The kernel unexpectedly returning EINVAL for I/O is not something new unfortunately, I saw it in a few dpkg related bug reports too: https://bugs.launchpad.net/ubuntu/+source/linux-lts-backport-natty/+bug/827942 https://bugs.launchpad.net/ubuntu/+source/tzdata/+bug/773850
The kernel unexpectedly returning EINVAL for I/O is not something new unfortunately, I saw it in a few dpkg related bug reports too: https:/ /bugs.launchpad .net/ubuntu/ +source/ linux-lts- backport- natty/+ bug/827942 /bugs.launchpad .net/ubuntu/ +source/ tzdata/ +bug/773850
https:/