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Message #116401
[Bug 1451277] Re: Extremely high IOWait and processes hungs after utopic->vivid upgrade
apport-collect 1451277
ERROR: Could not import module, is a package upgrade in progress? Error: No module named PyQt5.QtCore
Please do not ask things that are clearly beyond the possibilities of
kubuntu vivid after the plasma 5 transition.
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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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:
Confirmed
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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