Re: [gentoo-user] Re: Can't paste from selection in gtk-3 apps

[Alan McKinnon]

On 18/09/2015 16:11, J. Roeleveld wrote:
> On Friday 18 September 2015 13:23:49 Grant Edwards wrote:
>> On 2015-09-18, J. Roeleveld <joost@××××××××.org> wrote:
>>> On Thu, September 17, 2015 16:33, Grant Edwards wrote:
>>>> On 2015-09-17, Grant Edwards <grant.b.edwards@×××××.com> wrote:
>>>>> On 2015-09-17, J. Roeleveld <joost@××××××××.org> wrote:
>>>>>>>> I use 2 screens extensively and never experienced any issues like you
>>>>>>>> describe.
>>>>>>>
>>>>>>> And you can select/paste from one screen to another where the source
>>>>>>> is a gtk-3 app?
>>>>>>
>>>>>> Not sure, need to test with a gtk-3 app.
>>>>>>
>>>>>> I run KDE myself.
>>>>>>
>>>>>>> I should clarify that I mean "screen" in the strict X11 usage.  Using
>>>>>>> Xinerama or the like to spread a single desktop across multiple
>>>>>>> monitors is still a single screen setup.  I'm trying to select text
>>>>>>> on DISPLAY=:0.0 and paste it on DISPLAY=:0.1
>>>>>>
>>>>>> Not using my desktop atm.
>>>>>> What does Xorg do by default when it detects multiple screens?
>>>>>
>>>>> Not sure -- I'll have to give it a try. IIRC, it just uses the first
>>>>> one.
>>>>
>>>> At least on my machine, if I start up X11 without a configuration
>>>> file it only uses one of my three monitors.  That behavior may depend
>>>> on which boards are installed and which board/driver is found first.
>>>
>>> On my desktop:
>>>
>>> $ cat /etc/X11/xorg.conf
>>> Section "Device"
>>>
>>>         Identifier  "Card0"
>>>         Driver      "nvidia"
>>>         BusID       "PCI:2:0:0"
>>>
>>> EndSection
>>>
>>> (Without this, X doesn't start, complaining it can't find VESA)
>>>
>>> echo $DISPLAY returns the same on both desktops.
>>
>> That is a single X11 screen spread across two physical monitors.  It
>> will not exhibit the gtk-3 selection bug.
>>
>> Are you sure you have two desktops and it's not just a single desktop
>> that is spread across two monitors?  Can you drag a window from one
>> monitor to the other?  If you can, then it's a single desktop.
>
> Yes, I can.
> When I maximize a window, it's only on 1 screen.
>
> This is how it seems "right" to me.
>
> Why would I want it to be different? Eg. windows can't be moved between
> screens? I don't see the point of having more than 1 screen in that case.

There's a few reasons you might want more than one screen. Primary one
is two heads and two video cards with different resolutions and dpi.
Xinerama and big desktop et al will use the lower setting for both.

Some folk have 2 screens just because they've always done it that way
for years and don't want to change

These days the usual case is one video card with more than one output so
you connect identical monitors to each. For that, one big desktop makes
sense.


>
> --
> Joost
>
>


-- 
Alan McKinnon
alan.mckinnon@×××××.com