[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Alberts Muktupāvels]

*** This bug is a duplicate of bug 1614050 ***
https://bugs.launchpad.net/bugs/1614050

** This bug has been marked a duplicate of bug 1614050
   Window depth order messed up

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  untraceable serious bug in metacity 3.18

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Alberts Muktupāvels]

At this point only valid bug here might be / is problem when all windows
are hidden under desktop (?) window... I doubt that this is problem with
configuration.

** Changed in: metacity (Ubuntu)
   Status: Incomplete => Confirmed

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[dino99]

@dronus

check with some genuine config, to know if that still exist:
- purge compiz
- purge metacity
- set default theme (adwaita for ubuntu, does not know for others) via the 
tweak tool

- reinstall compiz (only the default ubuntu choice; no ccsm nor other plugins 
which are mainly not maintained since ages)
- reinstall metacity

- then logout and reboot;

note: set to "incomplete" as its not your report, and the OP has not
answered to #83

** Changed in: metacity (Ubuntu)
   Status: In Progress => Incomplete

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[dronus]

While this bug don't happen very often to me, it behaves exactly as
described.

Some clarifications:

-It is not linked to Nvidia graphics, but happens on Intel too.

-It is definetely about graphical window depth order. The "hidden"
applications can be focused and work as expected. They even change the
mouse cursor according to their actions. They are just obscured by the
nautlilus or nemo desktop.

-If nautilus or nemo is killed, all other applications reappear, until
nautlilus or nemo is run again, in which case they are obscured again.
This can be repeated reliable after the bug once triggered.

-If metacity is restarted, the bug is gone until it is triggered again
by unknown reason. Trigger is likely the apperance of a new window (I
had the bug triggered on the failing appearance of some delete
verification request dialog).

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[dronus]

This may be related to
https://bugs.launchpad.net/ubuntu/+source/metacity/+bug/1614050 , which
is about wrong window depth ordering. The original bug described (all
windows closed) already turned out as "all windows hidden" here. It
seems the desktop (featuring a background image) may pop in front of all
other windows.

The bug linked here describes an almost similiar situation, where the
desktop icons appear in front of all windows, this has likely the same
reason except the desktop background itself is transparent in this case.

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Alberts Muktupāvels]

Can you test Metacity from my PPA? It might fix titlebar bug.

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

This NV Card (with Nouveau driver) also has window missing issue.

#lsmod | grep NV
01:00.0 VGA compatible controller: NVIDIA Corporation GF119 [GeForce GT 620 
OEM] (rev a1)

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Re: [Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Alberts Muktupāvels]

On Mon, Jun 27, 2016 at 2:06 PM, Cui Wei  wrote:

> 1) both of the output is 'Ambiance', and I figure out the differences:
> with Ambiance theme ->
>
> metacity have 1px-border to resize for left/right/bottom, 0px-border to
> resize for top;
> Marco have 1px-border to resize for left/right/bottom, 3px-border to
> resize for top;
>

So only bug here is that without compositing manager you can not resize
using titlebar (corners still can be for resizing)... I will fix this, just
need find commit when I introduced this regression. Please open new bug for
this.

So it seems that Marco is more comfortable to do resizing operation, and
> do you know how to modify Ambiance theme to make metacity able to resize
> on top edge?
>

Only true if Metacity used without compositing manager and only because of
bug. Otherwise Metacity and Marco works same without compositing manager
and Metacity works better with compositing manager because you have extra
invisible resize area - so you can have nice 1px border, but resize area is
11px...

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

1) both of the output is 'Ambiance', and I figure out the differences:
with Ambiance theme ->

metacity have 1px-border to resize for left/right/bottom, 0px-border to resize 
for top;
Marco have 1px-border to resize for left/right/bottom, 3px-border to resize for 
top;

So it seems that Marco is more comfortable to do resizing operation, and
do you know how to modify Ambiance theme to make metacity able to resize
on top edge?

2) It works for left/right/bottom edges.

3) GTX 850M/(Others will be posted some days later because I am
unavailable to those laptop at the moment.)

