1. Wayland information[edit | edit source]
To get many Wayland information, enter:
wayland-info
wayland-info utility output example:
root@stm32mp25-eval-e3-b9-5e:~# wayland-info
interface: 'wl_compositor', version: 5, name: 1
interface: 'wl_subcompositor', version: 1, name: 2
interface: 'wp_viewporter', version: 1, name: 3
interface: 'zxdg_output_manager_v1', version: 2, name: 4
xdg_output_v1
output: 22
name: 'LVDS-1'
logical_x: 0, logical_y: 0
logical_width: 1024, logical_height: 600
interface: 'wp_presentation', version: 1, name: 5
presentation clock id: 1 (CLOCK_MONOTONIC)
interface: 'wp_single_pixel_buffer_manager_v1', version: 1, name: 6
interface: 'wp_tearing_control_manager_v1', version: 1, name: 7
interface: 'zwp_relative_pointer_manager_v1', version: 1, name: 8
interface: 'zwp_pointer_constraints_v1', version: 1, name: 9
interface: 'zwp_input_timestamps_manager_v1', version: 1, name: 10
interface: 'weston_capture_v1', version: 1, name: 11
interface: 'wl_data_device_manager', version: 3, name: 12
interface: 'wl_shm', version: 1, name: 13
formats (fourcc):
0x30334258 = 'XB30'
0x30334241 = 'AB30'
0x34324241 = 'AB24'
0x56555958 = 'XYUV'
0x56595559 = 'YUYV'
0x3231564e = 'NV12'
0x34325559 = 'YU24'
0x32315559 = 'YU12'
0x36314752 = 'RG16'
1 = 'XR24'
0 = 'AR24'
interface: 'weston_touch_calibration', version: 1, name: 14
interface: 'wl_viv', version: 1, name: 15
interface: 'wl_drm', version: 2, name: 16
interface: 'wl_seat', version: 7, name: 17
name: default
capabilities: keyboard touch
keyboard repeat rate: 40
keyboard repeat delay: 400
interface: 'zwp_linux_dmabuf_v1', version: 3, name: 18
formats (fourcc) and modifiers (names):
0x32315659 = 'YV12'; 0x0000000000000000 = LINEAR
0x32315659 = 'YV12'; 0x00ffffffffffffff = INVALID
0x32315559 = 'YU12'; 0x0000000000000000 = LINEAR
0x32315559 = 'YU12'; 0x00ffffffffffffff = INVALID
0x3136564e = 'NV61'; 0x0000000000000000 = LINEAR
0x3136564e = 'NV61'; 0x00ffffffffffffff = INVALID
0x3631564e = 'NV16'; 0x0000000000000000 = LINEAR
0x3631564e = 'NV16'; 0x00ffffffffffffff = INVALID
0x3132564e = 'NV21'; 0x0000000000000000 = LINEAR
0x3132564e = 'NV21'; 0x00ffffffffffffff = INVALID
0x3231564e = 'NV12'; 0x0000000000000000 = LINEAR
0x3231564e = 'NV12'; 0x00ffffffffffffff = INVALID
0x59555956 = 'VYUY'; 0x0000000000000000 = LINEAR
0x59555956 = 'VYUY'; 0x00ffffffffffffff = INVALID
0x59565955 = 'UYVY'; 0x0000000000000000 = LINEAR
0x59565955 = 'UYVY'; 0x00ffffffffffffff = INVALID
0x55595659 = 'YVYU'; 0x0000000000000000 = LINEAR
0x55595659 = 'YVYU'; 0x00ffffffffffffff = INVALID
0x56595559 = 'YUYV'; 0x0000000000000000 = LINEAR
0x56595559 = 'YUYV'; 0x00ffffffffffffff = INVALID
0x34324142 = 'BA24'; 0x0600000000000004 = VIVANTE_SPLIT_SUPER_TILED
0x34324142 = 'BA24'; 0x0000000000000000 = LINEAR
0x34324142 = 'BA24'; 0x00ffffffffffffff = INVALID
0x34324152 = 'RA24'; 0x0600000000000004 = VIVANTE_SPLIT_SUPER_TILED
