I tested using the kernel from http://kernel.ubuntu.com/~kernel-
ppa/mainline/v3.12-trusty/
I'm still getting the same errors in dmesg, triggered by running apt-get
upgrade:
[ 329.070415] ata3.00: exception Emask 0x0 SAct 0x1 SErr 0x4 action 0x6
frozen
[ 329.070423] ata3: SError: {
VS, the next step is to fully commit bisect from the release prior to
Precise that this problem didn't happen with, to Precise in order to
identify the offending commit.
Could you please do this following
https://wiki.ubuntu.com/Kernel/KernelBisection ?
** Changed in: linux (Ubuntu)
VS, as per http://download.lenovo.com/express/ddfm.html an update is
available for your BIOS (2.30). If you update to this following
https://help.ubuntu.com/community/BiosUpdate , does it change anything?
If not, could you please both specify what happened, and provide the output of
the
Upgraded to the latest BIOS, bug still present.
Here's what I did:
1. echo min_power |sudo tee
/sys/class/scsi_host/host*/link_power_management_policy
2. Provoked disk activity by starting Firefox. Everything hangs for a while,
messages in dmesg pasted below.
3. Returned to normal operation
VS, could you please test the latest upstream kernel available (not the daily
folder) following https://wiki.ubuntu.com/KernelMainlineBuilds ? Once you've
tested the upstream kernel, please comment on which kernel version specifically
you tested. If this bug is fixed in the mainline kernel,
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