sudo /usr/bin/lttng-sessiond -vvv shows us the cause: DEBUG1 - 08:54:51.384370 [14445/14475]: Processing client command 14 (in process_client_msg() at main.c:2989) modprobe: FATAL: Module lttng-tracer not found in directory /lib/modules/4.10.0-14-generic Error: Unable to load required module lttng-tracer DEBUG1 - 08:54:51.387309 [14445/14475]: Failed to open /proc/lttng (in init_kernel_tracer() at main.c:2721) DEBUG1 - 08:54:51.390165 [14445/14475]: Modprobe removal successful lttng-kretprobes (in modprobe_remove_lttng() at modprobe.c:126) DEBUG1 - 08:54:51.392860 [14445/14475]: Modprobe removal successful lttng-kprobes (in modprobe_remove_lttng() at modprobe.c:126) DEBUG1 - 08:54:51.396010 [14445/14475]: Modprobe removal successful lttng-ftrace (in modprobe_remove_lttng() at modprobe.c:126) DEBUG1 - 08:54:51.398841 [14445/14475]: Modprobe removal successful lttng-types (in modprobe_remove_lttng() at modprobe.c:126) Error: Unable to remove module lttng-ring-buffer-metadata-mmap-client Error: Unable to remove module lttng-ring-buffer-client-mmap-overwrite Error: Unable to remove module lttng-ring-buffer-client-mmap-discard Error: Unable to remove module lttng-ring-buffer-metadata-client Error: Unable to remove module lttng-ring-buffer-client-overwrite Error: Unable to remove module lttng-ring-buffer-client-discard Error: Unable to remove module lttng-lib-ring-buffer Error: Unable to remove module lttng-tracer Warning: No kernel tracer available DEBUG1 - 08:54:51.422146 [14445/14475]: Missing llm structure. Allocating one. (in process_client_msg() at main.c:4037) DEBUG1 - 08:54:51.422168 [14445/14475]: Sending response (size: 16, retcode: Kernel tracer not available) (in thread_manage_clients() at main.c:4456) DEBUG1 - 08:54:51.422197 [14445/14475]: Clean command context structure (in clean_command_ctx() at main.c:829) DEBUG1 - 08:54:51.422206 [14445/14475]: Accepting client command ... (in thread_manage_clients() at main.c:4310)
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1677126 Title: ubuntu_lttng_smoke_test failed on z-hwe: Kernel tracer not available To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-hwe-edge/+bug/1677126/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
