linux-kernel - Re: ASUS ScreenDuo

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Message-ID: <alpine.DEB.1.10.0804031303210.22292@asgard.lang.hm>
Date:	Thu, 3 Apr 2008 13:04:16 -0700 (PDT)
From:	david@...g.hm
To:	Xavier Bestel <xavier.bestel@...e.fr>
cc:	Alan Stern <stern@...land.harvard.edu>, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: ASUS ScreenDuo

On Thu, 3 Apr 2008, Xavier Bestel wrote:

> On jeu, 2008-04-03 at 15:07 -0400, Alan Stern wrote:
>> On Thu, 3 Apr 2008, Xavier Bestel wrote:
>>
>>> On jeu, 2008-04-03 at 11:37 -0400, Alan Stern wrote:
>>>> On Thu, 3 Apr 2008, Xavier Bestel wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> I have an ASUS motherboard with an USB gadget, the ASUS ScreenDUO. It's
>>>>> an independant little lcd screen with buttons, apparently it runs some
>>>>> kind of OS because it can access the net (e.g. to retrieve RSS) even
>>>>> when the computer is off - I guess they mean soft-off.
>>>>>
>>>>> Well, all that is theory because it's under Vista, which I don't have.
>>>>> Under Linux the ScreenDUO is kind-of recognized: it says it's a mass
>>>>> storage device, but I can't mount it (the kernel says it's bound to sdc,
>>>>> but sdc doesn't exist).
>>>>> I'd like to access it. Does anyone know how that thing works ?
>>>>
>>>> What does usbmon show when you modprobe usb-storage?  (The instructions
>>>> for usbmon are in the kernel source file Documentation/usb/usbmon.txt.)
>>
>> ...
>>
>> The ScreenDUO is reporting that no medium is present.  Maybe it needs
>> you to insert some sort of flash memory card before it will work as a
>> mass-storage device.
>
> Ah. Apparently it just waits for some driver from the Windows side (no
> way to insert anything in there).
> I guess it'll just be another useless piece of electronics at home.

for future use, what was it that made everyone decide that this is going 
to show up as a storage device?

with a screen and buttons I would have guessed a HID of some sort.

David Lang
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