USB Modem failed to be recognized after recent system update

rasr11 · 2015-06-24 08:14:01

After updating the system yesterday, my USB Modem (which I use as a storage device) is no longer recognized and doesn't show up in the file manager and also in "lsblk -f" output. I checked the pacman log file, and after some trial and error, made the following changes which fixed the problem for now :

1. removed libgudev forcefully by 'pacman -Rdd libgudev'
2. downgraded the systemd and libsystemd to 219-6 version

Will remvoal of libgudev cause any problem?
Can anyone suggest me any better or alternative solution for this?

jasonwryan · 2015-06-24 08:40:24

Not a Sysadmin issue, moving to NC...

mauritiusdadd · 2015-06-28 09:50:31

Similar thread: https://bbs.archlinux.org/viewtopic.php?id=199075

rasr11 wrote:

After updating the system yesterday, my USB Modem (which I use as a storage device) is no longer recognized and doesn't show up in the file manager and also in "lsblk -f" output

What USB Modem are you using? Is it shown up by lsusb?

rasr11 wrote:

Can anyone suggest me any better or alternative solution for this?

Yes, you can help us to understand if the problem is in systemd or usb_modeswitch or somewere else so we can file a bug report upstream: since you are now using systemd 219, can you change the log level for udev using the following command

udevadm control --log-priority=debug

and then insert your USB modem and post what is written in your journal?

Last edited by mauritiusdadd (2015-06-28 09:51:12)

rasr11 · 2015-06-28 14:51:10

I am using micromax modem 352g.

I recently updated my systemd to 221-2. Modem doesn't get detected as mass storage.

lsusb detects the modem :

Bus 001 Device 005: ID 1c9e:f000 OMEGA TECHNOLOGY

journal log after inserting the modem:

