GNU bug report logs - #61710
30.0.50; frame parameter `(fullscreen . maximized)' does not work with PGTK and emacsclient --create-frame

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Alynx Zhou <alynx.zhou <at> suse.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 30.0.50; frame parameter `(fullscreen . maximized)' does not work
 with PGTK and emacsclient --create-frame
Date: Wed, 22 Feb 2023 21:27:42 +0800

This problem could be reproduced with those minimal steps:

1. `emacs -Q --eval "(add-to-list 'default-frame-alist '(fullscreen . 
maximized))" --daemon`
2. `emacsclient --create-frame WHATEVER_FILES`

What's expected:

Every frame created by emacsclient should be maximized.

What's happened:

Emacs's content only fills part of the screen space, the frame looks 
like in full screen state (no window shadows, you cannot maximize it 
manually), except the frame size is incorrect.

I am using GNOME Shell 43.3 Wayland session. It also has some other 
strange behaviors which may be helpful to debug:

- Emacs itself cannot reproduce this bug, only emacsclient.
- If you restore the misbehave window, and maximize it again, it works 
fine then.
- If you open whatever files with `emacsclient --create-frame 
WHATEVER_FILES`, this bug should happen, but if emacs frame starts with 
scratch buffer first, this bug cannot be reproduced (for example don't 
appened files to emacsclient's arguments, or you opened a _soft linked_ 
file, then emacs will _display scratch buffer and asking you whether you 
follow link_). That's the most strange behavior.
- This bug cannot be reproduced under X11 session.

Thanks ahead.

Alynx Zhou

---

In GNU Emacs 30.0.50 (build 10, x86_64-pc-linux-gnu, GTK+ Version
 3.24.36, cairo version 1.17.8) of 2023-02-22 built on camelot
Repository revision: cac13e360547f95ec64d34f38003dfc7ff1a97ee
Repository branch: makepkg
System Description: Arch Linux

Configured using:
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Load-path shadows:
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Message #8 received at 61710 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Alynx Zhou <alynx.zhou <at> suse.com>
Cc: 61710 <at> debbugs.gnu.org
Subject: Re: bug#61710: 30.0.50;
 frame parameter `(fullscreen . maximized)' does not work with PGTK
 and emacsclient --create-frame
Date: Wed, 22 Feb 2023 17:31:48 +0200

> Date: Wed, 22 Feb 2023 21:27:42 +0800
> From:  Alynx Zhou via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs <at> gnu.org>
> 
> This problem could be reproduced with those minimal steps:
> 
> 1. `emacs -Q --eval "(add-to-list 'default-frame-alist '(fullscreen . 
> maximized))" --daemon`

I think any customizations that need a real display should be done
from server-after-make-frame-hook, not at startup time.  Did you try
that?

Message #11 received at 61710 <at> debbugs.gnu.org (full text, mbox):

From: Alynx Zhou <alynx.zhou <at> suse.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 61710 <at> debbugs.gnu.org
Subject: Re: bug#61710: 30.0.50; frame parameter `(fullscreen . maximized)'
 does not work with PGTK and emacsclient --create-frame
Date: Thu, 23 Feb 2023 00:34:43 +0800

On 2/22/23 23:31, Eli Zaretskii wrote:
>> Date: Wed, 22 Feb 2023 21:27:42 +0800
>> From:  Alynx Zhou via "Bug reports for GNU Emacs,
>>   the Swiss army knife of text editors" <bug-gnu-emacs <at> gnu.org>
>>
>> This problem could be reproduced with those minimal steps:
>>
>> 1. `emacs -Q --eval "(add-to-list 'default-frame-alist '(fullscreen .
>> maximized))" --daemon`
> 
> I think any customizations that need a real display should be done
> from server-after-make-frame-hook, not at startup time.  Did you try
> that?

Well, I did not try the hook, however, I think first this just adds 
default parameter, and it actually makes effect when `make-frame` is 
called, at that time client already sends server its display. Plus, GTK 
allows to set maximized before window is shown, this means the window 
will maximized once mapped, which is just what I want.

I also tried the X11 GTK version, it does not have this bug.

