This was also reported on https://gitlab.com/vicamo/backport-iwlwifi- dkms/issues/7, and it has basically the same root cause with bug 1854156.
** Bug watch added: gitlab.com/vicamo/backport-iwlwifi-dkms/issues #7 https://gitlab.com/vicamo/backport-iwlwifi-dkms/issues/7 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-meta-oem in Ubuntu. https://bugs.launchpad.net/bugs/1855825 Title: When connecting to wifi with the proposed linux-oem kernel , the system hangs Status in linux-meta-oem package in Ubuntu: In Progress Bug description: Dell XPS 13 7390 (CID 201906-27119)(connected with a SAL TBT docking device) Pre-load Ubuntu kernel: linux-oem 4.15.0-1066.76-oem [Description] The system hangs when connecting to wifi [Steps to Reproduce] Connect to bg-wifi over the wifi applet of your desktop. Select the SSID and then being prompted for a password. The system hangs immediately after entering the password. Reproducing Rate: 100% [Expected Result] Wifi works and the system keeps running. [Actual Result] System hangs. [Additional Information] 4.15.0-1066 oem kernel looks good for this test case. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: linux-oem 4.15.0.1066.70 ProcVersionSignature: Ubuntu 4.15.0-1065.75-oem 4.15.18 Uname: Linux 4.15.0-1065-oem x86_64 ApportVersion: 2.20.9-0ubuntu7.10 Architecture: amd64 Date: Tue Dec 10 13:47:54 2019 DistributionChannelDescriptor: # This is the distribution channel descriptor for the OEM CDs # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor canonical-oem-somerville-bionic-amd64-20180608-47+beaver-three-eyed-raven+X92 InstallationDate: Installed on 2019-10-08 (63 days ago) InstallationMedia: Ubuntu 18.04 "Bionic" - Build amd64 LIVE Binary 20180608-09:38 SourcePackage: linux-meta-oem UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-meta-oem/+bug/1855825/+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