Hello Timo. I completed my testing using the generic_5.8.0 (2020-08-25 05:38) and generic_5.9.0 (current/2020-09-15 02:44) kernel files that you linked me.
The steps I used were as follows: 1. Download the kernel files (linux-image, linux-module) to a removable USB 2. Boot to target Ubuntu 20.04 environment using the EFI Ubuntu GRUB location 3. Copy the kernel files to the Ubuntu Desktop 4. Run "sudo dpkg -i" targeting the kernel files 5. Perform a warm reboot back into Ubuntu, followed by a device power off (Shutdown) 6. Repeat the test sequence used to show the failure, to determine if the new kernel files solves this issue a. Power on the device b. Boot to target Ubuntu 20.04 environment using the EFI Ubuntu GRUB location c. Perform a 'Restart' action in Ubuntu d. Allow the device to boot into Windows 10 (no Boot Menu selection was required, Win10 loads natively using Windows Boot Manager) e. Use the Start Menu to put the device to S3 Sleep Expected: The environment is able to enter the S3 Sleep state without issue using the new kernel files Actual: The environment experiences a WHEA_UNCORRECTABLE_ERROR BSOD event Did I perform this re-test correctly? If so, what are the next steps for this issue? Thank you. ** Attachment added: "Installing Linux Kernel Files" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1893820/+attachment/5411381/+files/wm_ubuntu_kernel_install.jpg -- 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/1893820 Title: DPLL2 override remains enabled after warm boot of Linux Status in linux package in Ubuntu: Incomplete Bug description: Ubuntu Version Target: 18.04.1 LTS (bootable Ubuntu USB stick) Package Version Target: Unknown Expected: Windows S3 Sleep actions with two DisplayPort monitors using Intel integrated graphics should be able to work without issue after entering a Windows OS from a previously loaded Ubuntu session Actual: Windows S3 Sleep actions with two DisplayPort monitors using Intel integrated graphics will result in a BSOD event if a Windows OS is loaded after an Ubuntu OS session that was ended by a warm reboot action Description: Using a dual-boot Ubuntu/Windows 10 desktop computer environment with two native DisplayPort MB connections to the Intel integrated graphics solution and two DisplayPort monitors it was observed that performing a Windows S3 Sleep action will cause a "WHEA uncorrectable error" BSOD event if the first OS loaded is Linux and the second OS Windows is loaded using a warm boot action. Investigating this BSOD event further it was determined that this issue is specific to the "Linux->warm boot->Windows->S3 Sleep" sequence as long as two DisplayPort monitors are connected to the desktop computer's DisplayPort MB connections. A deeper investigation of the cause of the BSOD identified that upon unloading Linux the DPLL2 override bit remains enabled and will cause a subsequent Windows desktop environment to be vulnerable to failure if it makes use of two DisplayPort-connected monitors. This issue can be reproduced using OEM hardware from either of Lenovo, HP, or Dell. This issue was first observed on the Q270/Q370 Intel chipset and the Intel 530/630 Graphics hardware. Calvin Hartwell of Canonical has been made aware of this issue and been provided issue details and video evidence. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1893820/+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
