This bug affects me as well (both Ubuntu 18.04.3 LTS and Linux Mint 19.2 Tina on multi boot system)
On Ubuntu and Mint it started on kernel upgrade from: Linux version 4.15.0-65-generic - No Errors To Linux version 4.15.0-66-generic - Errors started! Latest kernel at this time: Linux version 4.15.0-70-generic - Also shows errors! System: Host: Inspiron-3847 Kernel: 4.15.0-70-generic x86_64 Desktop: Gnome 3.28.4 (Gtk 3.22.30) info: gnome-shell dm: gdm3 Distro: Ubuntu 18.04.3 LTS Machine: Device: desktop System: Dell product: Inspiron 3847 Mobo: Dell model: 088DT1 v: A01 UEFI: Dell v: A10 date: 05/10/2018 Chassis: type: 3 CPU: Quad core Intel Core i5-4460 (-MCP-) arch: Haswell rev.3 cache: 6144 KB Graphics: Card: Intel Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller Display Server: x11 (X.Org 1.19.6 ) driver: i915 Resolution: 1920x1080@60.00hz OpenGL: renderer: Mesa DRI Intel Haswell Desktop version: 4.5 Mesa 19.0.8 (compat-v: 3.0) Direct Render: Yes -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1849713 Title: Warning message in logs after kernel update to linux- image-4.15.0-66-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1849713/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs