This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:
apport-collect 1451277
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1451277
Title:
Extremely high IOWait and processes hungs after utopic->vivid upgrade
Status in linux package in Ubuntu:
Incomplete
Bug description:
On Kubuntu, 64 bit AMD Phenom2 machine with 4 cores, and old (Geoforge 7025)
Nvidia graphics.
Using LVM. Machine also has a 2 disk software raid (mirroring).
The machine was working fine before the upgrade, now it is almost
impossible to use it... I see Wait in Top always above 60%; in dmesg
after a few minutes that the machine is up even if the machine does
nothing. I see hung processes (typically vgs, but occasionally also
others). LVM related commands (e.g. lvdisplay) almost always hung at
the terminal. I also see in ps some kernel workers almost constantly
stuck in D state. Also, the machine takes ages to shutdown.
Issue remains there also if I disable X (switch off the X login
manager, sddm) and check at the console.
Sorry I cannot provide details with apport, but the machine has been
switched off and I will not be able to take it up again before a few
days from now.
The symptom I am observing may also be a sign of failing hardware, so
please leave the bug as unconfirmed until I make some more tests or
someone provide details on similar issues. In the meantime I would
like to see if others are experiencing a similar serious issue. Is
there anything specific that has changed between utopic and vivid, I
should look into?
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