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Re: [Qemu-devel] [PATCH v2] usb: Remove legacy -usbdevice option

From: Paolo Bonzini
Subject: Re: [Qemu-devel] [PATCH v2] usb: Remove legacy -usbdevice option
Date: Thu, 4 Jan 2018 18:57:18 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.5.0

On 04/01/2018 18:45, Samuel Thibault wrote:
> Paolo Bonzini, on jeu. 04 janv. 2018 18:11:00 +0100, wrote:
>> On 04/01/2018 16:56, Samuel Thibault wrote:
>>>> However, adding magic to "-device usb-braille" that creates both a
>>>> front-end and a back-end is completely the opposite of sane...
>>> Well, this is also what happens with -device usb-mouse, usb-kbd etc.:
>>> they also plug with keyboard & mouse pipes of the qemu graphical
>>> frontend. braille is just the same vein for the user.
>> No, they don't create a new UI object magically that wasn't there
>> before.  They just let you add a device, e.g. a USB tablet, that listens
>> on an _existing_ UI (GTK+ or SDL or similar).
> Technically for the qemu developper, yes.
> But for the user, no.

That's not true.   With or without "-usbdevice tablet", you use the same
mouse or keyboard device as the input source.


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