How to programmatically rotate the screen in Gnome 3.28 (Wayland)

gnomewayland

I know how to rotate the screen in Xorg using xrandr or in Wayland using the gnome-control-center GUI, but is there a way to do it in Wayland using a command line interface or an API call ?

Context: I have a convertible laptop which is not supported by iio-sensor-proxy, and I would like to use a script or shortcut to quickly rotate the screen. Going back to Xorg is not an option.

Best Answer

A partial solution is to set the rotate-monitor key to some keybinding using gsettings or dconf-editor.

For instance, the following command will cause Ctrl+F8 to rotate the screen counterclockwise:

$ gsettings set org.gnome.mutter.keybindings rotate-monitor "['XF86RotateWindows', '<Control>F8']"

This does not allow the user to specify the target orientation, but only to rotate the screen until the desired orientation is reached.

Related Solutions

Ambient light sensor support in GNOME 3.18

In the end I managed to get it working thanks to the support of one of the iio-sensor-proxy and kernel developers.

In my case I had to pull iio-sensor-proxy from git and apply this patch:

diff --git a/src/drv-iio-poll-light.c b/src/drv-iio-poll-light.c
index c2c5821..b568e78 100644
--- a/src/drv-iio-poll-light.c
+++ b/src/drv-iio-poll-light.c
@@ -37,7 +37,7 @@ iio_poll_light_discover (GUdevDevice *device)
        return FALSE;

    path = g_build_filename (g_udev_device_get_sysfs_path (device),
-                "in_illuminance_input",
+                "in_illuminance_raw",
                 NULL);
    ret = g_file_test (path, G_FILE_TEST_IS_REGULAR);
    g_free (path);
@@ -130,7 +130,7 @@ iio_poll_light_open (GUdevDevice        *device,

    drv_data->interval = get_interval (device);
    drv_data->input_path = g_build_filename (g_udev_device_get_sysfs_path (device),
-                        "in_illuminance_input",
+                        "in_illuminance_raw",
                         NULL);

    return TRUE;

Compiled and installed as per README instruction and finally enabled iio-sensor-proxy.service Now I have automatic brightness adjustment working.

Finally, the dev has submitted a patch to linux kernel that in future will enable iio-sensor-proxy working out of the box also on computers having similar ALS without requiring to patch iio-sensor-proxy.

Display is not capable of DPMS After GNOME Wayland update

So this here works for GNOME 3.24 Wayland:

put all displays in standby:

busctl --user set-property org.gnome.Mutter.DisplayConfig /org/gnome/Mutter/DisplayConfig org.gnome.Mutter.DisplayConfig PowerSaveMode i 1

Resume all displays:

busctl --user set-property org.gnome.Mutter.DisplayConfig /org/gnome/Mutter/DisplayConfig org.gnome.Mutter.DisplayConfig PowerSaveMode i 0

The command can be given over ssh, just in case ;) There does not seem to be a screen lock.

The GNOMErs decided to have gdm run a separate GNOME X session for screen lock, leading to a host of bugs and problems like what session is shown, what session is locked, what session has the keyboard. This is why blanking and screen lock are absent from the Wayland session.

It seems the World has yet to see a screen lock for Wayland.

Best Answer

Related Solutions

Ambient light sensor support in GNOME 3.18

Display is not capable of DPMS After GNOME Wayland update

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