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[Bug 1259861] Re: 5-10 second delay in kernel boot with kernel command line ip=


$ for d in karmic lucid maverick natty oneiric precise quantal raring saucy trusty utopic vivid wily xenial; do
    echo "$d: $(wget -q http://kernel.ubuntu.com/~kernel-ppa/configs/$d/i386-config.flavour.generic -O - | grep -w CONFIG_IP_PNP)"

natty: # CONFIG_IP_PNP is not set
oneiric: # CONFIG_IP_PNP is not set
precise: # CONFIG_IP_PNP is not set
quantal: # CONFIG_IP_PNP is not set
raring: CONFIG_IP_PNP=y
saucy: CONFIG_IP_PNP=y
trusty: CONFIG_IP_PNP=y
utopic: CONFIG_IP_PNP=y
vivid: CONFIG_IP_PNP=y

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  5-10 second delay in kernel boot with kernel command line ip=

Status in linux package in Ubuntu:
  Fix Committed
Status in linux source package in Trusty:
Status in linux source package in Wily:
Status in linux source package in Xenial:
  Fix Committed

Bug description:
  In Trusty I see a big delay while the kernel boots that I did not see back in Precise.
  Some people have been experiencing this in Saucy too, so I don't know exactly when it started happening.
  Excerpt from dmesg:
  [    3.740100] Switched to clocksource tsc
  [   14.208118] PM: Hibernation image not present or could not be loaded.
  [   14.208885] Freeing unused kernel memory: 864K (c19ac000 - c1a84000)

  The exact messages above don't matter, they are different on different boots or on different machines.
  It even happens with e.g. 
  $ sudo kvm -m 768 -cdrom trusty-desktop-i386.iso

  My current kernel is
  Linux server 3.12.0-7-generic #15-Ubuntu SMP Sun Dec 8 23:42:09 UTC 2013 i686 i686 i686 GNU/Linux
  ...but the exact version, maybe from 3.8 to 3.12+, shouldn't matter, just run `dmesg` yourself and check if there's a big delay there.

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