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Tasklist

FS#51501 - [linux] Kernel 4.8 causes ATA exception Emask 0x0 [...] frozen errors on shutdown

Attached to Project: Arch Linux
Opened by Razvan Cojocaru (rc) - Saturday, 22 October 2016, 19:10 GMT
Last edited by Tobias Powalowski (tpowa) - Saturday, 21 January 2017, 05:52 GMT
Task Type Bug Report
Category Kernel
Status Closed
Assigned To Tobias Powalowski (tpowa)
Architecture x86_64
Severity Low
Priority Normal
Reported Version
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 1
Private No

Details

On a Dell Latitude E5440 laptop running an up-to-date Arch Linux, on shutdown I get an ATA exception Emask 0x0 [...] frozen error. Arch Linux is set up as LVM on LUKS, as per the Arch Wiki instructions (maybe this has something to do with it?). There's also something about 0x4 (timeout) in there. The hard drive is a Seagate SSHD. I've ran smartctl on it and it's perfectly healthy.

When I shut it down, it stalls for maybe a minute, then it spits the error out to me too fast to get it completely, then the computer shuts down with the hard drive LED blinking (this is what has attracted my attention).

The system is dual-boot with Windows - Windows works fine with no issues on shutdown. I've downgraded the kernel to the latest 4.7 kernel available, and this has solved the issue, so this doesn't appear to be a hardware issue.
This task depends upon

Closed by  Tobias Powalowski (tpowa)
Saturday, 21 January 2017, 05:52 GMT
Reason for closing:  Fixed
Comment by Marcel Huber (marcelhuberfoo) - Wednesday, 26 October 2016, 07:13 GMT
I encounter a similar situation but for me the problem is severe as the system does not startup. I also use LUKS but as container for zfs. My system is a Sony VAIO Laptop:
system SVP1321C5E
cpu@0 processor Intel(R) Core(TM) i7-4500U CPU @ 1.80GHz
scsi@0:0.0.0 /dev/sda disk 256GB SAMSUNG MZHPU256

4.7.x kernels worked fine. Curiously my business laptop (Fujitsu E754) also running zfs on LUKS, eg. almost similar configuration, runs without any issue.

I attached the bootup log showing the ata.1 errors.
   SystemdLog.jpg (0.99 MiB)
Comment by Marcel Huber (marcelhuberfoo) - Friday, 20 January 2017, 22:25 GMT
Today I luckily found this bug entry at RedHat (https://bugzilla.redhat.com/show_bug.cgi?id=1397841) which seems to address at least the problems I encountered.

In short: upgrading to a kernel >= 4.9.0 solves the problem for me. I tested today using linux-4.9.4-1 from testing.

(On the way to this bug entry I noticed this bug entry (https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1633172) which mentions the CONFIG_HARDENED_USERCOPY kernel config but as it is still defined in 4.9.x I assume it is either a combination of this setting with something else or unrelated.)

Nevertheless it would be nice to know the real cause.

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