <nospam@needed.invalid> - 2025-11-17 07:23 -0500
          Re: Strange cabled network fault when rebooting from Windows (any version) into Ubuntu 24 "Carlos E.R." <robin_listas@es.invalid> - 2025-11-18 01:23 +0100
        Re: Strange cabled network fault when rebooting from Windows (any version) into Ubuntu 24 "Carlos E.R." <robin_listas@es.invalid> - 2025-11-17 12:36 +0100
          Disable FastBoot (was: Strange cabled network fault when rebooting from Windows (any version) into Ubuntu 24) VanguardLH <V@nguard.LH> - 2025-11-17 06:26 -0600
            Re: Disable FastBoot "Carlos E.R." <robin_listas@es.invalid> - 2025-11-17 19:58 +0100
            Re: Disable FastBoot (was: Strange cabled network fault when rebooting from Windows (any version) into Ubuntu 24) Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-18 04:47 +0000
              Re: Disable FastBoot "Carlos E.R." <robin_listas@es.invalid> - 2025-11-18 07:32 +0100
                Re: Disable FastBoot Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-18 07:31 +0000
  Re: Strange cabled network fault when rebooting from Windows (any version) into Ubuntu 24 VanguardLH <V@nguard.LH> - 2025-11-15 11:27 -0600
    Re: Strange cabled network fault when rebooting from Windows (any version) into Ubuntu 24 Java Jive <java@evij.com.invalid> - 2025-11-15 18:00 +0000
      Re: Strange cabled network fault when rebooting from Windows (any version) into Ubuntu 24 VanguardLH <V@nguard.LH> - 2025-11-15 20:06 -0600
  Re: Strange cabled network fault when rebooting from Windows (any version) into Ubuntu 24 Simon <invalid@invalid.invalid> - 2025-11-15 19:15 +0000
    Re: Strange cabled network fault when rebooting from Windows (any version) into Ubuntu 24 Java Jive <java@evij.com.invalid> - 2025-11-15 23:26 +0000
  Re: Strange cabled network fault when rebooting from Windows (any version) into Ubuntu 24 "Carlos E.R." <robin_listas@es.invalid> - 2025-11-15 20:43 +0100
    Re: Strange cabled network fault when rebooting from Windows (any version) into Ubuntu 24 Java Jive <java@evij.com.invalid> - 2025-11-21 20:41 +0000

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