I have the same problem very often during a day on a Lenovo ThinkCentre
M900 (see specs below).
Often this problem is preceded by Chrome tabs blinking or blacking out
but I can't be sure it is a related problem. In those cases, the only
solution is to kill Chrome and restart the application.
When Ubuntu freezes it starts with either a frozen cursor or unable to
use the cursor anywhere. Other times Ubuntu becomes very slow before
freezing.
product: 10FCS22R00 (LENOVO_MT_10FC_BU_LENOVO_FM_ThinkCentre M900)
product: 30BC
product: Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz
product: M378A1K43CB2-CRC
product: M378A1K43CB2-CRC
product: Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Host
Bridge/DRAM Registers
product: Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor PCIe
Controller (x16)
product: GK208B [GeForce GT 720]
product: GK208 HDMI/DP Audio Controller
product: 100 Series/C230 Series Chipset Family USB 3.0 xHCI
Controller
product: 100 Series/C230 Series Chipset Family MEI Controller #1
product: Q170/Q150/B150/H170/H110/Z170/CM236 Chipset SATA
Controller [AHCI Mode]
product: Q170 Chipset LPC/eSPI Controller
product: 100 Series/C230 Series Chipset Family Power Management
Controller
product: 100 Series/C230 Series Chipset Family HD Audio Controller
product: 100 Series/C230 Series Chipset Family SMBus
product: Ethernet Connection (2) I219-LM
product: SanDisk SD8SB8U5
product: DVD-RW DH16AFSH
product: BUP Slim RD
product: To Be Filled By O.E.M.
** Attachment added: "Screenshot from 2018-12-18 09-42-02.png"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1798961/+attachment/5223255/+files/Screenshot%20from%202018-12-18%2009-42-02.png
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https://bugs.launchpad.net/bugs/1798961
Title:
Random unrecoverable freezes on Ubuntu 18.10
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