Public bug reported:
System configuration:
Kubuntu 64bit 9.04
(Linux ath64 2.6.28-11-generic #42-Ubuntu SMP Fri Apr 17 01:58:03 UTC 2009
x86_64 GNU/Linux)
Hardware: MSI K9N Platinum motherboard (nVidia Nforce 570 chipset),
5 Gb DDR2-800 RAM
3 Hitachi HDDs attached over SATA2 links.
Problem description:
System boots fine but in the middle of boot there is happens nasty ~20 seconds
pause.
Investigation of dmesg log has shown this happens due to strange SATA issues.
Then kernel hard-resetting SATA link and all works fine since this point.
But it takes some extra 20 seconds or so during which system does nothing
useful, hence booting time is high enough.
More info:
I did not had this issue with eralier Ubuntus. This issue started to appear
only in Ubuntu 8.10 in some intermittent manner and with 9.04 it seems to be
stable and occurs on each boot.
This not seems to be hardware issue: it ONLY happens at boot phase and after
hard-resetting link, error no longer happens again, regardless of any disk
activity (hence, it does not looks like faulty cable or bad contact which will
cause errors in all phases of system operation). Until next reboot occurs, even
if this takes month or so.
Dmesg output is attached. Problem is reported by kernel after 41.889805
seconds mark.
Actually, this bug does not causes any noticeable harm except boot
progress stucks for 20 extra seconds doing NOTHING until SATA link is
reset. Then booting resumes without any side effects and system works
fine without any further issues related to SATA. Looks like driver
incorrectly initializes chipset in some scenarios and latest versions
contain some regression or something like this (2.6.24 and similar
kernels not seems to encounter this issue at all while with 2.6.27
sometimes happens and with 2.28 it happens virtually at each boot).
** Affects: ubuntu
Importance: Undecided
Status: New
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Slow boot times due to strange SATA errors.
https://bugs.launchpad.net/bugs/367764
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