This issue appears to be an upstream bug, since you tested the latest upstream kernel. Would it be possible for you to open an upstream bug report[0]? That will allow the upstream Developers to examine the issue, and may provide a quicker resolution to the bug.
Please follow the instructions on the wiki page[0]. The first step is to email the appropriate mailing list. If no response is received, then a bug may be opened on bugzilla.kernel.org. Once this bug is reported upstream, please add the tag: 'kernel-bug- reported-upstream'. [0] https://wiki.ubuntu.com/Bugs/Upstream/kernel ** Changed in: linux (Ubuntu Zesty) Status: Confirmed => Triaged ** Changed in: linux (Ubuntu) Status: Confirmed => Triaged -- 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/1687130 Title: NFS client input/output-error on kernel >=4.9 Status in linux package in Ubuntu: Triaged Status in linux source package in Zesty: Triaged Bug description: I'm experiencing input/output errors on mounting NFS-shares, starting from kernel 4.9 and above. No errors logged to syslog, but the system reports IO-errors when reading from the mount after only a few seconds. Doesn't matter which program that are accessing the disk. My problems started after upgrading to ubuntu 17.04, but I have narrowed it down to being present from ubuntu kernel 4.9 and above by installing kernels from the ubuntu kernel ppa - i.e. when downgrading to latest 4.8-kernel from the PPA, NFS starts working as expected even on ubuntu 17.04. So it's definetely kernel related. Probably not a hardware error either as the bug is present when NFS is mounted over both eth0 and wlan0. Only special thing in my setup is that NFS is mounted over an ssh- tunnel. The NFS server runs an completely up to date ubuntu 16.04 LTS install. --- ApportVersion: 2.20.4-0ubuntu4 Architecture: amd64 CurrentDesktop: Unity:Unity7 DistroRelease: Ubuntu 17.04 EcryptfsInUse: Yes InstallationDate: Installed on 2014-08-11 (991 days ago) InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2) Package: linux (not installed) Tags: zesty Uname: Linux 4.8.17-040817-generic x86_64 UnreportableReason: The running kernel is not an Ubuntu kernel UpgradeStatus: Upgraded to zesty on 2017-04-16 (12 days ago) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo vboxusers _MarkForUpload: True To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1687130/+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
