Comment # 4 on bug 1201066 from Darragh O'Reilly

Created attachment 860011 [details]
strace output

openat(AT_FDCWD,
"/sys/firmware/efi/efivars/MokNew-605dab50-e046-4300-abb6-3dd810dd8b23",
O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD,
"/sys/firmware/efi/efivars/MokNew-605dab50-e046-4300-abb6-3dd810dd8b23",
O_WRONLY|O_CREAT|O_EXCL, 0600) = -1 EROFS (Read-only file system)
ioctl(-1, FS_IOC_SETFLAGS, [0])         = -1 EBADF (Bad file descriptor)
write(2, "Failed to enroll new keys\n", 26) = 26
exit_group(-1)                          = ?
+++ exited with 255 +++