Sadly, if you can't access BIOS, I have no other idea. My "plan" was to try to enter the BIOS somehow, then disable UEFI boot (to boot plain old BIOS compatibility mode) and boot Linux or a live Linux USB key, and see if you can clear the dump files from there (which may or may not be possible if you boot in BIOS compatibility mode - maybe /sys/firmware/efi is accessible only when booted in UEFI mode, I don't know, I didn't test that).
Being the maintainer of the Debian acpi-call package and having delayed the new version for so log, I feel kind of responsible for your problem. Little did I know that a manufacturer, let alone a well-established one like Lenovo, wouldn't foresee this problem and let their product be bricked by a full NVRAM. I know that the X131e is a low-end model, but still, it hardly makes sense. Another thing that I don't understand is that there is a failsafe in the Linux kernel that prevents writing to the NVRAM when it's more that 50% full; I don't know why Ubuntu kept filling your NVRAM with these dumps until it was completely full. Did you add "efi_no_storage_paranoia" to the kernel command line in GRUB configuration ? Or maybe you were using an older kernel dating from before this failsafe was implemented ? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1953261 Title: kernel >= 5.13 BUG: kernel NULL pointer dereference To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/acpi-call/+bug/1953261/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