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Alberts Muktupāvels]

1) I am downloading ubuntu mate iso - will install in VirtualBox to see that 
myself, but unless I have missed something Marco can be resized only using 
border... Are you sure that Metacity and Marco use same theme? Post output:
- gsettings get org.gnome.metacity theme
- gsettings get org.mate.Marco.general theme

2) You could copy Ambinace theme to your home directory and edit
Ambiance/metacity-1/metacity-theme-1.xml. Change left_width, right_width
and bottom_height from 1 to 3.

3) Does all NV-Card laptops have same nvidia card? If not post all
models.

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

1) running Marco without composit manager is easy to resize window on
all edges of a window (including top/bottom/left/width), and it seems
the border to resize is about 3px - 5px.

2) modify theme will only work for CSD window. Apps such as gnome-
terminal is still hard to resize

3) Metacity with composit manager still have window-missing problem on
all of my NV-Card laptops, but other Card such as Intel/ATI don't have
this issue. Lastest Marco (no matter compiled with GTK2/GTK3) still
works well on all kinds of Video Card, and never have window missing
problem.

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Alberts Muktupāvels]

1) So this is not problem and/or can be considered as won't fix. When
using Metacity without compositing manager there is no way to add extra
"space" for resize cursor area. Your only option is to search for theme
that has bigger borders. I am quite surprised that you wrote that Marco
works well... Marco has this 1px resize problem with / or without
compositing manager.

2) You can try to modify theme - changing borders from 1px to bigger
size or just use theme that has bigger borders.

3) This was not about resize problem. This question was about missing /
not visible windows. Did you try Intel only mode? Did you see this
problem on other laptops you just mentioned?

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

1) I can resize gedit/.. at the left/right/bottom edge of the window,
but resizing is hard because 1px edge is too thing to catch. And I
cannot resize them via the top edge of the window.

2) I am using Ambiance, without composit manager.

3) I have tried on serveral laptop (DELL/Acer/..) and all of them are
hard to resize a window.

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Alberts Muktupāvels]

You did not answer my questions...
1) You can not resize gedit and/or gnome-terminal even using titlebar where 
resize area is bigger?
2) What theme are you using? Default - Ambiance?
3) Have you tried Intel only mode? It is important to understand if it is or is 
not problem with nouveau...

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

Still have most of the above issues.

marco Package in Ubuntu Yakkety is using Gtk3 by default, and it works
well.

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Alberts Muktupāvels]

Just disabled compositing-manager and I can resize gnome-terminal and
gedit in my GNOME Flashback (Metacity) session on Ubuntu 16.04 with all
updated installed. Note that border is only 1px big at least with
Ambiance. So you need to place your cursor on that 1px border to get
resize cursor. This is reason why invisible borders was added. Or you
don't get resize cursor even on titlebar where this size is bigger?

Do you still have missing windows and/or titlebar problem? Have you
tried intel only mode?

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

@Alberts,

Hi, do you know why GUI applications (such as gnome-terminal/gedit)
can't be resized when metacity is under "no-composite" mode? Can you fix
it?

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Alberts Muktupāvels]

Then please try to use Intel only mode. Or if you have access to other
nvidia card - can you reproduce your problems?

I still think that this might be problem with nouveau and just because
other window managers works does not mean that this is metacity problem.
Even if it is bug in metacity it is / will be hard to fix if I can not
reproduce it. :( I even asked friend if he has laptop with same card...

Do you have this problem also with Metacity 3.16? If so it might be
related to changes that was needed to add invisible borders.

Marco has no invisible borders so it does not have all changes that are
in metacity. If they will ever add invisible borders then most likely
you will have same problem.

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

Proprietary driver is a little complex to install due to dual Video
Card.

And I don't think the key point is nouveau because
marco/metacity3.14/compiz don't have window missing issue.

As for current metacity 3.18.4-0ubuntu0.1, window title shadow unerased
when switching Tab-page still exists (#46), though it is not a serious
problem. And non-alphabet title displayment problem(#67) has been fixed!

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

Hi, after upgrading to metacity 3.18.4-0ubuntu0.1.

It will never crash. But window-missing issue still exists. I think
window-missing issue only happens on NVDIA Card and using nouveau
driver.

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Alberts Muktupāvels]

I can not reproduce your problems... Have you tried to use proprietary
driver?

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

@Alberts Muktupāvels

Hi, metacity (as well as marco from mate) have same issue about
displaying non-alphabet title, for example:

mkdir -p ~/中中中
firefox ~/中中中

when firefox is not maximized, the titlebar region only displays around
half of the text.

when executing "compiz --replace"

most of the text will be fully displayed in titlebar region.