0x34324152 = 'RA24'; 0x0000000000000000 = LINEAR
0x34324152 = 'RA24'; 0x00ffffffffffffff = INVALID
0x34324241 = 'AB24'; 0x0600000000000004 = VIVANTE_SPLIT_SUPER_TILED
0x34324241 = 'AB24'; 0x0000000000000000 = LINEAR
0x34324241 = 'AB24'; 0x00ffffffffffffff = INVALID
0x34325241 = 'AR24'; 0x0600000000000004 = VIVANTE_SPLIT_SUPER_TILED
0x34325241 = 'AR24'; 0x0000000000000000 = LINEAR
0x34325241 = 'AR24'; 0x00ffffffffffffff = INVALID
0x34325842 = 'BX24'; 0x0600000000000004 = VIVANTE_SPLIT_SUPER_TILED
0x34325842 = 'BX24'; 0x0000000000000000 = LINEAR
0x34325842 = 'BX24'; 0x00ffffffffffffff = INVALID
0x34325852 = 'RX24'; 0x0600000000000004 = VIVANTE_SPLIT_SUPER_TILED
0x34325852 = 'RX24'; 0x0000000000000000 = LINEAR
0x34325852 = 'RX24'; 0x00ffffffffffffff = INVALID
0x34324258 = 'XB24'; 0x0600000000000004 = VIVANTE_SPLIT_SUPER_TILED
0x34324258 = 'XB24'; 0x0000000000000000 = LINEAR
0x34324258 = 'XB24'; 0x00ffffffffffffff = INVALID
0x34325258 = 'XR24'; 0x0600000000000004 = VIVANTE_SPLIT_SUPER_TILED
0x34325258 = 'XR24'; 0x0000000000000000 = LINEAR
0x34325258 = 'XR24'; 0x00ffffffffffffff = INVALID
0x36314742 = 'BG16'; 0x0600000000000004 = VIVANTE_SPLIT_SUPER_TILED
0x36314742 = 'BG16'; 0x0000000000000000 = LINEAR
0x36314742 = 'BG16'; 0x00ffffffffffffff = INVALID
0x36314752 = 'RG16'; 0x0600000000000004 = VIVANTE_SPLIT_SUPER_TILED
0x36314752 = 'RG16'; 0x0000000000000000 = LINEAR
0x36314752 = 'RG16'; 0x00ffffffffffffff = INVALID
0x35314241 = 'AB15'; 0x0600000000000004 = VIVANTE_SPLIT_SUPER_TILED
0x35314241 = 'AB15'; 0x0000000000000000 = LINEAR
0x35314241 = 'AB15'; 0x00ffffffffffffff = INVALID
0x35315241 = 'AR15'; 0x0600000000000004 = VIVANTE_SPLIT_SUPER_TILED
0x35315241 = 'AR15'; 0x0000000000000000 = LINEAR
0x35315241 = 'AR15'; 0x00ffffffffffffff = INVALID
0x35314258 = 'XB15'; 0x0600000000000004 = VIVANTE_SPLIT_SUPER_TILED
0x35314258 = 'XB15'; 0x0000000000000000 = LINEAR
0x35314258 = 'XB15'; 0x00ffffffffffffff = INVALID
0x35315258 = 'XR15'; 0x0600000000000004 = VIVANTE_SPLIT_SUPER_TILED
0x35315258 = 'XR15'; 0x0000000000000000 = LINEAR
0x35315258 = 'XR15'; 0x00ffffffffffffff = INVALID
0x32314241 = 'AB12'; 0x0600000000000004 = VIVANTE_SPLIT_SUPER_TILED
0x32314241 = 'AB12'; 0x0000000000000000 = LINEAR
0x32314241 = 'AB12'; 0x00ffffffffffffff = INVALID
0x32315241 = 'AR12'; 0x0600000000000004 = VIVANTE_SPLIT_SUPER_TILED
0x32315241 = 'AR12'; 0x0000000000000000 = LINEAR
0x32315241 = 'AR12'; 0x00ffffffffffffff = INVALID
0x32314258 = 'XB12'; 0x0600000000000004 = VIVANTE_SPLIT_SUPER_TILED
0x32314258 = 'XB12'; 0x0000000000000000 = LINEAR
0x32314258 = 'XB12'; 0x00ffffffffffffff = INVALID
0x32315258 = 'XR12'; 0x0600000000000004 = VIVANTE_SPLIT_SUPER_TILED
0x32315258 = 'XR12'; 0x0000000000000000 = LINEAR
0x32315258 = 'XR12'; 0x00ffffffffffffff = INVALID
interface: 'weston_direct_display_v1', version: 1, name: 19
