On Fri, May 14, 2010 at 15:51, Nick Bowler <nbowler@xxxxxxxxxxxxxxxx> wrote:
> On 09:36 Fri 14 May , Martin Pitt wrote:
>> Nick Bowler [2010-05-13 17:37 -0400]:
>> > KERNEL[1273786356.346839] change /devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0 (scsi)
>> > KERNEL[1273786361.166466] change /devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0/block/sr0 (block)
>>
>> Seems this is a 5 second interval.
>
> I suspect it's tied to the normal spindown time for the drive (the drive
> does _start_ to spin down, after all, before it gets kicked back into
> full gear).
>
>> Both udisks and hal poll CD-ROMs
>> every two seconds, so at first sight this looks slightly unrelated.
>> But those are the two that actually generate polling events. Does the
>> issue also go away after killing hald and udisks-daemon (but leaving
>> udevd running)?
>
> Neither hald nor udisks-daemon are even installed on the machine, let
> alone running. This occurs whilst running _nothing_ other than udevd
> (as well as during normal operation):
>
> boot with init=/bin/sh
>
> mount -t proc proc proc
> mount -t sysfs sysfs sys
> mount -t tmpfs udev dev
> modprobe sr-mod
>
> (insert cd: after a few seconds it spins down normally)
>
> udevd --daemon
> udevadm trigger
>
> (remove/insert cd: it never spins down; this is when I ran udevadm
> monitor)
>
> killall udevd
>
> (after a few seconds the cd spins down normally)
Sounds odd, that the kernel/the device seems to flip the media present
bit, and sends events for that after every access.
Does cdrom_id work as expected otherwise? What does:
/lib/udev/cdrom_id --debug /dev/sr0
print?
Does running cdrom_id spin up the drive?
There is a call to /sbin/blkid in:
/lib/udev/rules.d/60-persistent-storage.rules
with:
KERNEL=="sr*", IMPORT{program}="/sbin/blkid ...
If you comment that out, does the issue go away?
Kay
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