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

Another bug (let's call it Issue-5)  that metacity 3.18 has while marco
(no matter gtk2/grk3) doesn't has, is that some window is lacking
rendering by metacity once it is launched from gnome-panel. Gedit always
lack rendering. See the image which is using metacity 3.18.[any].

Replacing with marco and you can see those windows never lackes
rendering (their body view)


** Attachment added: "VirtualBox_minion1_01_05_2016_03_34_39.png"
   
https://bugs.launchpad.net/ubuntu/+source/metacity/+bug/1538111/+attachment/4652355/+files/VirtualBox_minion1_01_05_2016_03_34_39.png

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

Due to marco depending on serveral mate package, you could try this
version that build gtk3 directly, and compare the differences with
metacity 3.18.4, considering the above 4 issues.

sudo add-apt-repository ppa:ghostplant/testing
sudo apt-get update
sudo apt-get source gmarco

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

3.18.3+git20160418-1ubuntu3 - This version contains all of these bugs:

1) the shadow of Charactors from Window title unerased;

2) Window missing bug;

3) /usr/bin/metacity Process Crash (I thought it doesn't crash before,
but I think I am wrong because I met two crashes of this version)

4) When resizing a newly-launched window, it is not as fluent as I think
for the first 2 to 3 second. (Actually it is not an isse that ONLY
happen in 3.18.3+git20160418-1ubuntu3, but  3.18.3,  3.18.2, ..)

===

"apt-get source marco" and recompiling it with "--with-gtk=3.0"

1) No shadow from window title;

2) no crash;

3) no window missing;

4) resizing is very very smooth and quick, in addiction, seems to cost
lower memory.

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Dmitry Shachnev]

Anthony, can you comment on that bug and mark it as verification-done
then please?

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Anthony Harrington]

I was experiecing bug 1573478, seems to be fixed in 1:3.18.4-0ubuntu0.1

 https://bugs.launchpad.net/ubuntu/+source/metacity/+bug/1573478

:)

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

click

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Alberts Muktupāvels]

Have you changed org.gnome.desktop.wm.preferences focus-mode? What do
you use? click, sloppy or mouse?

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

output under buggy state and "show-desktop-icons == true"

** Attachment added: "out"
   
https://bugs.launchpad.net/ubuntu/+source/metacity/+bug/1538111/+attachment/4645594/+files/out

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Alberts Muktupāvels]

If you are still in that state, can you try to get output of:
- xprop -root; Proabably you can do it with DISPLAY=:0 xprop -root and/or 
typing in hidden terminal window
- xprop and click on nautilus desktop window; You will need to type xprop in 
invisible terminal, then click on desktop, then hide window to get output.

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

from "not show desktop icon" to "show desktop icon"

** Attachment added: "output.webm"
   
https://bugs.launchpad.net/ubuntu/+source/metacity/+bug/1538111/+attachment/4645474/+files/output.webm

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

/var/log/Xorg.0.log ->

[ 35975.896] (II) modeset(0): EDID vendor "CMN", prod id 5568
[ 35975.896] (II) modeset(0): Printing DDC gathered Modelines:
[ 35975.896] (II) modeset(0): Modeline "1920x1080"x0.0  151.60  1920 2010 2070 
2220  1080 1086 1095 1138 -hsync -vsync (68.3 kHz eP)
[ 36169.344] (II) AIGLX: Suspending AIGLX clients for VT switch
[ 36171.511] (II) AIGLX: Resuming AIGLX clients after VT switch
[ 36171.515] (II) modeset(0): EDID vendor "CMN", prod id 5568
[ 36171.515] (II) modeset(0): Printing DDC gathered Modelines:
[ 36171.515] (II) modeset(0): Modeline "1920x1080"x0.0  151.60  1920 2010 2070 
2220  1080 1086 1095 1138 -hsync -vsync (68.3 kHz eP)

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All logs (>= 36169.344) are logs switching "org.gnome.desktop.background
show-desktop-icons"

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

I am currently under buggy state (nautilus + metacity 3.18.4), temperary
using "DISPLAY=:0 gsettings set org.gnome.desktop.background show-
desktop-icons false" to show other window now.

