I also have had random system freezes ever since I upgraded from 18.04 to 18.10, Linux 4.18.0-10-generic, solved by always booting into 4.15.0-36-generic. When the freezes happen, the screen simply stops, and no input is accepted, not even the usual REISUB.
teresaejunior@laptop ~> inxi -Fz System: Host: laptop Kernel: 4.15.0-36-generic x86_64 bits: 64 Desktop: Xfce 4.13.2 Distro: Ubuntu 18.10 (Cosmic Cuttlefish) Machine: Type: Laptop System: LENOVO product: 80JE v: Lenovo G40-80 serial: <filter> Mobo: LENOVO model: Lancer 4A1 v: SDK0E50515 STD serial: <filter> UEFI: LENOVO v: B0CN79WW date: 05/07/2015 Battery: ID-1: BAT0 charge: 26.4 Wh condition: 26.4/28.5 Wh (93%) CPU: Topology: Dual Core model: Intel Core i5-5200U bits: 64 type: MT MCP L2 cache: 3072 KiB Speed: 1397 MHz min/max: 500/2700 MHz Core speeds (MHz): 1: 1146 2: 1000 3: 1079 4: 1039 Graphics: Device-1: Intel HD Graphics 5500 driver: i915 v: kernel Display: x11 server: X.Org 1.20.1 driver: modesetting unloaded: fbdev,vesa resolution: 1366x768~60Hz OpenGL: renderer: Mesa DRI Intel HD Graphics 5500 (Broadwell GT2) v: 4.5 Mesa 18.2.2 Audio: Device-1: Intel Broadwell-U Audio driver: snd_hda_intel Device-2: Intel Wildcat Point-LP High Definition Audio driver: snd_hda_intel Sound Server: ALSA v: k4.15.0-36-generic Network: Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet driver: r8169 IF: enp2s0 state: down mac: <filter> Device-2: Qualcomm Atheros QCA9565 / AR9565 Wireless Network Adapter driver: ath9k IF: wlp3s0 state: up mac: <filter> Device-3: Atheros AR3012 Bluetooth 4.0 type: USB driver: btusb IF-ID-1: docker0 state: down mac: <filter> Drives: Local Storage: total: 931.51 GiB used: 411.53 GiB (44.2%) ID-1: /dev/sda vendor: Seagate model: ST1000LM024 HN-M101MBB size: 931.51 GiB Partition: ID-1: / size: 915.71 GiB used: 411.52 GiB (44.9%) fs: ext4 dev: /dev/sda2 Sensors: System Temperatures: cpu: 41.0 C mobo: N/A Fan Speeds (RPM): N/A Info: Processes: 267 Uptime: 7h 12m Memory: 11.64 GiB used: 3.45 GiB (29.7%) Shell: fish inxi: 3.0.24 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1798961 Title: Random unrecoverable freezes on Ubuntu 18.10 Status in linux package in Ubuntu: Triaged Status in linux source package in Bionic: Triaged Status in linux source package in Cosmic: Triaged Status in linux source package in Disco: Triaged Bug description: First thing I notice is that the mouse cursor freezes as I'm using it, then I hit the CAPS LOCK key and the LED indicator doesn't respond. Then I try the "REISUB" command, but it doesn't do anything either. Only a hard reset works, pressing down the power button for a few seconds. How to reproduce? I couldn't figure out a consistent method. It is still random to me. Version: Ubuntu 4.18.0-10.11-generic 4.18.12 System information attached. Also happens under Arch Linux and Fedora. I've talked to another user on IRC who seems to be having the same freezes. ProblemType: Bug DistroRelease: Ubuntu 18.10 Package: linux-image-4.18.0-10-generic 4.18.0-10.11 ProcVersionSignature: Ubuntu 4.18.0-10.11-generic 4.18.12 Uname: Linux 4.18.0-10-generic x86_64 ApportVersion: 2.20.10-0ubuntu13 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: dsilva 1213 F.... pulseaudio /dev/snd/controlC0: dsilva 1213 F.... pulseaudio CurrentDesktop: XFCE Date: Sat Oct 20 09:54:50 2018 InstallationDate: Installed on 2018-10-20 (0 days ago) InstallationMedia: Xubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.2) MachineType: Dell Inc. Inspiron 5458 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.18.0-10-generic root=/dev/mapper/xubuntu--vg-root ro quiet splash vt.handoff=1 RelatedPackageVersions: linux-restricted-modules-4.18.0-10-generic N/A linux-backports-modules-4.18.0-10-generic N/A linux-firmware 1.175 RfKill: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 02/02/2018 dmi.bios.vendor: Dell Inc. dmi.bios.version: A15 dmi.board.name: 09WGNT dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA15:bd02/02/2018:svnDellInc.:pnInspiron5458:pvr01:rvnDellInc.:rn09WGNT:rvrA00:cvnDellInc.:ct9:cvr: dmi.product.name: Inspiron 5458 dmi.product.sku: Inspiron 5458 dmi.product.version: 01 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1798961/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp