Hi,
(this is the first time I'm reporting a but against the kernel - so
please bear with me, and if I'm doing anything wrong or anything is
missing, please let me know!)
I have a Thinkpad x220t with an Ericsson F5521gw WWAN interface,
running Archlinux.
Since updating my kernel from 3.19.3 to 4.0.2 I see the following
behaviour, which I can also reproduce with 4.1.0 mainline:
The network interface (wwan0) has traffic spikes of some gigabytes per
second in ifconfig or conky - right now, 10 minutes after booting, I
see this:
RX packets 4083 bytes 2277043 (2.1 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 3680 bytes 12025908915562 (10.9 TiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lsusb | grep Ericsson:
Bus 002 Device 003: ID 0bdb:1911 Ericsson Business Mobile Networks BV
dmesg | grep cdc:
[ 9.618674] cdc_wdm 2-1.4:1.5: cdc-wdm0: USB WDM device
[ 9.618723] cdc_wdm 2-1.4:1.8: cdc-wdm1: USB WDM device
[ 9.618741] usbcore: registered new interface driver cdc_wdm
[ 9.619206] cdc_acm 2-1.4:1.1: ttyACM0: USB ACM device
[ 9.621604] cdc_acm 2-1.4:1.3: ttyACM1: USB ACM device
[ 9.622121] cdc_acm 2-1.4:1.9: ttyACM2: USB ACM device
[ 9.622705] usbcore: registered new interface driver cdc_acm
[ 9.622707] cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters
[ 9.648492] cdc_ncm 2-1.4:1.6: MAC-Address: 02:80:37:ec:02:00
[ 9.648754] cdc_ncm 2-1.4:1.6 wwan0: register 'cdc_ncm' at usb-0000:00:1d.0-1.4, Mobile Broadband Network Device, 02:80:37:ec:02:00
[ 9.648777] usbcore: registered new interface driver cdc_ncm
[ 9.656875] usbcore: registered new interface driver cdc_mbim
[ 27.532739] cdc_ncm 2-1.4:1.6 wwan0: kevent 12 may have been dropped
[ 27.533187] cdc_ncm 2-1.4:1.6 wwan0: kevent 12 may have been dropped
[ 27.533639] cdc_ncm 2-1.4:1.6 wwan0: kevent 12 may have been dropped
[ 27.538294] cdc_ncm 2-1.4:1.6 wwan0: network connection: disconnected
[ 27.554230] cdc_ncm 2-1.4:1.6 wwan0: 21 mbit/s downlink 5 mbit/s uplink
[ 27.562250] cdc_ncm 2-1.4:1.6 wwan0: network connection: connected
ver_linux output:
Linux ginny 4.1.0-1-mainline #1 SMP PREEMPT Thu May 21 20:32:21 CEST 2015 x86_64 GNU/Linux
Gnu C 4.9.2
Gnu make 4.1
binutils 2.25.0
util-linux 2.26.1
mount debug
module-init-tools 20
e2fsprogs 1.42.12
jfsutils 1.1.15
reiserfsprogs 3.6.24
xfsprogs 3.2.2
pcmciautils 018
PPP 2.4.7
Linux C Library Dynamic linker (ldd) 2.21
Linux C++ Library 6.0.20
Procps 3.3.10
Net-tools 2.10-alpha
Kbd 2.0.2
Sh-utils 8.23
wireless-tools 30
Modules Loaded ctr ccm snd_hda_codec_hdmi
snd_hda_codec_conexant iTCO_wdt iTCO_vendor_support
snd_hda_codec_generic arc4 iwldvm coretemp intel_rapl mac80211
iosf_mbi x86_pkg_temp_thermal intel_powerclamp kvm_intel joydev
mousedev kvm uvcvideo evdev i915 psmouse videobuf2_vmalloc mac_hid
videobuf2_memops pcspkr iwlwifi cdc_mbim serio_raw videobuf2_core
snd_hda_intel wacom i2c_i801 cdc_ncm v4l2_common
snd_hda_controller usbnet drm_kms_helper cdc_acm videodev cdc_wdm
snd_hda_codec mii drm media snd_hda_core intel_gtt i2c_algo_bit
cfg80211 lpc_ich thinkpad_acpi thermal wmi e1000e snd_hwdep
tpm_tis nvram snd_pcm battery tpm rfkill i2c_core hwmon ac
snd_timer mei_me snd mei video shpchp ptp pps_core soundcore
button processor sch_fq_codel tun nfs lockd grace sunrpc fscache
ext4 crc16 mbcache jbd2 algif_skcipher af_alg dm_crypt dm_mod
sd_mod usbhid hid atkbd libps2 crct10dif_pclmul crc32_pclmul
crc32c_intel ghash_clmulni_intel aesni_intel aes_x86_64 lrw
gf128mul glue_helper ablk_helper cryptd ahci libahci libata
sdhci_pci sdhci ehci_pci led_class scsi_mod ehci_hcd mmc_core
usbcore usb_common i8042 serio
When downgrading to 3.19.3 the issue is gone again.
Thanks for your time, and please let me know if there's anything I can
do to help.
Florian
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