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how to determine which composite manager is running

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1

I'm using Arch Linux, and have both Gnome and the i3 window manager installed. When running i3, I'm trying to initiate the composite manager Compton. But trying to do so results in the following error:

compton

[ 04/11/2019 22:32:36.443 register_cm FATAL ERROR ] Another composite manager is already running

I think this means that Compton is already running, or Mutter running, but I'm not sure which.

Is there a command I can use to determine which composite manager is currently running?

mutter compton composite

share|improve this question

asked 3 hours ago

wxyzwxyz

1067

add a comment | 

1

I'm using Arch Linux, and have both Gnome and the i3 window manager installed. When running i3, I'm trying to initiate the composite manager Compton. But trying to do so results in the following error:

compton

[ 04/11/2019 22:32:36.443 register_cm FATAL ERROR ] Another composite manager is already running

I think this means that Compton is already running, or Mutter running, but I'm not sure which.

Is there a command I can use to determine which composite manager is currently running?

mutter compton composite

share|improve this question

asked 3 hours ago

wxyzwxyz

1067

add a comment | 

I'm using Arch Linux, and have both Gnome and the i3 window manager installed. When running i3, I'm trying to initiate the composite manager Compton. But trying to do so results in the following error:

compton

[ 04/11/2019 22:32:36.443 register_cm FATAL ERROR ] Another composite manager is already running

I think this means that Compton is already running, or Mutter running, but I'm not sure which.

Is there a command I can use to determine which composite manager is currently running?

mutter compton composite

share|improve this question

asked 3 hours ago

wxyzwxyz

1067

compton

[ 04/11/2019 22:32:36.443 register_cm FATAL ERROR ] Another composite manager is already running

share|improve this question

asked 3 hours ago

wxyzwxyz

1067

share|improve this question

asked 3 hours ago

wxyzwxyz

1067

asked 3 hours ago

wxyzwxyz

1067

asked 3 hours ago

wxyzwxyz

1067

2 Answers
2

active

oldest

votes

1

I don't have either Compton or Mutter installed, but the xcompmgr sample X composition manager doesn't bother to determine if another composition manager is running, but goes on and just calls XCompositeRedirectSubwindows() and handles the error that may be generated by it in the handler installed with XSetErrorHandler:

static int

error (Display *dpy, XErrorEvent *ev)

{

    ...

    if (ev->request_code == composite_opcode &&

        ev->minor_code == X_CompositeRedirectSubwindows)

    {

        fprintf (stderr, "Another composite manager is already runningn");

        exit (1);

This seems to be the only possible way to do it: XCompositeGetOverlayWindow() will always succeed and map the overlay window, whether it's already in use or not:

CompositeGetOverlayWindow

This request indicates that the client wishes to use the Composite Overlay Window of this screen. If this Composite Overlay Window has not yet been mapped, it is mapped by this request.

share|improve this answer

edited 2 hours ago

answered 3 hours ago

mosvymosvy

9,99211236

add a comment | 

0

There is no command to know if any compositor is currently running, as far as I know. But you can use pgrep to know if a given compositor is currently running:

$ pgrep compton

18169

pgrep will give you the PID so you can terminate the process using kill:

$ kill 18169

Alternatively, pkill can terminate the process by feeding it the process name instead of the PID:

$ pkill compton

Some compositors (like Xfce's) may need a different approach to be deactivated:

$ xfwm4 --compositor=off --replace

share|improve this answer

answered 2 hours ago

nxnevnxnev

2,9262524

add a comment | 

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1

I don't have either Compton or Mutter installed, but the xcompmgr sample X composition manager doesn't bother to determine if another composition manager is running, but goes on and just calls XCompositeRedirectSubwindows() and handles the error that may be generated by it in the handler installed with XSetErrorHandler:

static int

error (Display *dpy, XErrorEvent *ev)

{

    ...

    if (ev->request_code == composite_opcode &&

        ev->minor_code == X_CompositeRedirectSubwindows)

    {

        fprintf (stderr, "Another composite manager is already runningn");

        exit (1);

This seems to be the only possible way to do it: XCompositeGetOverlayWindow() will always succeed and map the overlay window, whether it's already in use or not:

CompositeGetOverlayWindow

This request indicates that the client wishes to use the Composite Overlay Window of this screen. If this Composite Overlay Window has not yet been mapped, it is mapped by this request.

