Hello, I recently had some problems with my Lenovo T450s. The ModemManager and mbim-proxy processes were generating a lot of CPU activity.
ModemManager: 1.8.0 libmbim: 1.16.0 libqmi: 1.20.0 Kernel: v4.14.65 The modem is a: usb 2-4: New USB device found, idVendor=1199, idProduct=a001 usb 2-4: New USB device strings: Mfr=1, Product=2, SerialNumber=3 usb 2-4: Product: Sierra Wireless EM7345 4G LTE usb 2-4: Manufacturer: Sierra Wireless Inc. usb 2-4: SerialNumber: 013937003907084 I ran strace on both the ModemManager and the mbim-proxy, there were sending the same command over and over again to the kernel driver and were receiving an -EAGAIN: modem-manager: 13:00:26.252810 write(9, "\3\0\0\0000\0\0\0=\1\0\0\1\0\0\0\0\0\0\0\242\211\3143\274\273\213O\266\260\23>"..., 48) = -1 EAGAIN (Resource temporarily unavailable) 13:00:26.252877 write(9, "\3\0\0\0000\0\0\0=\1\0\0\1\0\0\0\0\0\0\0\242\211\3143\274\273\213O\266\260\23>"..., 48) = -1 EAGAIN (Resource temporarily unavailable) ... mbim-proxy: 13:00:48.228085 write(7, "\3\0\0\0000\0\0\0\23\0\0\0\1\0\0\0\0\0\0\0\242\211\3143\274\273\213O\266\260\23>"..., 48) = -1 EAGAIN (Resource temporarily unavailable) 13:00:48.228172 write(7, "\3\0\0\0000\0\0\0\23\0\0\0\1\0\0\0\0\0\0\0\242\211\3143\274\273\213O\266\260\23>"..., 48) = -1 EAGAIN (Resource temporarily unavailable) ... I also ran gdb on the ModemManager to get some context: #0 0x000074db7c29815d in write () from /lib/libpthread.so.0 #1 0x000074db7c53333c in g_io_unix_write () from /usr/lib/libglib-2.0.so.0 #2 0x000074db7c4e3c01 in g_io_channel_write_chars () from /usr/lib/libglib-2.0.so.0 #3 0x000074db7cdacf2e in device_write () from /usr/lib/libmbim-glib.so.4 #4 0x000074db7cdad206 in device_send () from /usr/lib/libmbim-glib.so.4 #5 0x000074db7cdaea48 in mbim_device_command () from /usr/lib/libmbim-glib.so.4 #6 0x000008d1680e77fb in modem_3gpp_run_registration_checks () #7 0x000008d16809bdaa in mm_iface_modem_3gpp_run_registration_checks () #8 0x000008d16809be42 in periodic_registration_check () #9 0x000074db7c4ef233 in g_timeout_dispatch () from /usr/lib/libglib-2.0.so.0 #10 0x000074db7c4ee7fa in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0 #11 0x000074db7c4eeb78 in g_main_context_iterate.isra () from /usr/lib/libglib-2.0.so.0 #12 0x000074db7c4eee92 in g_main_loop_run () from /usr/lib/libglib-2.0.so.0 #13 0x000008d16807580e in main () Detaching from program: /usr/bin/ModemManager, process 4020 The logs from the kernel and the ModemManager were too large to attach here, I uploaded them to pastebin: - ModemManager: https://pastebin.com/7NbUmmde - kernel: https://pastebin.com/tRdb5fDe In the kernel I only found some throttling messages which should be related to the high CPU activity. Otherwise, I found no relevant messages from the kernel. In the ModemManager log file the problem seems to start with the following messages, about 3 minutes after starting the ModemManager: <warn> [1542959070.991422] Initial 3GPP registration check failed: Transaction timed out <debug> [1542959080.961091] Couldn't refresh 3GPP registration status: 'Transaction timed out' <debug> [1542959100.961091] Running registration checks (CS: 'yes', PS: 'yes', EPS: 'yes') [/dev/cdc-wdm0] Sent message... [/dev/cdc-wdm0] Sent message... <<<<<< RAW: <<<<<< length = 48 <<<<<< data = 03:00:00:00:30:00:00:00:23:00:00:00:01:00:00:00:00:00:00:00:A2:89:CC:33:BC:BB:8B:4F:B6:B0:13:3E:C2:AA:E6:DF:09:00:00:00:00:00:00:00:00:00:00:00 [/dev/cdc-wdm0] Sent message (translated)... <<<<<< Header: <<<<<< length = 48 <<<<<< type = command (0x00000003) <<<<<< transaction = 35 <<<<<< Fragment header: <<<<<< total = 1 <<<<<< current = 0 <<<<<< Contents: <<<<<< service = 'basic-connect' (a289cc33-bcbb-8b4f-b6b0-133ec2aae6df) <<<<<< cid = 'register-state' (0x00000009) <<<<<< type = 'query' (0x00000000) The problem only occured one time so far. After rebooting the system the LTE modem resumed normal operation. Has anyone any idea, what was happening here? _______________________________________________ ModemManager-devel mailing list ModemManager-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/modemmanager-devel
