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I have an external DVD-Drive, an USB mouse and an USB hub with three external drives attached to three different USB ports on my Lenovo laptop. After booting and login usually only one or two of those three USB devices is ready to use.

For instance: I can use the mouse and the DVD drive, but the system doesn't really recognize the three external drives connected through the hub. I tried dis- and reconnecting the hub, and I can see in /var/log/syslog, it does recognize the three drives, but not the filesystems. This is also the case if I attach a USB stick.

It typically looks like this for each drive:

Feb 19 21:05:43 Lenovo kernel: [ 1194.951274] usb 3-1: new high-speed USB device number 55 using xhci_hcd
Feb 19 21:05:43 Lenovo kernel: [ 1194.967990] usb 3-1: New USB device found, idVendor=0781, idProduct=5530
Feb 19 21:05:43 Lenovo kernel: [ 1194.967999] usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Feb 19 21:05:43 Lenovo kernel: [ 1194.968005] usb 3-1: Product: Cruzer
Feb 19 21:05:43 Lenovo kernel: [ 1194.968009] usb 3-1: Manufacturer: SanDisk
Feb 19 21:05:43 Lenovo kernel: [ 1194.968013] usb 3-1: SerialNumber: 2*************************C
Feb 19 21:05:43 Lenovo kernel: [ 1194.968811] usb-storage 3-1:1.0: USB Mass Storage device detected
Feb 19 21:05:43 Lenovo kernel: [ 1194.968958] scsi11 : usb-storage 3-1:1.0
Feb 19 21:05:44 Lenovo mtp-probe: checking bus 3, device 55: "/sys/devices/pci0000:00/0000:00:14.0/usb3/3-1"
Feb 19 21:05:44 Lenovo mtp-probe: bus: 3, device: 55 was not an MTP device
Feb 19 21:05:44 Lenovo kernel: [ 1195.967126] scsi 11:0:0:0: Direct-Access SanDisk Cruzer 1.20 PQ: 0 ANSI: 5
Feb 19 21:05:44 Lenovo kernel: [ 1195.967761] sd 11:0:0:0: Attached scsi generic sg3 type 0
Feb 19 21:05:44 Lenovo kernel: [ 1195.968812] sd 11:0:0:0: [sdc] 125031680 512-byte logical blocks: (64.0 GB/59.6 GiB)
Feb 19 21:05:44 Lenovo kernel: [ 1195.971767] sd 11:0:0:0: [sdc] Write Protect is off
Feb 19 21:05:44 Lenovo kernel: [ 1195.971777] sd 11:0:0:0: [sdc] Mode Sense: 43 00 00 00
Feb 19 21:05:44 Lenovo kernel: [ 1195.972152] sd 11:0:0:0: [sdc] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
Feb 19 21:05:44 Lenovo kernel: [ 1195.983379] sdc: sdc1
Feb 19 21:05:44 Lenovo kernel: [ 1195.985118] sd 11:0:0:0: [sdc] Attached SCSI removable disk

BUT: when i then dis- and then reconnect ANOTHER USB device (the DVD drive for instance, which isn't even mounted), the system almost immediately recognizes the filesytem(s) and mounts the drive(s). Syslog then (and only then) goes on like this:

Feb 19 21:06:58 Lenovo udevd[2611]: timeout '/sbin/blkid -o udev -p /dev/sdc'
Feb 19 21:06:58 Lenovo udevd[2611]: timeout 'udisks-part-id /dev/sdc'
Feb 19 21:06:58 Lenovo ntfs-3g[3033]: Version 2012.1.15AR.1 external FUSE 28
Feb 19 21:06:58 Lenovo ntfs-3g[3033]: Mounted /dev/sdc1 (Read-Write, label "Cruzer64", NTFS 3.1)
Feb 19 21:06:58 Lenovo ntfs-3g[3033]: Cmdline options: rw,nosuid,nodev,uhelper=udisks,uid=1000,gid=1000,dmask=0077,fmask=0177
Feb 19 21:06:58 Lenovo ntfs-3g[3033]: Mount options: rw,nosuid,nodev,uhelper=udisks,allow_other,nonempty,relatime,default_permissions,fsname=/dev/sdc1,blkdev,blksize=4096
Feb 19 21:06:58 Lenovo ntfs-3g[3033]: Global ownership and permissions enforced, configuration type 7

Any ideas on this?

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