share|improve this answer

edited 2 hours ago

answered 3 hours ago

mosvymosvy

9,99211236

add a comment | 

1

I don't have either Compton or Mutter installed, but the xcompmgr sample X composition manager doesn't bother to determine if another composition manager is running, but goes on and just calls XCompositeRedirectSubwindows() and handles the error that may be generated by it in the handler installed with XSetErrorHandler:

static int

error (Display *dpy, XErrorEvent *ev)

{

    ...

    if (ev->request_code == composite_opcode &&

        ev->minor_code == X_CompositeRedirectSubwindows)

    {

        fprintf (stderr, "Another composite manager is already runningn");

        exit (1);

This seems to be the only possible way to do it: XCompositeGetOverlayWindow() will always succeed and map the overlay window, whether it's already in use or not:

CompositeGetOverlayWindow

This request indicates that the client wishes to use the Composite Overlay Window of this screen. If this Composite Overlay Window has not yet been mapped, it is mapped by this request.

share|improve this answer

edited 2 hours ago

answered 3 hours ago

mosvymosvy

9,99211236

add a comment | 

I don't have either Compton or Mutter installed, but the xcompmgr sample X composition manager doesn't bother to determine if another composition manager is running, but goes on and just calls XCompositeRedirectSubwindows() and handles the error that may be generated by it in the handler installed with XSetErrorHandler:

static int

error (Display *dpy, XErrorEvent *ev)

{

    ...

    if (ev->request_code == composite_opcode &&

        ev->minor_code == X_CompositeRedirectSubwindows)

    {

        fprintf (stderr, "Another composite manager is already runningn");

        exit (1);

This seems to be the only possible way to do it: XCompositeGetOverlayWindow() will always succeed and map the overlay window, whether it's already in use or not:

CompositeGetOverlayWindow

This request indicates that the client wishes to use the Composite Overlay Window of this screen. If this Composite Overlay Window has not yet been mapped, it is mapped by this request.

share|improve this answer

edited 2 hours ago

answered 3 hours ago

mosvymosvy

9,99211236

static int

error (Display *dpy, XErrorEvent *ev)

{

    ...

    if (ev->request_code == composite_opcode &&

        ev->minor_code == X_CompositeRedirectSubwindows)

    {

        fprintf (stderr, "Another composite manager is already runningn");

        exit (1);

share|improve this answer

edited 2 hours ago

answered 3 hours ago

mosvymosvy

9,99211236

answered 3 hours ago

mosvymosvy

9,99211236

answered 3 hours ago

mosvymosvy

9,99211236

0

There is no command to know if any compositor is currently running, as far as I know. But you can use pgrep to know if a given compositor is currently running:

$ pgrep compton

18169

pgrep will give you the PID so you can terminate the process using kill:

$ kill 18169

Alternatively, pkill can terminate the process by feeding it the process name instead of the PID:

$ pkill compton

Some compositors (like Xfce's) may need a different approach to be deactivated:

$ xfwm4 --compositor=off --replace

share|improve this answer

answered 2 hours ago

nxnevnxnev

2,9262524

add a comment | 

0

There is no command to know if any compositor is currently running, as far as I know. But you can use pgrep to know if a given compositor is currently running:

$ pgrep compton

18169

pgrep will give you the PID so you can terminate the process using kill:

$ kill 18169

Alternatively, pkill can terminate the process by feeding it the process name instead of the PID:

$ pkill compton

Some compositors (like Xfce's) may need a different approach to be deactivated:

$ xfwm4 --compositor=off --replace

share|improve this answer

answered 2 hours ago

nxnevnxnev

2,9262524

add a comment | 

There is no command to know if any compositor is currently running, as far as I know. But you can use pgrep to know if a given compositor is currently running:

$ pgrep compton

18169

pgrep will give you the PID so you can terminate the process using kill:

$ kill 18169

Alternatively, pkill can terminate the process by feeding it the process name instead of the PID:

$ pkill compton

Some compositors (like Xfce's) may need a different approach to be deactivated:

$ xfwm4 --compositor=off --replace

share|improve this answer

answered 2 hours ago

nxnevnxnev

2,9262524

$ pgrep compton

18169

$ kill 18169

$ pkill compton

$ xfwm4 --compositor=off --replace

share|improve this answer

answered 2 hours ago

nxnevnxnev

2,9262524

answered 2 hours ago

nxnevnxnev

2,9262524

answered 2 hours ago

nxnevnxnev

2,9262524