Jun 28 19:45:15 brainiac kernel: usb 1-1.2: new high-speed USB device number 5 using ehci-pci
Jun 28 19:45:15 brainiac systemd-udevd[278]: seq 1928 queued, 'add' 'usb'
Jun 28 19:45:15 brainiac systemd-udevd[278]: Validate module index
Jun 28 19:45:15 brainiac systemd-udevd[278]: Check if link configuration needs reloading.
Jun 28 19:45:15 brainiac systemd-udevd[278]: seq 1928 forked new worker [2114]
Jun 28 19:45:15 brainiac kernel: usb-storage 1-1.2:1.0: USB Mass Storage device detected
Jun 28 19:45:15 brainiac kernel: scsi host5: usb-storage 1-1.2:1.0
Jun 28 19:45:15 brainiac systemd-udevd[2114]: seq 1928 running
Jun 28 19:45:15 brainiac systemd-udevd[2114]: IMPORT builtin 'usb_id' /usr/lib/udev/rules.d/40-gphoto.rules:9
Jun 28 19:45:15 brainiac systemd-udevd[278]: seq 1929 queued, 'add' 'usb'
Jun 28 19:45:15 brainiac systemd-udevd[278]: seq 1930 queued, 'add' 'scsi'
Jun 28 19:45:15 brainiac systemd-udevd[278]: seq 1931 queued, 'add' 'scsi_host'
Jun 28 19:45:15 brainiac systemd-udevd[2114]: RUN 'usb_modeswitch '%b/%k'' /usr/lib/udev/rules.d/40-usb_modeswitch.rules:780
Jun 28 19:45:15 brainiac systemd-udevd[2114]: IMPORT builtin skip 'usb_id' /usr/lib/udev/rules.d/50-udev-default.rules:13
Jun 28 19:45:15 brainiac systemd-udevd[2114]: IMPORT builtin 'hwdb' /usr/lib/udev/rules.d/50-udev-default.rules:13
Jun 28 19:45:15 brainiac systemd-udevd[2114]: MODE 0664 /usr/lib/udev/rules.d/50-udev-default.rules:41
Jun 28 19:45:15 brainiac systemd-udevd[2114]: PROGRAM '/usr/lib/udev/mtp-probe /sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2 1 5' /usr/lib/udev/r
Jun 28 19:45:15 brainiac systemd-udevd[2118]: starting '/usr/lib/udev/mtp-probe /sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2 1 5'
Jun 28 19:45:15 brainiac mtp-probe[2118]: checking bus 1, device 5: "/sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2"
Jun 28 19:45:15 brainiac mtp-probe[2118]: bus: 1, device: 5 was not an MTP device
Jun 28 19:45:15 brainiac systemd-udevd[2114]: '/usr/lib/udev/mtp-probe /sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2 1 5'(out) '0'
Jun 28 19:45:15 brainiac systemd-udevd[2114]: Process '/usr/lib/udev/mtp-probe /sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2 1 5' succeeded.
Jun 28 19:45:15 brainiac systemd-udevd[2114]: handling device node '/dev/bus/usb/001/005', devnum=c189:4, mode=0664, uid=0, gid=0
Jun 28 19:45:15 brainiac systemd-udevd[2114]: set permissions /dev/bus/usb/001/005, 020664, uid=0, gid=0
Jun 28 19:45:15 brainiac systemd-udevd[2114]: creating symlink '/dev/char/189:4' to '../bus/usb/001/005'
Jun 28 19:45:15 brainiac systemd-udevd[2114]: created db file '/run/udev/data/c189:4' for '/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2'
Jun 28 19:45:15 brainiac systemd-udevd[2119]: starting 'usb_modeswitch '/1-1.2''
Jun 28 19:45:15 brainiac systemd-udevd[2114]: Process 'usb_modeswitch '/1-1.2'' succeeded.
Jun 28 19:45:15 brainiac systemd-udevd[2114]: passed device to netlink monitor 0x7fe8a5617420
Jun 28 19:45:15 brainiac systemd-udevd[2114]: seq 1928 processed
Jun 28 19:45:15 brainiac systemd-udevd[278]: passed 300 byte device to netlink monitor 0x7fe8a5609cf0
Jun 28 19:45:15 brainiac systemd-udevd[2114]: seq 1929 running
Jun 28 19:45:15 brainiac systemd-udevd[2114]: IMPORT builtin 'usb_id' /usr/lib/udev/rules.d/40-gphoto.rules:9
Jun 28 19:45:15 brainiac systemd-udevd[2114]: unable to access usb_interface device of '/sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0'
