** Package changed: ubuntu => linux (Ubuntu) ** Tags added: focal
-- 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/1871411 Title: Upgrading 18.04 to 20.04 Causes Fan to run at maximum after resume from suspend ... Status in linux package in Ubuntu: Incomplete Bug description: In brief, I upgraded Kubuntu 18.04 to 20.04 Beta. STEPS TO REPRODUCE 1. Sleep/Suspend System 2. Resuming from Suspend can cause cooling fan to run at maximum. I have a vague memory that this is a recurring issue with certain systems and has been dealt with elsewhere. And it would appear that this bug has come back to life in the latest kernel. WORKAROUND: 1. Sleep/Suspend System and Resume again. (This may have to be done once or twice. Only occasionally do I need to completely restart.) 2. Revert to older kernel. In my case I reverted to 4.18.5-041805-generic and the bug has gone away. Tried reverting to a more recent kernel 5.2, but the bug persisted. System: Host: ThinkPad Kernel: 5.4.0-21-generic x86_64 bits: 64 Desktop: KDE Plasma 5.18.3 Distro: Ubuntu 20.04 LTS (Focal Fossa) Machine: Type: Laptop System: LENOVO product: 20HF0012US v: ThinkPad T470s serial: <superuser/root required> Mobo: LENOVO model: 20HF0012US v: SDK0J40697 WIN serial: <superuser/root required> UEFI: LENOVO v: N1WET31W (1.10 ) date: 04/17/2017 Battery: ID-1: BAT0 charge: 21.6 Wh condition: 22.0/23.5 Wh (94%) ID-2: BAT1 charge: 21.4 Wh condition: 21.7/26.3 Wh (82%) CPU: Topology: Dual Core model: Intel Core i5-7300U bits: 64 type: MT MCP L2 cache: 3072 KiB Speed: 800 MHz min/max: 400/3500 MHz Core speeds (MHz): 1: 792 2: 830 3: 809 4: 822 Graphics: Device-1: Intel HD Graphics 620 driver: i915 v: kernel Display: x11 server: X.Org 1.20.7 driver: modesetting unloaded: fbdev,vesa resolution: 1920x1080~60Hz OpenGL: renderer: Mesa Intel HD Graphics 620 (KBL GT2) v: 4.6 Mesa 20.0.2 Audio: Device-1: Intel Sunrise Point-LP HD Audio driver: snd_hda_intel Sound Server: ALSA v: k5.4.0-21-generic Network: Device-1: Intel Ethernet I219-LM driver: e1000e IF: enp0s31f6 state: down mac: c8:5b:76:e3:99:5b Device-2: Intel Wireless 8265 / 8275 driver: iwlwifi IF: wlp58s0 state: up mac: f8:59:71:49:f6:2e Drives: Local Storage: total: 476.94 GiB used: 272.06 GiB (57.0%) ID-1: /dev/nvme0n1 vendor: Samsung model: SSD 960 PRO 512GB size: 476.94 GiB Partition: ID-1: / size: 33.65 GiB used: 22.44 GiB (66.7%) fs: ext4 dev: /dev/nvme0n1p2 ID-2: swap-1 size: 15.62 GiB used: 0 KiB (0.0%) fs: swap dev: /dev/nvme0n1p4 Sensors: System Temperatures: cpu: 36.5 C mobo: N/A Fan Speeds (RPM): cpu: 0 Info: Processes: 236 Uptime: 1d 19h 44m Memory: 19.43 GiB used: 6.50 GiB (33.5%) Shell: bash inxi: 3.0.38 Workaround: This may have to with a Kernel Regression or be Kernel related? (This is getting quickly above my pay grade.) I used Grub Customizer to boot with kernel 4.18.5-041805-generic and network connectivity/throughput is now functioning as it should. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1871411/+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
