Ubuntu won't recognise usb drive when running KDE. (works under gnome)

[andy baxter]

andy baxter wrote:
> Hello,
>
> I've just found out that my ubuntu (hardy) system won't recognise my usb 
> hard drive when I plug it in since I switched from Gnome to KDE. It used 
> to work fine, and now it works only intermittently (I think it works 
> when I have had a gnome session running since I last booted, but not 
> when I boot straight into KDE). Is this a known bug, and what can I do 
> about it, other than manually mounting the drives every time they are 
> plugged in?
>
> andy.
>
>   
P.S. dmesg reports:

[21825.435695] usb 2-1: new full speed USB device using uhci_hcd and 
address 7
[21825.610686] usb 2-1: configuration #1 chosen from 1 choice
[21825.640972] scsi9 : SCSI emulation for USB Mass Storage devices
[21825.643098] usb-storage: device found at 7
[21825.643107] usb-storage: waiting for device to settle before scanning
[21830.673785] usb-storage: device scan complete
[21830.676725] scsi 9:0:0:0: Direct-Access     SAMSUNG  
HM160HI               PQ: 0 ANSI: 2 CCS
[21830.692663] sd 9:0:0:0: [sdc] 312581808 512-byte hardware sectors 
(160042 MB)
[21830.695647] sd 9:0:0:0: [sdc] Write Protect is off
[21830.695657] sd 9:0:0:0: [sdc] Mode Sense: 00 38 00 00
[21830.695662] sd 9:0:0:0: [sdc] Assuming drive cache: write through
[21830.700644] sd 9:0:0:0: [sdc] 312581808 512-byte hardware sectors 
(160042 MB)
[21830.703637] sd 9:0:0:0: [sdc] Write Protect is off
[21830.703647] sd 9:0:0:0: [sdc] Mode Sense: 00 38 00 00
[21830.703651] sd 9:0:0:0: [sdc] Assuming drive cache: write through
[21830.703662]  sdc: sdc1 sdc2
[21831.334513] sd 9:0:0:0: [sdc] Attached SCSI disk
[21831.334616] sd 9:0:0:0: Attached scsi generic sg2 type 0

so it's not that the usb system won't recognise the drive.