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Message #168529
[Bug 1259861] Re: 5-10 second delay in kernel boot with kernel command line ip=
** Also affects: linux (Ubuntu Wily)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Xenial)
Importance: Medium
Status: Confirmed
** Also affects: linux (Ubuntu Trusty)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Trusty)
Status: New => Confirmed
** Changed in: linux (Ubuntu Wily)
Status: New => Confirmed
** Changed in: linux (Ubuntu Wily)
Importance: Undecided => Low
** Changed in: linux (Ubuntu Trusty)
Importance: Undecided => Low
** Changed in: linux (Ubuntu Xenial)
Assignee: (unassigned) => Andy Whitcroft (apw)
** Changed in: linux (Ubuntu Xenial)
Milestone: None => ubuntu-16.03
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https://bugs.launchpad.net/bugs/1259861
Title:
5-10 second delay in kernel boot with kernel command line ip=
Status in linux package in Ubuntu:
Confirmed
Status in linux source package in Trusty:
Confirmed
Status in linux source package in Wily:
Confirmed
Status in linux source package in Xenial:
Confirmed
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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References