Jun 28 19:45:15 brainiac systemd-udevd[2114]: IMPORT builtin 'usb_id' returned non-zero
Jun 28 19:45:15 brainiac systemd-udevd[2114]: IMPORT builtin 'hwdb' /usr/lib/udev/rules.d/50-udev-default.rules:15
Jun 28 19:45:15 brainiac systemd-udevd[2114]: IMPORT builtin skip 'usb_id' /usr/lib/udev/rules.d/56-hpmud.rules:10
Jun 28 19:45:16 brainiac systemd-udevd[2114]: RUN 'kmod load $env{MODALIAS}' /usr/lib/udev/rules.d/80-drivers.rules:5
Jun 28 19:45:16 brainiac systemd-udevd[2114]: created db file '/run/udev/data/+usb:1-1.2:1.0' for '/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.
Jun 28 19:45:16 brainiac systemd-udevd[2114]: Execute 'load' 'usb:v1C9EpF000d0000dc00dsc00dp00ic08isc06ip50in00'
Jun 28 19:45:16 brainiac systemd-udevd[2114]: Inserted 'uas'
Jun 28 19:45:16 brainiac systemd-udevd[2114]: Inserted 'usb_storage'
Jun 28 19:45:16 brainiac systemd-udevd[2114]: passed device to netlink monitor 0x7fe8a5617420
Jun 28 19:45:16 brainiac systemd-udevd[2114]: seq 1929 processed
Jun 28 19:45:16 brainiac systemd-udevd[278]: passed 196 byte device to netlink monitor 0x7fe8a5609cf0
Jun 28 19:45:16 brainiac systemd-udevd[2114]: seq 1930 running
Jun 28 19:45:16 brainiac systemd-udevd[2114]: IMPORT builtin 'usb_id' /usr/lib/udev/rules.d/56-hpmud.rules:10
Jun 28 19:45:16 brainiac systemd-udevd[2114]: /sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0: if_class 8 protocol 6
Jun 28 19:45:16 brainiac systemd-udevd[2114]: unable to find parent 'scsi' device of '/sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0/hos
Jun 28 19:45:16 brainiac systemd-udevd[2114]: created db file '/run/udev/data/+scsi:host5' for '/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1
Jun 28 19:45:16 brainiac systemd-udevd[2114]: passed device to netlink monitor 0x7fe8a5617420
Jun 28 19:45:16 brainiac systemd-udevd[2114]: seq 1930 processed
Jun 28 19:45:16 brainiac systemd-udevd[278]: passed 199 byte device to netlink monitor 0x7fe8a5609cf0
Jun 28 19:45:16 brainiac systemd-udevd[2114]: seq 1931 running
Jun 28 19:45:16 brainiac systemd-udevd[2114]: IMPORT builtin 'usb_id' /usr/lib/udev/rules.d/56-hpmud.rules:10
Jun 28 19:45:16 brainiac systemd-udevd[2114]: /sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0: if_class 8 protocol 6
Jun 28 19:45:16 brainiac systemd-udevd[2114]: unable to find parent 'scsi' device of '/sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0/hos
Jun 28 19:45:16 brainiac systemd-udevd[2114]: created db file '/run/udev/data/+scsi_host:host5' for '/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-
Jun 28 19:45:16 brainiac systemd-udevd[2114]: passed device to netlink monitor 0x7fe8a5617420
Jun 28 19:45:16 brainiac systemd-udevd[2114]: seq 1931 processed
Jun 28 19:45:16 brainiac systemd-udevd[278]: cleanup idle workers
Jun 28 19:45:16 brainiac systemd-udevd[2114]: Unload module index
Jun 28 19:45:16 brainiac systemd-udevd[2114]: Unloaded link configuration context.
Jun 28 19:45:16 brainiac systemd-udevd[278]: worker [2114] exited
Jun 28 19:45:16 brainiac systemd-udevd[278]: seq 1932 queued, 'add' 'scsi'
Jun 28 19:45:16 brainiac systemd-udevd[278]: seq 1932 forked new worker [2132]
Jun 28 19:45:16 brainiac kernel: scsi 5:0:0:0: CD-ROM            USBModem Disk             2.31 PQ: 0 ANSI: 2
Jun 28 19:45:16 brainiac systemd-udevd[278]: seq 1933 queued, 'add' 'scsi'
Jun 28 19:45:16 brainiac systemd-udevd[2132]: seq 1932 running
