[systemd-devel] Antw: [EXT] [PATCH] usb-storage: Add quirk to defeat Kindle's automatic unload

[Ulrich Windl]

>>> Alan Stern <stern at rowland.harvard.edu> schrieb am 18.03.2021 um 16:03 in
Nachricht <20210318150309.GB527768 at rowland.harvard.edu>:
> On Thu, Mar 18, 2021 at 08:10:56AM +0100, Ulrich Windl wrote:
>> >>> Alan Stern <stern at rowland.harvard.edu> schrieb am 17.03.2021 um 20:06 in
>> Nachricht <20210317190654.GA497856 at rowland.harvard.edu>:
>> > Matthias reports that the Amazon Kindle automatically removes its
>> > emulated media if it doesn't receive another SCSI command within about
>> > one second after a SYNCHRONIZE CACHE.  It does so even when the host
>> > has sent a PREVENT MEDIUM REMOVAL command.  The reason for this
>> > behavior isn't clear, although it's not hard to make some guesses.
>> 
>> Actually I think Amazon should fix the firmware.
> 
> You are free to suggest to them that they change it.  Even if you do 
> find the right people to ask about this, I'd be very surprised if they 
> agreed to make the change.
> 
>> It seems the main goal was to prevent the use of open software to manage the
>> content.
> 
> This is guesswork on your part, and I disagree.  I think the main goal 

Yes, it's guessing, but the real story is: Recently I tried different bluetooth "ear plugs with noise cancelling". Those from Samsung just worked out of the box (regarding audio output at least), while those from Sony did not.
Now you can decide to patch the kernel, or simply buy the other product...

> was to improve the user experience by making the Kindle return to normal 
> operating mode automatically when file transfers are finished, rather 
> than requiring the user to do something extra.  But that's also just a 
> guess.
> 
> Alan Stern