after some days without problems it broke again. note that i am not
rebooting this machine, but i plug in and out the external hd regularly.
point is that after commenting out the usb-uhci line in
/etc/hotplug/blacklist it immediatley worked again.

dmesg|tail before commenting out usb-uhci:

---
hub.c: new USB device 00:1d.7-3, assigned address 5
WARNING: USB Mass Storage data integrity not assured
USB Mass Storage device found at 5
usb-storage: host_reset() requested but not implemented
scsi: device set offline - command error recover failed: host 1 channel 0 id
0 lun 0
SCSI disk error : host 1 channel 0 id 0 lun 0 return code = e000002
Current sd08:07: sense key None
 I/O error: dev 08:07, sector 2
EXT3-fs: unable to read superblock
---

after:

---
usb.c: registered new driver usb-storage
scsi1 : SCSI emulation for USB Mass Storage devices
  Vendor: USB 2.0   Model: Storage Device    Rev: 0100
  Type:   Direct-Access                      ANSI SCSI revision: 02
Attached scsi disk sda at scsi1, channel 0, id 0, lun 0
SCSI device sda: 312581808 512-byte hdwr sectors (160042 MB)
 /dev/scsi/host1/bus0/target0/lun0: p1 < p5 p6 p7 >
WARNING: USB Mass Storage data integrity not assured
USB Mass Storage device found at 2
USB Mass Storage support registered.
---


guess it's rather a kernel problem then?

regardsflorian



> 
> > after activating the lines again, leaving the entry in the blacklist, it
> > also worked, with uhci instead of usb-uhci. this definitely didn't work
> Both modules are drivers for UHCI USB controllers.
> 
> > before (for some days, after the update). maybe it now loaded some other
> > drivers necessary for it to work? unfortunately I don't have an output
> of
> > lsmod of the situation before :-(. if you have more suggestions let me
> know.
> Restore the original blacklist, reboot and see what happens.
> 
> I see no difference in the handling of 2.4 coldplugging between -16 and
> -17, so I doubt that there is a bug.
> 
> -- 
> ciao,
> Marco
> 

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