Jun 28 19:45:16 brainiac systemd-udevd[2132]: IMPORT builtin 'usb_id' /usr/lib/udev/rules.d/56-hpmud.rules:10
Jun 28 19:45:16 brainiac systemd-udevd[2132]: /sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0: if_class 8 protocol 6
Jun 28 19:45:16 brainiac systemd-udevd[278]: seq 1934 queued, 'add' 'bdi'
Jun 28 19:45:16 brainiac systemd-udevd[2132]: unable to find parent 'scsi' device of '/sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0/hos
Jun 28 19:45:16 brainiac systemd-udevd[278]: seq 1934 forked new worker [2133]
Jun 28 19:45:16 brainiac systemd-udevd[278]: seq 1935 queued, 'add' 'block'
Jun 28 19:45:16 brainiac systemd-udevd[2133]: seq 1934 running
Jun 28 19:45:16 brainiac kernel: sr 5:0:0:0: [sr1] scsi-1 drive
Jun 28 19:45:16 brainiac kernel: sr 5:0:0:0: Attached scsi CD-ROM sr1
Jun 28 19:45:16 brainiac systemd-udevd[278]: seq 1936 queued, 'add' 'scsi_device'
Jun 28 19:45:16 brainiac systemd-udevd[2133]: IMPORT builtin 'usb_id' /usr/lib/udev/rules.d/56-hpmud.rules:10
Jun 28 19:45:16 brainiac systemd-udevd[2133]: unable to access usb_interface device of '/sys/devices/virtual/bdi/11:1'
Jun 28 19:45:16 brainiac systemd-udevd[278]: seq 1937 queued, 'add' 'bsg'
Jun 28 19:45:16 brainiac systemd-udevd[2133]: IMPORT builtin 'usb_id' returned non-zero
Jun 28 19:45:16 brainiac systemd-udevd[2133]: passed device to netlink monitor 0x7fe8a5641130
Jun 28 19:45:16 brainiac systemd-udevd[2133]: seq 1934 processed
Jun 28 19:45:16 brainiac systemd-udevd[2132]: created db file '/run/udev/data/+scsi:target5:0:0' for '/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1
Jun 28 19:45:16 brainiac systemd-udevd[2132]: passed device to netlink monitor 0x7fe8a5642880
Jun 28 19:45:16 brainiac systemd-udevd[2132]: seq 1932 processed
Jun 28 19:45:16 brainiac systemd-udevd[278]: passed 239 byte device to netlink monitor 0x7fe8a5609cf0
Jun 28 19:45:16 brainiac systemd-udevd[2133]: seq 1933 running
Jun 28 19:45:16 brainiac systemd-udevd[278]: seq 1938 queued, 'change' 'block'
Jun 28 19:45:16 brainiac systemd-udevd[2133]: IMPORT builtin 'hwdb' /usr/lib/udev/rules.d/50-udev-default.rules:15
Jun 28 19:45:16 brainiac systemd-udevd[2133]: IMPORT builtin 'hwdb' returned non-zero
Jun 28 19:45:16 brainiac systemd-udevd[2133]: IMPORT builtin 'usb_id' /usr/lib/udev/rules.d/56-hpmud.rules:10
Jun 28 19:45:16 brainiac systemd-udevd[2133]: /sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0: if_class 8 protocol 6
Jun 28 19:45:16 brainiac systemd-udevd[2133]: unable to find parent 'scsi' device of '/sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0/hos
Jun 28 19:45:16 brainiac systemd-udevd[2133]: RUN 'kmod load $env{MODALIAS}' /usr/lib/udev/rules.d/80-drivers.rules:5
Jun 28 19:45:16 brainiac systemd-udevd[2133]: created db file '/run/udev/data/+scsi:5:0:0:0' for '/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2
Jun 28 19:45:16 brainiac systemd-udevd[2133]: Execute 'load' 'scsi:t-0x05'
Jun 28 19:45:16 brainiac systemd-udevd[2133]: Inserted 'sr_mod'
Jun 28 19:45:16 brainiac systemd-udevd[2133]: passed device to netlink monitor 0x7fe8a5641130
Jun 28 19:45:16 brainiac systemd-udevd[2133]: seq 1933 processed
Jun 28 19:45:16 brainiac systemd-udevd[278]: passed 256 byte device to netlink monitor 0x7fe8a5609cf0
Jun 28 19:45:16 brainiac systemd-udevd[2133]: seq 1935 running
Jun 28 19:45:16 brainiac systemd-udevd[278]: passed 225 byte device to netlink monitor 0x7fe8a5609cf0
Jun 28 19:45:16 brainiac systemd-udevd[2132]: seq 1936 running

