With newer libjcat installed from given ppa in comment #4, and restarted the daemon now I can update firmware successfully. Thanks.
$ fwupdmgr --version runtime org.freedesktop.fwupd 1.7.5 runtime com.dell.libsmbios 2.4 compile org.freedesktop.gusb 0.3.4 runtime org.kernel 5.11.0-49-generic compile org.freedesktop.fwupd 1.7.5 runtime org.freedesktop.gusb 0.3.5 $ dpkg -l | grep libjcat ii gir1.2-jcat-1.0:amd64 0.1.9-1~20.04.1 ii libjcat-dev:amd64 0.1.9-1~20.04.1 ii libjcat1:amd64 0.1.9-1~20.04.1 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1961864 Title: fwupd daemon failed verifying firmware signature To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1961864/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
