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Message #33767
[Bug 1259861] Re: 5-10 second delay in kernel boot
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v3.12 kernel[0].
If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.
If the mainline kernel does not fix this bug, please add the tag:
'kernel-bug-exists-upstream'.
If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".
Thanks in advance.
[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.13-rc3-trusty/
** Changed in: linux (Ubuntu)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/1259861
Title:
5-10 second delay in kernel boot
Status in “linux” package in Ubuntu:
Incomplete
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