Jun 28 19:45:16 brainiac systemd-udevd[278]: seq 1937 forked new worker [2134]
Jun 28 19:45:16 brainiac systemd-udevd[2134]: seq 1937 running
Jun 28 19:45:16 brainiac systemd-udevd[2132]: IMPORT builtin 'usb_id' /usr/lib/udev/rules.d/56-hpmud.rules:10
Jun 28 19:45:16 brainiac systemd-udevd[2134]: IMPORT builtin 'usb_id' /usr/lib/udev/rules.d/56-hpmud.rules:10
Jun 28 19:45:16 brainiac systemd-udevd[2132]: /sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0: if_class 8 protocol 6
Jun 28 19:45:16 brainiac systemd-udevd[2134]: /sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0: if_class 8 protocol 6
Jun 28 19:45:16 brainiac systemd-udevd[2132]: created db file '/run/udev/data/+scsi_device:5:0:0:0' for '/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0/host5/target5:0:0/5:0:0:0/scsi_device/5:0:0:0'
Jun 28 19:45:16 brainiac systemd-udevd[2134]: handling device node '/dev/bsg/5:0:0:0', devnum=c252:2, mode=0600, uid=0, gid=0
Jun 28 19:45:16 brainiac systemd-udevd[2134]: preserve permissions /dev/bsg/5:0:0:0, 020600, uid=0, gid=0
Jun 28 19:45:16 brainiac systemd-udevd[2134]: creating symlink '/dev/char/252:2' to '../bsg/5:0:0:0'
Jun 28 19:45:16 brainiac systemd-udevd[2132]: passed device to netlink monitor 0x7fe8a5642880
Jun 28 19:45:16 brainiac systemd-udevd[2134]: created db file '/run/udev/data/c252:2' for '/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0/host5/target5:0:0/5:0:0:0/bsg/5:0:0:0'
Jun 28 19:45:16 brainiac systemd-udevd[2132]: seq 1936 processed
Jun 28 19:45:16 brainiac systemd-udevd[2134]: passed device to netlink monitor 0x7fe8a56420d0
Jun 28 19:45:16 brainiac systemd-udevd[2134]: seq 1937 processed
Jun 28 19:45:16 brainiac systemd-udevd[2133]: GROUP 6 /usr/lib/udev/rules.d/50-udev-default.rules:55
Jun 28 19:45:16 brainiac systemd-udevd[2133]: GROUP 93 /usr/lib/udev/rules.d/50-udev-default.rules:56
Jun 28 19:45:16 brainiac systemd-udevd[2133]: IMPORT builtin 'usb_id' /usr/lib/udev/rules.d/56-hpmud.rules:10
Jun 28 19:45:16 brainiac systemd-udevd[2133]: /sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0: if_class 8 protocol 6
Jun 28 19:45:16 brainiac systemd-udevd[2133]: IMPORT 'cdrom_id --lock-media /dev/sr1' /usr/lib/udev/rules.d/60-cdrom_id.rules:16
Jun 28 19:45:16 brainiac systemd-udevd[2135]: starting 'cdrom_id --lock-media /dev/sr1'
Jun 28 19:45:16 brainiac systemd-udevd[2133]: 'cdrom_id --lock-media /dev/sr1'(out) 'ID_CDROM=1'
Jun 28 19:45:16 brainiac systemd-udevd[2133]: 'cdrom_id --lock-media /dev/sr1'(out) 'ID_CDROM_MEDIA=1'
Jun 28 19:45:16 brainiac systemd-udevd[2133]: Process 'cdrom_id --lock-media /dev/sr1' succeeded.
Jun 28 19:45:16 brainiac systemd-udevd[2133]: LINK 'disk/by-id/usb-USBModem_Disk_1234567890ABCDEF-0:0' /usr/lib/udev/rules.d/60-persistent-storage.rules:36
Jun 28 19:45:16 brainiac systemd-udevd[2133]: IMPORT builtin 'path_id' /usr/lib/udev/rules.d/60-persistent-storage.rules:54
Jun 28 19:45:16 brainiac systemd-udevd[2133]: LINK 'disk/by-path/pci-0000:00:1a.0-usb-0:1.2:1.0-scsi-0:0:0:0' /usr/lib/udev/rules.d/60-persistent-storage.rules:55
Jun 28 19:45:16 brainiac systemd-udevd[2133]: RUN 'uaccess' /usr/lib/udev/rules.d/73-seat-late.rules:15
Jun 28 19:45:16 brainiac systemd-udevd[2133]: handling device node '/dev/sr1', devnum=b11:1, mode=0660, uid=0, gid=93
Jun 28 19:45:16 brainiac systemd-udevd[2133]: set permissions /dev/sr1, 060660, uid=0, gid=93
Jun 28 19:45:16 brainiac systemd-udevd[2133]: creating symlink '/dev/block/11:1' to '../sr1'
Jun 28 19:45:16 brainiac systemd-udevd[2133]: creating link '/dev/disk/by-id/usb-USBModem_Disk_1234567890ABCDEF-0:0' to '/dev/sr1'
Jun 28 19:45:16 brainiac systemd-udevd[2133]: creating symlink '/dev/disk/by-id/usb-USBModem_Disk_1234567890ABCDEF-0:0' to '../../sr1'
Jun 28 19:45:16 brainiac systemd-udevd[2133]: creating link '/dev/disk/by-path/pci-0000:00:1a.0-usb-0:1.2:1.0-scsi-0:0:0:0' to '/dev/sr1'
Jun 28 19:45:16 brainiac systemd-udevd[2133]: creating symlink '/dev/disk/by-path/pci-0000:00:1a.0-usb-0:1.2:1.0-scsi-0:0:0:0' to '../../sr1'
