Card-Reader Problem -- hal polls results in high system load

[Christian Haul]

Hi all,

I've recently noticed a problem with extremely high system load on my debian sid system. I first tracked it down to the usb_storage kernel module ie removing the module fixes the problem. Now, I get the impression that hald triggers the 
problem by continuesly polling the card reader device.
I've compiled the usb module with debug on and the following shows up in /var/log/debug:

Apr 22 23:16:51 polo kernel: usb-storage: queuecommand called
Apr 22 23:16:51 polo kernel: usb-storage: *** thread awakened.
Apr 22 23:16:51 polo kernel: usb-storage: Command TEST_UNIT_READY (6 bytes)
Apr 22 23:16:51 polo kernel: usb-storage:  00 00 00 00 00 00
Apr 22 23:16:51 polo kernel: usb-storage: Bulk Command S 0x43425355 T 0x128c3 L 0 F 0 Trg 0 LUN 0 CL 6
Apr 22 23:16:51 polo kernel: usb-storage: usb_stor_bulk_transfer_buf: xfer 31 bytes
Apr 22 23:16:51 polo kernel: usb-storage: Status code 0; transferred 31/31
Apr 22 23:16:51 polo kernel: usb-storage: -- transfer complete
Apr 22 23:16:51 polo kernel: usb-storage: Bulk command transfer result=0
Apr 22 23:16:51 polo kernel: usb-storage: Attempting to get CSW...
Apr 22 23:16:51 polo kernel: usb-storage: usb_stor_bulk_transfer_buf: xfer 13 bytes
Apr 22 23:16:51 polo kernel: usb-storage: Status code 0; transferred 13/13
Apr 22 23:16:51 polo kernel: usb-storage: -- transfer complete
Apr 22 23:16:51 polo kernel: usb-storage: Bulk status result = 0
Apr 22 23:16:51 polo kernel: usb-storage: Bulk Status S 0x53425355 T 0x128c3 R 0 Stat 0x1
Apr 22 23:16:51 polo kernel: usb-storage: -- transport indicates command failure
Apr 22 23:16:51 polo kernel: usb-storage: Issuing auto-REQUEST_SENSE
Apr 22 23:16:51 polo kernel: usb-storage: Bulk Command S 0x43425355 T 0x128c4 L 18 F 128 Trg 0 LUN 0 CL 6
Apr 22 23:16:51 polo kernel: usb-storage: usb_stor_bulk_transfer_buf: xfer 31 bytes
Apr 22 23:16:51 polo kernel: usb-storage: Status code 0; transferred 31/31
Apr 22 23:16:51 polo kernel: usb-storage: -- transfer complete
Apr 22 23:16:51 polo kernel: usb-storage: Bulk command transfer result=0
Apr 22 23:16:51 polo kernel: usb-storage: usb_stor_bulk_transfer_buf: xfer 18 bytes
Apr 22 23:16:51 polo kernel: usb-storage: Status code 0; transferred 18/18
Apr 22 23:16:51 polo kernel: usb-storage: -- transfer complete
Apr 22 23:16:51 polo kernel: usb-storage: Bulk data transfer result 0x0
Apr 22 23:16:51 polo kernel: usb-storage: Attempting to get CSW...
Apr 22 23:16:51 polo kernel: usb-storage: usb_stor_bulk_transfer_buf: xfer 13 bytes
Apr 22 23:16:51 polo kernel: usb-storage: Status code 0; transferred 13/13
Apr 22 23:16:51 polo kernel: usb-storage: -- transfer complete
Apr 22 23:16:51 polo kernel: usb-storage: Bulk status result = 0
Apr 22 23:16:51 polo kernel: usb-storage: Bulk Status S 0x53425355 T 0x128c4 R 0 Stat 0x0
Apr 22 23:16:51 polo kernel: usb-storage: -- Result from auto-sense is 0
Apr 22 23:16:51 polo kernel: usb-storage: -- code: 0x70, key: 0x2, ASC: 0x3a, ASCQ: 0x0
Apr 22 23:16:51 polo kernel: usb-storage: Not Ready: Medium not present
Apr 22 23:16:51 polo kernel: usb-storage: scsi cmd done, result=0x2
Apr 22 23:16:51 polo kernel: usb-storage: *** thread sleeping.

This block repeats for every 2 seconds..... and top shows around CPU 40% hi

I've tried to set 
<storage_media_check_enabled>false</storage_media_check_enabled>
in /etc/hal/hald.conf with no apparent success.

Any ideas how to avoid hald polling the card reader every 2 seconds and blocking the system?

TIA,
     Chris.

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