Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.0 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/v4.1-rc2-vivid/ ** Changed in: linux (Ubuntu) Importance: Undecided => Medium ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- 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 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