interface: 'zwp_linux_explicit_synchronization_v1', version: 2, name: 20
interface: 'weston_content_protection', version: 1, name: 21
interface: 'wl_output', version: 4, name: 22
name: LVDS-1
description: unknown
x: 0, y: 0, scale: 1,
physical_width: 156 mm, physical_height: 92 mm,
make: 'unknown', model: 'unknown',
subpixel_orientation: unknown, output_transform: normal,
mode:
width: 1024 px, height: 600 px, refresh: 60.013 Hz,
flags: current preferred
interface: 'zwp_input_panel_v1', version: 1, name: 23
interface: 'zwp_input_method_v1', version: 1, name: 24
interface: 'zwp_text_input_manager_v1', version: 1, name: 25
interface: 'xdg_wm_base', version: 5, name: 26
interface: 'weston_desktop_shell', version: 1, name: 27
2. Wayland logs[edit | edit source]
To get the logs of the Wayland protocol messages, set this environment variable before launching your application:
export WAYLAND_DEBUG=1
or you can assign it in your application command line:
WAYLAND_DEBUG=1 ./your_application
You will get the Wayland protocol messages linked to your application:
[3192810.971] -> wl_display@1.get_registry(new id wl_registry@2)
[3192811.087] -> wl_display@1.sync(new id wl_callback@3)
[3192811.459] wl_display@1.delete_id(3)
[3192811.495] wl_registry@2.global(1, "wl_compositor", 5)
[3192811.527] -> wl_registry@2.bind(1, "wl_compositor", 4, new id [unknown]@4)
[3192811.556] wl_registry@2.global(2, "wl_subcompositor", 1)
[3192811.580] wl_registry@2.global(3, "wp_viewporter", 1)
[3192811.602] wl_registry@2.global(4, "zxdg_output_manager_v1", 2)
[3192811.624] wl_registry@2.global(5, "wp_presentation", 1)
[3192811.645] wl_registry@2.global(6, "wp_single_pixel_buffer_manager_v1", 1)
[3192811.667] wl_registry@2.global(7, "zwp_relative_pointer_manager_v1", 1)
[3192811.689] wl_registry@2.global(8, "zwp_pointer_constraints_v1", 1)
[3192811.711] wl_registry@2.global(9, "zwp_input_timestamps_manager_v1", 1)
[3192811.733] wl_registry@2.global(10, "wl_data_device_manager", 3)
[3192811.755] wl_registry@2.global(11, "wl_shm", 1)
[3192811.778] -> wl_registry@2.bind(11, "wl_shm", 1, new id [unknown]@5)
[3192811.958] -> wl_shm@5.create_pool(new id wl_shm_pool@6, fd 5, 4096)
[3192812.520] -> wl_shm_pool@6.resize(8832)
[3192812.663] -> wl_shm_pool@6.resize(18624)
[3192812.754] wl_registry@2.global(12, "weston_touch_calibration", 1)
...
3. Saving Weston logs in a file[edit | edit source]
Standard Weston logs are available in the /home/weston/weston.log file when Weston is started with the "weston user" using the systemd service.
cat /home/weston/weston.log
4. To go further[edit | edit source]
You can refer to the official Wayland and Weston documentations:
- Wayland documentation main page: https://wayland.freedesktop.org/docs/html/index.html
- Weston documentation main page: https://wayland.pages.freedesktop.org/weston/index.html