KDOC 200: X windowのログを見る

この文書のステータス

  • 作成
    • 2024-07-20 貴島
  • レビュー
    • 2024-07-22 貴島

概要

X Window Systemアプリケーションをデバッグ、学習するために、ログを確認する。 

xtrace -o output.log ./app

000:<:0001: 20: Request(55): CreateGC cid=0x05600001 drawable=0x00000773 values={foreground=0x00ffffff}
000:<:0002: 40: Request(1): CreateWindow depth=0x18 window=0x05600002 parent=0x00000773 x=-1000 y=-1000 width=1 height=1 border-width=0 class=InputOutput(0x0001) visual=0x00000021 value-list={override-redirect=true(0x01) event-mask=PropertyChange}
000:<:0003:  8: Request(8): MapWindow window=0x05600002
000:<:0004: 16: Request(98): QueryExtension name='XINERAMA'
000:>:0004:32: Reply to QueryExtension: present=true(0x01) major-opcode=141 first-event=0 first-error=0

このようにリクエスト、レスポンスする様子や値を確認できる。

また、システムのログを見るとおもしろい。 

head /var/log/Xorg.0.log -n 50

[193692.808]
X.Org X Server 1.21.1.4
X Protocol Version 11, Revision 0
[193692.808] Current Operating System: Linux orange-ThinkPad-X1-Carbon-Gen-10 5.15.0-105-generic #115-Ubuntu SMP Mon Apr 15 09:52:04 UTC 2024 x86_64
[193692.808] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-5.15.0-105-generic root=UUID=2ef9dd21-ea63-4656-8249-b9355b9d7052 ro quiet splash
[193692.808] xorg-server 2:21.1.4-2ubuntu1.7~22.04.10 (For technical support please see http://www.ubuntu.com/support)
[193692.808] Current version of pixman: 0.40.0
[193692.808] 	Before reporting problems, check http://wiki.x.org
	to make sure that you have the latest version.
[193692.808] Markers: (--) probed, (**) from config file, (==) default setting,
	(++) from command line, (!!) notice, (II) informational,
	(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[193692.808] (==) Log file: "/var/log/Xorg.0.log", Time: Tue Jul 16 11:18:22 2024
[193692.808] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[193692.808] (==) No Layout section.  Using the first Screen section.
[193692.808] (==) No screen section available. Using defaults.
[193692.808] (**) |-->Screen "Default Screen Section" (0)
[193692.808] (**) |   |-->Monitor "<default monitor>"
[193692.808] (==) No monitor specified for screen "Default Screen Section".
	Using a default monitor configuration.
[193692.808] (==) Automatically adding devices
[193692.808] (==) Automatically enabling devices
[193692.808] (==) Automatically adding GPU devices
[193692.808] (==) Automatically binding GPU devices
[193692.808] (==) Max clients allowed: 256, resource mask: 0x1fffff
[193692.808] (WW) The directory "/usr/share/fonts/X11/cyrillic" does not exist.
[193692.808] 	Entry deleted from font path.
[193692.808] (WW) The directory "/usr/share/fonts/X11/100dpi/" does not exist.
[193692.808] 	Entry deleted from font path.
[193692.808] (WW) The directory "/usr/share/fonts/X11/75dpi/" does not exist.
[193692.808] 	Entry deleted from font path.
[193692.808] (WW) The directory "/usr/share/fonts/X11/100dpi" does not exist.
[193692.808] 	Entry deleted from font path.
[193692.808] (WW) The directory "/usr/share/fonts/X11/75dpi" does not exist.
[193692.808] 	Entry deleted from font path.
[193692.808] (==) FontPath set to:
	/usr/share/fonts/X11/misc,
	/usr/share/fonts/X11/Type1,
	built-ins
[193692.808] (==) ModulePath set to "/usr/lib/xorg/modules"
[193692.808] (II) The server relies on udev to provide the list of input devices.
	If no devices become available, reconfigure udev or disable AutoAddDevices.
[193692.808] (II) Loader magic: 0x55f1ebf6f020
[193692.808] (II) Module ABI versions:
[193692.808] 	X.Org ANSI C Emulation: 0.4
[193692.808] 	X.Org Video Driver: 25.2
[193692.808] 	X.Org XInput driver : 24.4
[193692.808] 	X.Org Server Extension : 10.0
[193692.809] (++) using VT number 7


