My guess is that Squeak is missing some property on its window that the X
window manager uses to identify apps. The VM adds several properties to the
window, but the standards keep evolving. See the latest wm-spec
https://specifications.freedesktop.org
It's also possible that the desktop entry needs additional properties. That
entry is not provided by the vm itself (I think) but added by the
debian/ubuntu maintainers. You may have to edit yours.
That said, I myself have used linux only on servers recently (*), so I am
somewhat out of the loop.

Vanessa

(*) as in, the last decade

On Fri, Jul 3, 2020 at 2:05 PM Chris Muller <asqueaker at gmail.com> wrote:

> But the problem is not actually Gnome's window manager -- it works
> beautifully with *every other app* *except* Squeak.
>
> At first I thought it was a chink in Fabio's fantastic *squeak.sh* script,
> but the same problem occurs even when I launch *bin/squeak* directly.
>
> I sense it's something to do with *how* it's being executed by Linux
> and/or Gnome...  The way it's supposed to work is:   when the full
> command-line (I think) is exactly the same, it knows to re-top the window
> for the existing instance invoked by that command, UNLESS the [Shift] key
> is pressed, in which case, it spawns a new process instance of the command
> again (and producing another window running instance).
>
> It works with everything except Squeak...
>
>  - Chris
>
>
> On Fri, Jul 3, 2020 at 4:06 AM K K Subbu <kksubbu.ml at gmail.com> wrote:
>
>> On 03/07/20 9:12 am, Chris Muller wrote:
>> > Has anyone figured out how to get Squeak's behavior to behave in 18.04
>> > like it did in 16.04 and before?
>>
>> They use two different GUI shells. 16.04 uses Unity and 18.04 uses Gnome
>> desktop manager v3 (GDM3). You may install Unity to restore old behavior.
>>
>>    # apt-get install ubuntu-unity-desktop
>>
>> and choose lightdm as the desktop manager when prompted.
>>
>> If you wish to continue with GDM, the keyboard shortcuts are different.
>> Use Win (aka Super) key with tilde to switch between windows of the same
>> app. More keyboard shortcuts are at:
>>
>>
>>
>> https://help.gnome.org/users/gnome-help/stable/shell-keyboard-shortcuts.html.en
>>
>> Also, you may find the 20.04 GDM to be much better than that in 18.04.
>>
>> HTH .. Subbu
>>
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.squeakfoundation.org/pipermail/squeak-dev/attachments/20200703/accb2d32/attachment.html>