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Re: Urgent help needed - Debian boot hangs

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On 01/06/2017 09:57 AM, hans@hanswkraus.com wrote:
>
> Am 06.01.2017 15:45, schrieb Dan Ritter:
>
>> On Fri, Jan 06, 2017 at 03:32:01PM +0100, hans@hanswkraus.com
>> <mailto:hans@hanswkraus.com> wrote:
>>> Hi,
>>>
>>> urgent help needed. After adding an iptable entry for masquerading my
>>> local network and making it permanent with
>>> the package "iptables-persistent" my Debian server doesn't boot any
>>> more.
>>> It hangs with the line:
>>> A start job is running for LSB: Raise network interfaces. ( ... /no
>>> limit)
>>> The root file system where it boots from is on an Adaptec HW Raid
>>> interface, the motherboard is a Asrock.
>>>
>>> I habe tried to boot from a live CD (by pressing F11 as the short boot
>>> msg of the motherboard suggests), but with no avail,
>>> the boot menue doesn't appear. I don't see the Grub menue, the screen is
>>> momentarily blank.
>>> The computer insists on booting from the Adaptec.
>>>
>>> Is there any chance to interrupt the booting process? The other command
>>> windows (Alt-F2 .. Alt-F6) show only the line
>>> A start job is running for LSB: Raise network interfaces. ( ... /no
>>> limit)
>>
>> When you boot normally, do you get a GRUB menu flashing by? If
>> so, you can interrupt it there (try down-arrow) and edit the
>> boot line to change the init system to init=/bin/sh
>>
>> Then you can mount your root filesystem r/w
>> mount -o remount,rw /
>> and edit your iptables troubles away.
>>
>> -dsr-
>>
> Hi Dan,
>
> tanks for the help but I don't see a GRUB menu. Maybe it's there because I get
> an info
> from the screen: frequency out of range... After a dew seconds the system
> beeps once
> and continues booting.
>

This is where your initial problem is.  Apparently your monitor can't sync to
the resolution your system is using during boot.  If you can try another monitor
that might have a better sync range.  Maybe try to jump into the bios setup and
see if there are any options that would affect the video resolution like setting
a generic VGA mode.  I've had this happen but I have been able to ssh into the
machine after it boots to try different grub options.
 
>
> Kind regards,
> Hans
>
>  




*...Bob*

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Urgent help needed - Debian boot hangs hans@hanswkraus.com - 2017-01-06 15:40 +0100
  Re: Urgent help needed - Debian boot hangs Dan Ritter <dsr@randomstring.org> - 2017-01-06 15:50 +0100
    Re: Urgent help needed - Debian boot hangs hans@hanswkraus.com - 2017-01-06 16:00 +0100
      Re: Urgent help needed - Debian boot hangs Bob Weber <bobrweber@gmail.com> - 2017-01-06 16:40 +0100
      Re: Urgent help needed - Debian boot hangs Dan Ritter <dsr@randomstring.org> - 2017-01-06 17:20 +0100
  Re: Urgent help needed - Debian boot hangs Henning Follmann <hfollmann@itcfollmann.com> - 2017-01-06 16:00 +0100
  Re: Urgent help needed - Debian boot hangs David Wright <deblis@lionunicorn.co.uk> - 2017-01-06 18:20 +0100
    Re: Urgent help needed - Debian boot hangs hans@hanswkraus.com - 2017-01-06 20:20 +0100
      Re: Urgent help needed - Debian boot hangs Michael Biebl <biebl@debian.org> - 2017-01-06 21:20 +0100
        Re: Urgent help needed - Debian boot hangs hans@hanswkraus.com - 2017-01-06 22:00 +0100
          More info, still urgent :-)  [was: Re: Urgent help needed - Debian  boot hangs] hans@hanswkraus.com - 2017-01-08 11:00 +0100
            Re: More info, still urgent :-)  [was: Re: Urgent help needed - Debian boot hangs] deloptes <deloptes@gmail.com> - 2017-01-08 11:20 +0100
            Re: More info, still urgent :-)  [was: Re: Urgent help needed - Debian boot hangs] Lisi Reisz <lisi.reisz@gmail.com> - 2017-01-08 13:10 +0100
              [´Solved] Re: More info, still urgent :-)  [was: Re: Urgent help needed - Debian boot hangs] Lisi Reisz <lisi.reisz@gmail.com> - 2017-01-08 14:10 +0100

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