It appears fixes from this fork are also required: https://github.com/nix-community/acpi_call
See this blog post: https://blog.monosoul.dev/2021/10/16/ubuntu-21-10-and-acpi-call-dkms-bug/ sudo dmesg | grep "BUG: kernel NULL pointer dereference" -A 10 [45420.141212] BUG: kernel NULL pointer dereference, address: 0000000000000000 [45420.141217] #PF: supervisor instruction fetch in kernel mode [45420.141220] #PF: error_code(0x0010) - not-present page [45420.141221] PGD 0 P4D 0 [45420.141224] Oops: 0010 [#4] SMP NOPTI [45420.141226] CPU: 3 PID: 85578 Comm: tpacpi-bat Tainted: G D O 5.13.0-19-generic #1 [45420.141229] Hardware name: LENOVO 20NLCTO1WW/20NLCTO1WW, BIOS R13ET49P(1.23 ) 11/24/2020 [45420.141231] RIP: 0010:0x0 [45420.141236] Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6. [45420.141238] RSP: 0018:ffffa60ec2fc3ef0 EFLAGS: 00010246 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1901452 Title: Upgrade to 20.10 error. acpi-call-dkms : ERROR: Kernel configuration is invalid. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/acpi-call/+bug/1901452/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
