* how to firing device event when SD card inserting usb card reader
@ 2014-06-26 14:47 loody
2014-06-26 15:57 ` Alan Stern
0 siblings, 1 reply; 3+ messages in thread
From: loody @ 2014-06-26 14:47 UTC (permalink / raw)
To: linux-scsi, linux-usb
hi all:
I try below flow:
1. plug in usb card reader
2. wait 2 seconds
3. plug in SD card
on ubuntu PC system, the udev can get SD plug in event
but on my embedded system, there is no udev plug event when SD plug in.
Is this issue related to media change command?
if so, should I enable kernel config or do anything in user mode program?
thanks for your help in advance,
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: how to firing device event when SD card inserting usb card reader
2014-06-26 14:47 how to firing device event when SD card inserting usb card reader loody
@ 2014-06-26 15:57 ` Alan Stern
2014-07-04 11:23 ` loody
0 siblings, 1 reply; 3+ messages in thread
From: Alan Stern @ 2014-06-26 15:57 UTC (permalink / raw)
To: loody; +Cc: SCSI development list, USB list
On Thu, 26 Jun 2014, loody wrote:
> hi all:
> I try below flow:
> 1. plug in usb card reader
> 2. wait 2 seconds
> 3. plug in SD card
>
> on ubuntu PC system, the udev can get SD plug in event
> but on my embedded system, there is no udev plug event when SD plug in.
>
> Is this issue related to media change command?
> if so, should I enable kernel config or do anything in user mode program?
>
> thanks for your help in advance,
What does usbmon show?
Alan Stern
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: how to firing device event when SD card inserting usb card reader
2014-06-26 15:57 ` Alan Stern
@ 2014-07-04 11:23 ` loody
0 siblings, 0 replies; 3+ messages in thread
From: loody @ 2014-07-04 11:23 UTC (permalink / raw)
To: Alan Stern; +Cc: SCSI development list, USB list
hi Alan:
2014-06-26 23:57 GMT+08:00 Alan Stern <stern@rowland.harvard.edu>:
> On Thu, 26 Jun 2014, loody wrote:
>
>> hi all:
>> I try below flow:
>> 1. plug in usb card reader
>> 2. wait 2 seconds
>> 3. plug in SD card
>>
>> on ubuntu PC system, the udev can get SD plug in event
>> but on my embedded system, there is no udev plug event when SD plug in.
>>
>> Is this issue related to media change command?
>> if so, should I enable kernel config or do anything in user mode program?
>>
>> thanks for your help in advance,
>
> What does usbmon show?
after we enable CONFIG_SCSI_MULTI_LUN, we can udevent when SD plug in
card reader.
appreciate your kind help,
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2014-07-04 11:23 UTC | newest]
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2014-06-26 14:47 how to firing device event when SD card inserting usb card reader loody
2014-06-26 15:57 ` Alan Stern
2014-07-04 11:23 ` loody
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