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

See recording of 3.18.4

** Attachment added: "a.flv"
   
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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Alberts Muktupāvels]

Can you post somewhere and/or send me /var/log/Xorg.0.log file?

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Alberts Muktupāvels]

I can not reproduce your problem... Tried to reproduce:
- with my main PC, nvidia card (both proprietary and nouveau )
- with my laptop, intel card
- in virtualbox

:(

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

@Alberts

Hi, I strongly recommend to fix "edge shadow unerased" issue from 3.18.4
version, and upgrade metacity in xenial repository to 3.18.4. Because
current 3.18.3-1ubuntu3 version is very easy to crash, though no window
missing.

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

Hi, I met window missing just now, based on ppa version.

But when I use Ctrl + Shift + I to debug, I found out that the debug
window is also unable to display.

Luckily, I was using nemo, so I switch to tty1 and run:

DISPLAY=:0 gsettings set org.nemo.desktop show-desktop-icons false

Then switching back to desktop, all windows came back. So it is
definitely the background cover all windows.

If I execute "gsettings set org.gnome.gnome-flashback desktop-background
true", then it will also cover all windows, which is similar to this
issue but this issue is cause by nautilus/nemo covering other windows.

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

Firstly, I didn't meet window missing bug with the ppa version till now,
but I'm not sure whether it will happen several days later (Just like
what I had said at #43, it took around 4-5 days to produce one window
missing ..)

Secondly, as for the new issue (title rendering problem), I can provide
the following information:

My Physical PC:

$ lspci | grep NV -i
01:00.0 3D controller: NVIDIA Corporation GM107M [GeForce GTX 850M] (rev a2)

$ lsmod | grep nou
nouveau  1495040  0
mxm_wmi16384  1 nouveau
ttm98304  1 nouveau
i2c_algo_bit   16384  2 i915,nouveau
drm_kms_helper139264  2 i915,nouveau
drm   360448  11 ttm,i915,drm_kms_helper,nouveau
wmi20480  3 msi_wmi,mxm_wmi,nouveau
video  40960  3 i915,msi_wmi,nouveau

-

Open gnome-terminal (or firefox / nautilus / gedit or any other apps
that can support multi tab-pages), and confirm that

1、Makeing the window maximized
2、Using Composite Manager

Then, Ctrl + Shift + T to generate a new tab page, then switching it
will leave the edge shadow of each charactor in the title unerased, like
what I had shown in the above image.

I have tested that,

1、without composite manager, this issue (edge of each title charactor is
unerased) doesn't happen, even when the window is maximized.

2、If the window is not maximized, this issue also doesn't happen, even
when  Composite Manager is enabled.

3、this issue doesn't happen inside my created virtualbox, even if this
virtualbox runs on my current metacity session, with composite manager
enabled.

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Alberts Muktupāvels]

"Hardware: Intel Graphic Card + NV Maxwell Card + Nouveau Driver"

Can you tell something more about your nvidia maxwell card? Have you
tried to use nvidia proprietary  drivers?

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Alberts Muktupāvels]

Does it happens always? I can not reproduce it...

In ppa has current upstream version (from gnome-3-18 branch) - will be
released as 3.18.4 and it includes big changes to fix performance
problems.

Have you seen your previous problems (crash, missing windows) with that
version?

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

I am wondering what you changed in your ppa version. The window title
looks strange when opening multiple tab-pages and switching among them.
(See the image attached ..)

** Attachment added: "image.png"
   
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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

Thanks, I'll try it tonight!

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Alberts Muktupāvels]

https://launchpad.net/~albertsmuktupavels/+archive/ubuntu/metacity-3-18

Please use above PPA for testing - metacity is updated to current
upstream version.

Missing window or windows? It looks like you have this bug quite often -
is it really random or maybe it happens when you do something specific -
open certain application as example?

--

1. Enable org.gtk.settings.debug enable-inspector-keybinding
2. When you have this bug. Right click on desktop (to make sure it has focus) 
and hit Control-Shift-I.
3. Click on 'Show all Objects' icon, select NautilusDesktopWindow, then click 
on 'Show Details' icon.
4. Select properties and then change 'visible' property from TRUE to FALSE.
5. Do you see your windows or they are still hidden?

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Do you have enabled this:
org.gnome.gnome-flashback desktop-background

If it is enabled then disable (it should be disabled by default in
ubuntu). Does that changes something in case if it was enabled?

