tablet as a second monitor on linux

Alex Deucher alexdeucher at
Wed Dec 19 05:48:04 PST 2012

On Wed, Dec 19, 2012 at 3:21 AM, Adam GROSZER <agroszer.ll at> wrote:
> On 12/18/2012 08:44 PM, Alex Deucher wrote:
>> On Tue, Dec 18, 2012 at 1:30 PM, Adam Groszer <agroszer.ll at>
>> wrote:
>>> Hello,
>>> I'm trying to use an android tablet as a secondary monitor for my laptop.
>>> Secondary monitor as one physical would be plugged into the VGA port.
>>> Googling resulted in no concrete solution.
>> Does the tablet have a VGA input port and can it act as a monitor or
>> are you asking about using it as a virtual second monitor?  If the
>> latter, you can probably play with xdmx assuming you can get an
>> xserver running on the tablet, however, there's no real official
>> solution that I know of.  Anything will basically be a hack.
>> Alex
> No VGA, I definitely need it as virtual, any communication can go only over
> There's an xserver for android, but it's rather incomplete.
> Starting xfwm4 with it burps a lot of errors.
> As it looks the most solid way to mirror a screen to a tablet is vnc.
> The question is, how to create the secondary headless virtual monitor with
> X. I'm lost there.
> (Maybe I'll force with xrandr to display that secondary on the VGA against
> no real monitor connected.
> Something along:
> or
> Because what I actually want is like having a second monitor, but it's
> "attached" via vnc-TCP/IP)

As I said, originally, you need something like xdmx:
It's basically a proxy xserver that connects to xservers on multiple
boxes and presents the result as a single xserver.


>>> With some help of a friend, the script kind
>>> of works. (on xubuntu 11.10)
>>> Problems:
>>> - the XFCE top panel gets extended to the "tablet monitor"
>>> - the mouse pointer cannot enter the "tablet monitor"
>>> - both above together cause the panel to be inaccessible
>>> Any pointers are welcome, how to solve this.
>>> --
>>> Best regards,
>>>   Adam
> --
> Best regards,
> --
> Quote of the day:
> It's hard to remain true to a changing self.

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