tail /var/log/Xorg.0.log -n 50

[331536.041] (II) modeset(0): EDID vendor "AUO", prod id 53905
[331536.041] (II) modeset(0): Using hsync ranges from config file
[331536.041] (II) modeset(0): Using vrefresh ranges from config file
[331536.041] (II) modeset(0): Printing DDC gathered Modelines:
[331536.041] (II) modeset(0): Modeline "1920x1200"x0.0  156.10  1920 1936 1952 2104  1200 1203 1217 1236 -hsync -vsync (74.2 kHz eP)
[332036.859] (II) modeset(0): EDID vendor "AUO", prod id 53905
[332036.859] (II) modeset(0): Using hsync ranges from config file
[332036.859] (II) modeset(0): Using vrefresh ranges from config file
[332036.859] (II) modeset(0): Printing DDC gathered Modelines:
[332036.859] (II) modeset(0): Modeline "1920x1200"x0.0  156.10  1920 1936 1952 2104  1200 1203 1217 1236 -hsync -vsync (74.2 kHz eP)
[337606.169] (II) config/udev: Adding input device WH-1000XM3 (AVRCP) (/dev/input/event17)
[337606.169] (**) WH-1000XM3 (AVRCP): Applying InputClass "libinput keyboard catchall"
[337606.169] (II) Using input driver 'libinput' for 'WH-1000XM3 (AVRCP)'
[337606.169] (**) WH-1000XM3 (AVRCP): always reports core events
[337606.169] (**) Option "Device" "/dev/input/event17"
[337606.169] (II) event17 - WH-1000XM3 (AVRCP): is tagged by udev as: Keyboard
[337606.170] (II) event17 - WH-1000XM3 (AVRCP): device is a keyboard
[337606.170] (II) event17 - WH-1000XM3 (AVRCP): device removed
[337606.192] (**) Option "config_info" "udev:/sys/devices/virtual/input/input34/event17"
[337606.192] (II) XINPUT: Adding extended input device "WH-1000XM3 (AVRCP)" (type: KEYBOARD, id 18)
[337606.192] (**) Option "xkb_model" "pc105"
[337606.192] (**) Option "xkb_layout" "jp"
[337606.192] (WW) Option "xkb_variant" requires a string value
[337606.192] (WW) Option "xkb_options" requires a string value
[337606.194] (II) event17 - WH-1000XM3 (AVRCP): is tagged by udev as: Keyboard
[337606.194] (II) event17 - WH-1000XM3 (AVRCP): device is a keyboard
[344364.017] (II) event17 - WH-1000XM3 (AVRCP): device removed
[344364.068] (II) config/udev: removing device WH-1000XM3 (AVRCP)
[344364.071] (II) UnloadModule: "libinput"
[345174.520] (II) modeset(0): EDID vendor "AUO", prod id 53905
[345174.520] (II) modeset(0): Using hsync ranges from config file
[345174.520] (II) modeset(0): Using vrefresh ranges from config file
[345174.520] (II) modeset(0): Printing DDC gathered Modelines:
[345174.520] (II) modeset(0): Modeline "1920x1200"x0.0  156.10  1920 1936 1952 2104  1200 1203 1217 1236 -hsync -vsync (74.2 kHz eP)
[362198.169] (II) config/udev: Adding input device WH-1000XM3 (AVRCP) (/dev/input/event17)
[362198.169] (**) WH-1000XM3 (AVRCP): Applying InputClass "libinput keyboard catchall"
[362198.169] (II) Using input driver 'libinput' for 'WH-1000XM3 (AVRCP)'
[362198.169] (**) WH-1000XM3 (AVRCP): always reports core events
[362198.169] (**) Option "Device" "/dev/input/event17"
[362198.170] (II) event17 - WH-1000XM3 (AVRCP): is tagged by udev as: Keyboard
[362198.170] (II) event17 - WH-1000XM3 (AVRCP): device is a keyboard
[362198.170] (II) event17 - WH-1000XM3 (AVRCP): device removed
[362198.204] (**) Option "config_info" "udev:/sys/devices/virtual/input/input35/event17"
[362198.204] (II) XINPUT: Adding extended input device "WH-1000XM3 (AVRCP)" (type: KEYBOARD, id 18)
[362198.204] (**) Option "xkb_model" "pc105"
[362198.204] (**) Option "xkb_layout" "jp"
[362198.204] (WW) Option "xkb_variant" requires a string value
[362198.204] (WW) Option "xkb_options" requires a string value
[362198.207] (II) event17 - WH-1000XM3 (AVRCP): is tagged by udev as: Keyboard
[362198.207] (II) event17 - WH-1000XM3 (AVRCP): device is a keyboard
  • 画面サイズ 1920x1200 などが表示されていて何かしていることがわかる
  • WH-1000XM は使っているワイヤレスヘッドホンの型番だ。これらの接続ログも出されているのがわかる

関連

抽象。

  • 画面に描くアプリが、表示を担う別のプロセスと要求と応答をやりとりして動いている

関連。

なし。

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