Linux system very slow shutdown and reboot

[mdmarmer]

about 1-2 min to shutdown or reboot
Kernel 4.8.1 SSD drive
Here is start of messages
ata 2.00: exception emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
ata 2.00: cmd a0/00:00:00:08:00/00:00:00:00:00:00/a0 tag 27 pio 16327 in
Get event notification 4a 01 00 00 10 00 00 00 08 00res 40/00:00:00:00/00:00:00:00/00 Emask 0x4 (timeout)
ata 2.00: status ( DRDY ) ata 2.00: revalidation failed (errno=-5)
Machine is stock Dell i5 optiplex 9020 about 1-1/2 yrs old -- case and fan are clean inside, connections are tight, disk (short) test shows OK,
Windows shuts down normally
I think problem started about a month ago

[towo]

Find out, what's connected to that SATA port. Check the cable and the Hardware on that port.

[mdmarmer]

I checked all the connections and ran a couple of disk and system checks -- nothing wrong.  I had 4.8 kernel installed.  I installed 4.0 kernel (probably i didn't need to go that far back -- maybe I could try 4.5 or 4.6 later) and all is OK, I have normal shutdown and reboot with no unusual messages.

[mdmarmer]

 fixed in kernel patch  https://bugzilla.kernel.org/show_bug.cgi?id=187061
https://bugzilla.kernel.org/show_bug.cgi?id=151631

[piper]

I am affected by this also, earlier kernel is good, latest is very slow to boot/reboot/shutdown

Code Select Expand

inxi -F
System:    Host: x1 Kernel: 4.9.0-towo.1-siduction-amd64 x86_64 (64 bit) Desktop: KDE Plasma 5.8.4
           Distro: siduction 16.1.0 Patience - kde - (201612090919)
Machine:   Device: desktop Mobo: Gigabyte model: GA-970A-UD3 v: x.x BIOS: Award v: F7 date: 10/22/2012
CPU:       Triple core AMD FX-6300 Six-Core (-HT-MCP-) cache: 6144 KB
           clock speeds: max: 3500 MHz 1: 1400 MHz 2: 1400 MHz 3: 1400 MHz 4: 3000 MHz 5: 2000 MHz 6: 1400 MHz
Graphics:  Card: NVIDIA GM204 [GeForce GTX 970]
           Display Server: X.Org 1.19.0 driver: nvidia Resolution: 1920x1080@60.00hz
           GLX Renderer: N/A GLX Version: N/A
Audio:     Card-1 NVIDIA GM204 High Definition Audio Controller driver: snd_hda_intel
           Card-2 Advanced Micro Devices [AMD/ATI] SBx00 Azalia (Intel HDA) driver: snd_hda_intel
           Sound: Advanced Linux Sound Architecture v: k4.9.0-towo.1-siduction-amd64
Network:   Card: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller driver: r8169
           IF: enp4s0 state: up speed: 1000 Mbps duplex: full mac: 90:2b:34:a5:99:2d
Drives:    HDD Total Size: 8001.6GB (32.2% used)
           ID-1: /dev/sda model: Hitachi_HDS72202 size: 2000.4GB
           ID-2: /dev/sdb model: ST3000DM001 size: 3000.6GB
           ID-3: /dev/sdc model: ST3000DM001 size: 3000.6GB
Partition: ID-1: / size: 198G used: 49G (27%) fs: ext4 dev: /dev/sda3
           ID-2: swap-1 size: 4.29GB used: 0.00GB (0%) fs: swap dev: /dev/sda1
Sensors:   System Temperatures: cpu: 19.4C mobo: N/A gpu: 34C
           Fan Speeds (in rpm): cpu: N/A
Info:      Processes: 232 Uptime: 22:55 Memory: 4488.4/16035.4MB Client: Shell (bash) inxi: 2.3.5