Jun 28 19:45:16 brainiac systemd-udevd[2133]: created db file '/run/udev/data/b11:1' for '/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0/host5/target5:0:0/5:0:0:0/block/sr1'
Jun 28 19:45:16 brainiac systemd-udevd[2133]: passed device to netlink monitor 0x7fe8a5641130
Jun 28 19:45:16 brainiac systemd-udevd[2133]: seq 1935 processed
Jun 28 19:45:16 brainiac systemd-udevd[278]: passed 279 byte device to netlink monitor 0x7fe8a5609cf0
Jun 28 19:45:16 brainiac systemd-udevd[2134]: seq 1938 running
Jun 28 19:45:16 brainiac systemd-udevd[2134]: IMPORT 'cdrom_id --lock-media /dev/sr1' /usr/lib/udev/rules.d/60-cdrom_id.rules:16
Jun 28 19:45:16 brainiac systemd-udevd[2138]: starting 'cdrom_id --lock-media /dev/sr1'
Jun 28 19:45:16 brainiac systemd-udevd[2134]: 'cdrom_id --lock-media /dev/sr1'(out) 'ID_CDROM=1'
Jun 28 19:45:16 brainiac systemd-udevd[2134]: 'cdrom_id --lock-media /dev/sr1'(out) 'ID_CDROM_MEDIA=1'
Jun 28 19:45:16 brainiac systemd-udevd[2134]: Process 'cdrom_id --lock-media /dev/sr1' succeeded.
Jun 28 19:45:16 brainiac systemd-udevd[2134]: IMPORT builtin 'usb_id' /usr/lib/udev/rules.d/60-persistent-storage.rules:31
Jun 28 19:45:16 brainiac systemd-udevd[2134]: /sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0: if_class 8 protocol 6
Jun 28 19:45:16 brainiac systemd-udevd[2134]: LINK 'disk/by-id/usb-USBModem_Disk_1234567890ABCDEF-0:0' /usr/lib/udev/rules.d/60-persistent-storage.rules:36
Jun 28 19:45:16 brainiac systemd-udevd[2134]: IMPORT builtin 'path_id' /usr/lib/udev/rules.d/60-persistent-storage.rules:54
Jun 28 19:45:16 brainiac systemd-udevd[2134]: LINK 'disk/by-path/pci-0000:00:1a.0-usb-0:1.2:1.0-scsi-0:0:0:0' /usr/lib/udev/rules.d/60-persistent-storage.rules:55
Jun 28 19:45:16 brainiac systemd-udevd[2134]: RUN 'uaccess' /usr/lib/udev/rules.d/73-seat-late.rules:15
Jun 28 19:45:16 brainiac systemd-udevd[2134]: handling device node '/dev/sr1', devnum=b11:1, mode=0600, uid=0, gid=0
Jun 28 19:45:16 brainiac systemd-udevd[2134]: preserve already existing symlink '/dev/block/11:1' to '../sr1'
Jun 28 19:45:16 brainiac systemd-udevd[2134]: found 'b11:1' claiming '/run/udev/links/\x2fdisk\x2fby-id\x2fusb-USBModem_Disk_1234567890ABCDEF-0:0'
Jun 28 19:45:16 brainiac systemd-udevd[2134]: creating link '/dev/disk/by-id/usb-USBModem_Disk_1234567890ABCDEF-0:0' to '/dev/sr1'
Jun 28 19:45:16 brainiac systemd-udevd[2134]: preserve already existing symlink '/dev/disk/by-id/usb-USBModem_Disk_1234567890ABCDEF-0:0' to '../../sr1'
Jun 28 19:45:16 brainiac systemd-udevd[2134]: found 'b11:1' claiming '/run/udev/links/\x2fdisk\x2fby-path\x2fpci-0000:00:1a.0-usb-0:1.2:1.0-scsi-0:0:0:0'
Jun 28 19:45:16 brainiac systemd-udevd[2134]: creating link '/dev/disk/by-path/pci-0000:00:1a.0-usb-0:1.2:1.0-scsi-0:0:0:0' to '/dev/sr1'
Jun 28 19:45:16 brainiac systemd-udevd[2134]: preserve already existing symlink '/dev/disk/by-path/pci-0000:00:1a.0-usb-0:1.2:1.0-scsi-0:0:0:0' to '../../sr1'
Jun 28 19:45:16 brainiac systemd-udevd[2134]: created db file '/run/udev/data/b11:1' for '/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0/host5/target5:0:0/5:0:0:0/block/sr1'
Jun 28 19:45:16 brainiac systemd-udevd[2134]: passed device to netlink monitor 0x7fe8a56420d0
Jun 28 19:45:16 brainiac systemd-udevd[2134]: seq 1938 processed
Jun 28 19:45:16 brainiac systemd-udevd[278]: cleanup idle workers
Jun 28 19:45:16 brainiac systemd-udevd[2134]: Unload module index
Jun 28 19:45:16 brainiac systemd-udevd[2132]: Unload module index
Jun 28 19:45:16 brainiac systemd-udevd[2134]: Unloaded link configuration context.
Jun 28 19:45:16 brainiac systemd-udevd[2133]: Unload module index
Jun 28 19:45:16 brainiac systemd-udevd[2132]: Unloaded link configuration context.
Jun 28 19:45:16 brainiac systemd-udevd[2133]: Unloaded link configuration context.
Jun 28 19:45:16 brainiac systemd-udevd[278]: worker [2134] exited
Jun 28 19:45:16 brainiac systemd-udevd[278]: cleanup idle workers
Jun 28 19:45:16 brainiac systemd-udevd[278]: worker [2132] exited
Jun 28 19:45:16 brainiac systemd-udevd[278]: cleanup idle workers
Jun 28 19:45:16 brainiac systemd-udevd[278]: worker [2133] exited

