On Mon, 26 Apr 2010, Sergey Senozhatsky wrote: > Hello, > MiniSD card mounted through the USB card reader. > > .34-rc5-git6 > > kernel: [ 5746.170226] scsi12 : usb-storage 2-2:1.0 > kernel: [ 5747.174113] scsi scan: INQUIRY result too short (5), using 36 > kernel: [ 5747.174128] scsi 12:0:0:0: Direct-Access PQ: 0 ANSI: 0 > kernel: [ 5747.180721] sd 12:0:0:0: Attached scsi generic sg2 type 0 > kernel: [ 5747.190490] sd 12:0:0:0: [sdb] 2012160 512-byte logical blocks: (1.03 GB/982 MiB) > kernel: [ 5747.193398] sd 12:0:0:0: [sdb] Write Protect is off > kernel: [ 5747.193403] sd 12:0:0:0: [sdb] Mode Sense: 00 06 00 00 > kernel: [ 5747.193406] sd 12:0:0:0: [sdb] Assuming drive cache: write through > kernel: [ 5747.207116] sd 12:0:0:0: [sdb] Assuming drive cache: write through > kernel: [ 5747.207125] sdb: sdb1 > kernel: [ 5747.233099] sd 12:0:0:0: [sdb] Assuming drive cache: write through > kernel: [ 5747.233112] sd 12:0:0:0: [sdb] Attached SCSI removable disk > kernel: [ 5758.495211] FAT: utf8 is not a recommended IO charset for FAT filesystems, filesystem will be case sensitive! > kernel: [ 6360.626229] INFO: task umount:4235 blocked for more than 120 seconds. > kernel: [ 6360.626237] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Is this repeatable? Can you do this with CONFIG_USB_DEBUG enabled? And acquire a usbmon trace at the same time (see Documentation/usb/usbmon.txt)? Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html