Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?
Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.2 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'. 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/v4.2-unstable/ ** Changed in: linux (Ubuntu) Importance: Undecided => Medium -- 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/1491424 Title: [Packard Bell EasyNote ENTF71BM] System will hang on reboot / poweroff Status in linux package in Ubuntu: Incomplete Bug description: Seems similar to https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1341925 and https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1346269 System will hang at dw_dmac INTL9C60:00: invalid resource Adding the following to /etc/modprobe.d/blacklist.conf bypasses the issue and the laptop works without issue: blacklist dw_dmac blacklist dw_dmac_core Version: Ubuntu 3.19.0-15.15-generic 3.19.3 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1491424/+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