mauritiusdadd · 2015-06-28 18:24:13

rasr11 wrote:

I recently updated my systemd to 221-2. Modem doesn't get detected as mass storage.

Sorry, I misread your original post, it seems you have the inverse problem of what I thought. However, that is the expected behaviour since you have usb_modeswitch installed and it will automatically switch your USB Modem from mass storage mode to modem mode. However, you can edit the file /etc/usb_modeswitch.conf and set the option DisableSwitching

# Disable automatic mode switching globally (e.g. to access the original
# install storage)

DisableSwitching=1

so the modem will remain in mass storage mode until you manually invoke usb_modeswitch. Alternatively, if you use that modem only as storage device, you can uninstall the package usb_modeswitch completely.

rasr11 · 2015-06-29 00:45:12

I have uninstalled usb_modeswitch and rebooted the system as you have suggested. But still it is not showing as storage device. lsusb output is still same as above.

Last edited by rasr11 (2015-06-29 00:46:07)

mauritiusdadd · 2015-06-29 06:52:38

I'm sorry but I have no other idea, however can you please post also the output of

lsblk --all -p

using both systemd 219 and systemd 221 and also the output of

lsusb

using only systemd 219 (since you already posted the output of the latter using systemd 221)?

Mr.Elendig · 2015-06-29 10:47:47

Instead of uninstalling usb_modeswitch, try to explicity set the mode you want.

Also: pacman -Q linux && uname -r

Arch Linux

#1 2015-06-24 08:14:01

USB Modem failed to be recognized after recent system update

#2 2015-06-24 08:40:24

Re: USB Modem failed to be recognized after recent system update

#3 2015-06-28 09:50:31

Re: USB Modem failed to be recognized after recent system update

#4 2015-06-28 14:51:10

Re: USB Modem failed to be recognized after recent system update

#5 2015-06-28 18:24:13

Re: USB Modem failed to be recognized after recent system update

#6 2015-06-29 00:45:12

Re: USB Modem failed to be recognized after recent system update

#7 2015-06-29 06:52:38

Re: USB Modem failed to be recognized after recent system update

#8 2015-06-29 10:47:47

Re: USB Modem failed to be recognized after recent system update

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