Alynx Zhou

Message #14 received at 61710 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Alynx Zhou <alynx.zhou <at> suse.com>
Cc: 61710 <at> debbugs.gnu.org
Subject: Re: bug#61710: 30.0.50; frame parameter `(fullscreen . maximized)'
 does not work with PGTK and emacsclient --create-frame
Date: Wed, 22 Feb 2023 19:12:11 +0200

> Date: Thu, 23 Feb 2023 00:34:43 +0800
> Cc: 61710 <at> debbugs.gnu.org
> From: Alynx Zhou <alynx.zhou <at> suse.com>
> 
> On 2/22/23 23:31, Eli Zaretskii wrote:
> >> Date: Wed, 22 Feb 2023 21:27:42 +0800
> >> From:  Alynx Zhou via "Bug reports for GNU Emacs,
> >>   the Swiss army knife of text editors" <bug-gnu-emacs <at> gnu.org>
> >>
> >> This problem could be reproduced with those minimal steps:
> >>
> >> 1. `emacs -Q --eval "(add-to-list 'default-frame-alist '(fullscreen .
> >> maximized))" --daemon`
> > 
> > I think any customizations that need a real display should be done
> > from server-after-make-frame-hook, not at startup time.  Did you try
> > that?
> 
> Well, I did not try the hook, however, I think first this just adds 
> default parameter, and it actually makes effect when `make-frame` is 
> called, at that time client already sends server its display. Plus, GTK 
> allows to set maximized before window is shown, this means the window 
> will maximized once mapped, which is just what I want.

But what exactly "maximized" means depends on the display geometry,
and the daemon doesn't have access to that, since it doesn't
initialize the X connection.

> I also tried the X11 GTK version, it does not have this bug.

Then maybe the problem is not where I think it is.  Sorry.

Message #17 received at 61710 <at> debbugs.gnu.org (full text, mbox):

From: Alynx Zhou <alynx.zhou <at> suse.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 61710 <at> debbugs.gnu.org
Subject: Re: bug#61710: 30.0.50; frame parameter `(fullscreen . maximized)'
 does not work with PGTK and emacsclient --create-frame
Date: Thu, 23 Feb 2023 01:28:27 +0800

On 2/23/23 01:11, Eli Zaretskii wrote:
>> Date: Thu, 23 Feb 2023 00:34:43 +0800
>> Cc: 61710 <at> debbugs.gnu.org
>> From: Alynx Zhou <alynx.zhou <at> suse.com>
>>
>> On 2/22/23 23:31, Eli Zaretskii wrote:
>>>> Date: Wed, 22 Feb 2023 21:27:42 +0800
>>>> From:  Alynx Zhou via "Bug reports for GNU Emacs,
>>>>    the Swiss army knife of text editors" <bug-gnu-emacs <at> gnu.org>
>>>>
>>>> This problem could be reproduced with those minimal steps:
>>>>
>>>> 1. `emacs -Q --eval "(add-to-list 'default-frame-alist '(fullscreen .
>>>> maximized))" --daemon`
>>>
>>> I think any customizations that need a real display should be done
>>> from server-after-make-frame-hook, not at startup time.  Did you try
>>> that?
>>
>> Well, I did not try the hook, however, I think first this just adds
>> default parameter, and it actually makes effect when `make-frame` is
>> called, at that time client already sends server its display. Plus, GTK
>> allows to set maximized before window is shown, this means the window
>> will maximized once mapped, which is just what I want.
> 
> But what exactly "maximized" means depends on the display geometry,
> and the daemon doesn't have access to that, since it doesn't
> initialize the X connection.
> 

I've read server.el for the whole afternoon, and I think when 
`make-frame` is called, Emacs server already gets Wayland Display from 
client (this bug only happens in Wayland as I mentions).

And actually Emacs doesn't need to get display geometry before maximize, 
in Wayland it works in this way: a window requires to maximize to 
compositor, and compositor decides to make it maximize, it will then 
send the width and height to window via configure event, and all of 
those are handled by GTK so I don't think Emacs should take care of 
those actually.

Plus, if I don't open file via emacsclient (just call `emacsclient 
--create-frame`), the newly create frame is maximized properly, so I 
guess that it is not a display related issue.

>> I also tried the X11 GTK version, it does not have this bug.
> 
> Then maybe the problem is not where I think it is.  Sorry.

Nevermind, I am appreciate that you take time on my problem. :-)

Alynx

Message #20 received at 61710 <at> debbugs.gnu.org (full text, mbox):

From: Alynx Zhou <alynx.zhou <at> suse.com>
To: 61710 <at> debbugs.gnu.org
Subject: Re: bug#61710: 30.0.50; frame parameter `(fullscreen . maximized)'
 does not work with PGTK and emacsclient --create-frame
Date: Fri, 24 Feb 2023 18:21:44 +0800

So, after taking another afternoon on commenting code or adding 
`message`, the problem is located at the last 2 lines of 
`server-switch-buffer`:

```
    (when server-raise-frame
      (select-frame-set-input-focus (window-frame)))))
```

When I set `server-raise-frame` to `nil`, the newly created frame is 
maximized properly, I am not sure why `select-frame-set-input-focus` 
causes such a bug, but I guess it is related on how PGTK handles focus 
on Wayland (actually I think it should do nothing, because Wayland 
clients are not allowed to grab focus explicitly, but there must be some 
interesting things).

I'd like to find out what's wrong with it tomorrow, but at least I have 
a workaround now!

Alynx

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