I have tried to look into the issue, but I am encountering a situation that is extremely weird. Hence I hope that someone might be able to help.
The latest kernel that works from the ubuntu mainline ppa repo is 3.16.7-031607_3.16.7-031607.201410301735 Kernel 3.17.0-031700_3.17.0-031700.201410060605 already shows the issue. However, if I try to compile myself 3.17 from Linus following the instructions in https://wiki.ubuntu.com/KernelTeam/GitKernelBuild I get: - a kernel that is clearly completely different in configuration from that in the ubuntu ppa mainline (different package names, much much larger kernel image package) and, most important, - a kernel that apparently does not show the IOWAIT issue. At the same time, I am recently experiencing all sort of issues with nvidia 304 and kde plasma 5 causing continuous hangs in plasmashell even if compositing is off, so it is quite difficult to properly test for me. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1451277 Title: Extremely high IOWait and processes hungs after utopic->vivid upgrade with Iomega Zip drive (IDE) 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? To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1451277/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