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Alberts Muktupāvels]

** Patch removed: "Test..."
   
https://bugs.launchpad.net/ubuntu/+source/metacity/+bug/1538111/+attachment/4636056/+files/0001-test.patch

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

Sorry, I met a window missing today with patch "Test...  (1021 bytes,
text/plain) "

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

@Alberts

I think this patch is okay because I didn't meet a crash or window
missing till now!

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

No bug at the moment, otherwise I'll report it!

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Alberts Muktupāvels]

Thanks for info! And how it works till now? Any missing window and/or
that new problem you mentioned?

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

Yes, I have been testing the new patch since yesterday. And it still
requires another one-or-two day testing to confirm~

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Alberts Muktupāvels]

Cui, did you have time to test patch?

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

** Changed in: metacity (Ubuntu)
   Status: Fix Released => In Progress

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Alberts Muktupāvels]

Anthony and Cui, please test patch in comment #33.

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

compiz is soo slow without 3D support, such as KVM & virtualbox.

If I have to use compiz, I will use unity instead of gnome-flashback.

marco2 is a branch of old metacity and currently version is stable
(including composite-manager), and support GTK3 CDE window. It is a good
choice to recompile it with "--enable-gtk3" options. metacity 3.14 is
also stable but have poor support for recent CDE window.

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

Sorry, CDE -> CSD

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Anthony Harrington]

Hate to say this, but the upgrade to 1:3.18.3-1ubuntu3 the otherday has
INTRODUCED a similar bug for me on Ubuntu 16.04 64bit in Gnome fallback
metacity session: didn't run across this bug before.

Closing any window (or even closing a save as dialogue etc) crashes all
windows in the session and falls back to login.

For now, it's probably worth logging into a Gnome fallback Compiz
session (or other) if anyone else is experiencing this.

:/

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Alberts Muktupāvels]

Cui, can you test this patch? I want to know if this does not re-
introduce your bug...

** Patch added: "Test..."
   
https://bugs.launchpad.net/ubuntu/+source/metacity/+bug/1538111/+attachment/4636056/+files/0001-test.patch

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Launchpad Bug Tracker]

This bug was fixed in the package metacity - 1:3.18.3-1ubuntu3

---
metacity (1:3.18.3-1ubuntu3) xenial; urgency=medium

  * Backport upstream change (add_window_back_to_compositor.diff) to fix
windows getting hidden sometimes (LP: #1538111).

 -- Dmitry Shachnev   Wed, 13 Apr 2016 17:31:12
+0300

** Changed in: metacity (Ubuntu)
   Status: Confirmed => Fix Released

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Adolfo Jayme]

** Changed in: metacity (Ubuntu)
   Importance: Undecided => Medium

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Alberts Muktupāvels]

Dmitry, I think you can close this bug with this patch:
https://git.gnome.org/browse/metacity/commit/?h=gnome-3-18=04c99abaa2825c0c5f441542da1e698cfcb92f01

Cui, you can not have transparency without compositing manager.

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Title:
  untraceable serious bug in metacity 3.18

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Alberts Muktupāvels]

** Patch removed: "Test"
   
https://bugs.launchpad.net/ubuntu/+source/metacity/+bug/1538111/+attachment/4632782/+files/0001-test.patch

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  untraceable serious bug in metacity 3.18

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[dino99]

@Cui

i've also a desktop that "turn black" sometimes; and have discovered it was due 
to cord'weight acting badly with the hdmi connection, on the top left side of 
the screen. A simple push made on it  and it works again as expected.
Maybe you hit the same problem.

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

Hi, I am happy to report that there is no window missing at the moment,
and compared with the original version, I found out a different
phenomenon after applying this test.patch.


As has been said above, previously when I was using metacity original version, 
there is a small possiblity of window missing.

But now, there is no window missing, instead, there is a small
possiblity for the whole desktop to be turned dark slightly and then
recover in very short time, approximately 0.1 to 0.5 second. The focus
state of windows are correct so this new issue isn't a big deal. And
this issue only happenes after adding this patch.

I think this new version would be better than the orignial version,
because users can at least work normally without replacing window
manager when missing windows.

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  untraceable serious bug in metacity 3.18

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

Okay, I will test soon.

Recent 2 days I was using "metacity --no-composite", and till now I
didn't get a crash or window missing (0 crash and 0 window missing under
no-composite mode).

Though "metacity --no-composite" seems to be more stable, but has poor
support for gtk3 style such as transparency.

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Ubuntu Foundations Team Bug Bot]

The attachment "Test" seems to be a patch.  If it isn't, please remove
the "patch" flag from the attachment, remove the "patch" tag, and if you
are a member of the ~ubuntu-reviewers, unsubscribe the team.

[This is an automated message performed by a Launchpad user owned by
~brian-murray, for any issues please contact him.]

** Tags added: patch

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  untraceable serious bug in metacity 3.18

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Alberts Muktupāvels]

Can you test this patch?

** Patch added: "Test"
   
https://bugs.launchpad.net/ubuntu/+source/metacity/+bug/1538111/+attachment/4632782/+files/0001-test.patch

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  untraceable serious bug in metacity 3.18

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[dino99]

@Cui

not the same as yours (even if it was quite similar) as i'm a gnome-
shell user (so metacity is not concerned)

note: have your tried with a new .profile ? (in case it is borked)

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  untraceable serious bug in metacity 3.18

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

Hi, I have sent a webm recording of this issue.


@dino99
Is this issue same as yours?

** Attachment added: "Ubuntu.webm"
   
https://bugs.launchpad.net/ubuntu/+source/metacity/+bug/1538111/+attachment/4631323/+files/Ubuntu.webm

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  untraceable serious bug in metacity 3.18

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

@Alberts

Sorry, after the change:

   if (frame)
 {
-  xwindow = meta_frame_get_xwindow (frame);
+  xwindow = meta_window_get_xwindow (window);
 }
   else
 {

It still crashes.

---


Testing report (metacity 3.18.3-1ubuntu2):

1) Hardware: Intel Graphic Card + NV Maxwell Card + Nouveau Driver;

2) Mode: metacity compositing mode;

3) open firefox playing some HTML5 videos or other things that requires
3D acceleration;


This is the report:

1) metacity 3.18.3-1ubuntu2 with
a9f28dbc26f5211ef08889109db3dc8c7ba76aca reverting, testing for 2 days:

-> 4 crashes, 0 normal windows missing.


2) metacity 3.18.3-1ubuntu2 (original version, no modification)  for 2
days:

-> 0 crashes, 1 normal windows missing.


3) metacity 3.18.3-1ubuntu2 (with:
  - xwindow = meta_frame_get_xwindow (frame);
  + xwindow = meta_window_get_xwindow (window);
)  for 2 days:

-> 1 crashes, 0 normal windows missing.

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  untraceable serious bug in metacity 3.18

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[dino99]

feedback:
my issue (#11) has been solved by the today's upgrades; so sorry  for the spam.

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  untraceable serious bug in metacity 3.18

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Alberts Muktupāvels]

Can you try this:
replace
if (frame) xwindow = meta_frame_get_xwindow (frame);
with
if (frame) xwindow = meta_window_get_xwindow (window);

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

@Alberts

Okay .. It begins to crash after reverting this patch on the newest
metacity version.

Metacity crashes up to 4 times today, but doesn't making windows
disappearing any more!

Without the reverting of this patch, Metacity never crashes itself, but
leading to 3-4 times of window missing every day.

It seems that this patch makes metacity not crash any more but begin to
disappear normal widgets other than nautilus background. So I guess it's
very likely that "xrender_free_window" cause this issue.

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

@Alberts

I am testing the revert of this patch for one day, but it might take
several days to better confirm. Currently, nothing wrong happens, in
terms of both crashes and window disappearing.

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[dino99]

@Cui

yes i just decover that issue too (as i never use alt-tab before) : 
- open 3 apps
- hit alt tab: a popup propose the 3 opened apps:
  a) if the alt key is released, then the switch is made between the 2nd & 3rd 
opened apps only. (in fact the last active one & the previous one)
  3) but if alt key IS NOT released, then selecting the app from the popup 
works, and the switch is done as expected.

Well, the design seems have changed and is not as intuitive as expected.

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

@dino99

mutter in xenial has problem switching windows here on my PC. When I
open more than 3 windows, Alt+Tab will only switch bewteen two of them.
How about you?

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[dino99]

mutter seems indeed a better candidate in my case. But both xenial
installations use the same genuine version: one has no problem, the
other has that strange issue (as the opened apps was 'linked' when
closing one)

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Alberts Muktupāvels]

GNOME Shell does not use metacity... So it might be different bug, or
"shared" bug in both - metacity and mutter. Tried to run GNOME Shell
session in virtual box, tried few times to open & close midori &
synaptic, but for me everything works... :(

Cui, if bug is only with compositing manager then you could try to revert this 
commit:
https://git.gnome.org/browse/metacity/commit/?id=a9f28dbc26f5211ef08889109db3dc8c7ba76aca
(it might introduce crashes...)

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

@dino99

Yes. I am using "metacity >/tmp/stdout 2>/tmp/stderr" to save the log.
When this bug happens, no text generated from those files.

As for "1)" that you said, the browser is not merely closed. To be more
precise, its widget become transparent (covered by nautilus background),
and the process is still running.

"killing nautilus" or "restarting metacity" will display those widget
again.

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

Two of my PC are also both with NV card.

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: metacity (Ubuntu)
   Status: New => Confirmed

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[dino99]

@Alberts

also have that issue on a fresh xenial 64 bits , ext4 partition,
installed from the mini.iso, and using a gnome-shell session with
nvidia-361. This is a pure genuine install (no ppa or else) but share an
ext3 /home with wily 32 bits & an other wily 64-> xenial 64 dist-
upgraded.

1) with the fresh install : when i have 'midori' (example case) and
'synaptic' (other example) opened on  the  same workspace. Then if i
click on the top left x to close 'synaptic', it is closed as expected,
but also the browser (which is not expected). The strangeness: no error
popup nor logged. So its difficult to blame a package or an other.

2) with the dist-upgraded xenial, there is no such problem. But it has
its own home folder (does not share the /home partition.

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

I don't know because I am always under compositing mode. no-compositing
is ugly.

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Alberts Muktupāvels]

Does that happens also when compositing-manager is disabled?

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

I found out the reason, but I don't know how to reproduce the bug.

Sometimes, metacity failed to recognize depth layer of "nautilus/nemo-
background" and normal window, see the following ->


When I get trapped into this bug described above, running "killalll
nautilus" under tty1 (Ctrl+F1), then all window except nautilus
background can be seen !!! It seems that metacity thinks
nautilus background has higher layer than normal windows.


I don't think it's the bug from nautilus, because of the following proof:


1) even replacing nautilus with other similar file explorer like nemo, this bug 
also happens;

2) when using compiz or older version of metacity, this bug don't
happen;


So I think there should be some check of source code that is related with the 
top-level window  covering other window. Don't let nautilus background (nemo 
-n) cover all normal windows.

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

It's still very random and hard to catch.

But recently I found that if I plugin/plugout external Screen Monitor by
HDMI/VGA/..

This bug is more possible to  reproducible, but still not every time.

Only "close a window" may get stuck in this bug, it seems that all of
other windows are 100% transparent because their menubar can still popup
menu.

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Alberts Muktupāvels]

You did say that it is reproducible in vbox. Can you give steps that I
should follow to at least get a chance to reproduce this?

Something like this:
- download current daily iso
- install it
- install applications x, y and z
- open a, z, y, x
- try closing them
- repeat?

But please verify that it is really reproducible on clean install (in
vbox). I am running ubuntu 16.04 from start and have not seen this bug.
But I will try to reproduce this in vbox after you will post at least
possible steps that could lead to this bug.

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

Hi, I am unable to trace the bug but it happens every day.

BTW, I recompile metacity 3.14 (vivid) and run it under xenial, it works
well for half a month and never appear this bug til now ~~

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

I guess that when I hide or close a certain window, metacity has a
possiblity to "hide all window".

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Cui Wei]

This bug happens in both vbox and all of my physical computer.

** Attachment added: "window are disappeared but menu from disappeared window 
is still able to display"
   
https://bugs.launchpad.net/ubuntu/+source/metacity/+bug/1538111/+attachment/4556789/+files/VirtualBox_Ubuntu_26_01_2016_20_11_34.png

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[Bug 1538111] Re: untraceable serious bug in metacity 3.18

[Alberts Muktupāvels]

You need to come up with steps how to reproduce this...

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